Pub Date : 2022-06-01DOI: 10.5604/01.3001.0016.0753
O. Shorinov
The paper aims to find the magnitude and nature of thermal residual stresses that occur during cooling of a copper sample with a thermally synthesized oxide layer of Cu2O. Thermo-mechanical analysis was performed by the finite element method using Ansys Software. The results of thermal analysis were used to study the resulting stress-strain state of the thin film/coating system after cooling. Based on the modeling results, the paper determined the most stress-strain areas of the sample with a coating, which are the free edges of the interfaces between the copper substrate and the Cu2O oxide layer. The main limitations of the study are the use of certain simplifications in the condition setup, for instance, uniform cooling of the thin film/coating system, homogeneity and isotropy of substrate and thin film materials, invariance of their properties with temperature changes, etc. The results obtained can be used to control the stress-strain state of the thin film/coating system and prevent deformations and destruction of thin-film structures during their production and operation of products with them. The study of new promising methods for the formation of oxide nanostructures, for instance in a plasma environment, requires a sufficient theoretical basis in addressing the origin and development of stresses.
{"title":"Finite element analysis of thermal stress in Cu2O coating synthesized on Cu substrate","authors":"O. Shorinov","doi":"10.5604/01.3001.0016.0753","DOIUrl":"https://doi.org/10.5604/01.3001.0016.0753","url":null,"abstract":"The paper aims to find the magnitude and nature of thermal residual stresses that occur during cooling of a copper sample with a thermally synthesized oxide layer of Cu2O.\u0000\u0000Thermo-mechanical analysis was performed by the finite element method using Ansys Software. The results of thermal analysis were used to study the resulting stress-strain state of the thin film/coating system after cooling.\u0000\u0000Based on the modeling results, the paper determined the most stress-strain areas of the sample with a coating, which are the free edges of the interfaces between the copper substrate and the Cu2O oxide layer.\u0000\u0000The main limitations of the study are the use of certain simplifications in the condition setup, for instance, uniform cooling of the thin film/coating system, homogeneity and isotropy of substrate and thin film materials, invariance of their properties with temperature changes, etc.\u0000\u0000The results obtained can be used to control the stress-strain state of the thin film/coating system and prevent deformations and destruction of thin-film structures during their production and operation of products with them.\u0000\u0000The study of new promising methods for the formation of oxide nanostructures, for instance in a plasma environment, requires a sufficient theoretical basis in addressing the origin and development of stresses.\u0000\u0000","PeriodicalId":8297,"journal":{"name":"Archives of materials science and engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45578522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.5604/01.3001.0016.0754
J. Sawicki, B. Januszewicz, M. Sikora, B. Witkowski
To determine the impact of selected conditions of abrasive treatment on the value and distribution of microhardness and residual stresses in layers carburised by a continuous single-piece flow method. Reference pieces were low pressure carburised at 920°C and then heat-treated in a 4D Quench heat treatment chamber at a pressure of 7 bar and tempered at 190ºC for 3 hours. In the next stage, samples were ground at various vw piece speeds, introducing grinding fluid into the cutting zone using the WET spraying method or using the MQL method at a minimum flow rate. The distribution of microhardness and residual stresses generated in the technological outer layer of the pieces following heat and chemical treatment and the grinding process was measured. Results of the tests indicated that the vw piece speed and method used to supply cooling and lubricating fluid to the grinding zone had an impact on selected parameters of the technological outer layer of flat samples made of 20MnCr5 steel. The process of grinding using an electrocorundum grinding wheel results in a deterioration of residual stresses in the material. For each of the three analysed vw piece speeds, reduced changes in material microhardness prior to cutting occur in the outer layer of samples ground using GF supplied at a minimum flow rate using the MQL method. Environmental considerations and having to conform to increasingly stringent regulations related to environmental protection and employee safety motivate researchers and businesses to entirely eliminate or reduce the use of grinding fluids in the grinding process and, therefore, to optimise grinding technology. Modern manufacturing industry requires the grinding process, which follows heat and chemical treatment, to be performed with the highest possible efficiency. However, retaining high parameters of the technological outer layer in comparison to the sample material following vacuum carburisation (before grinding) is extremely difficult. An optimised configuration of parameters of the grinding process and method of supplying grinding fluids enables meeting the current and future high expectations of the industry in this regard. The tests have enabled us to determine the impact of the applied vw workpiece speed and method of supplying grinding fluid on microhardness and residual stresses. Generally speaking, grinding with an electrocorundum grinding wheel results in a deterioration of residual stresses. For both methods of supplying GF (WET and MQL), the distribution of microhardness in the material of the samples ground with the highest workpiece speed (18.0 m/min) indicated no significant differences with regard to the distribution of microhardness in the material of the samples following heat and chemical treatment.
{"title":"The influence of workpiece speed on microhardness and residual stresses in vacuum-carburised 20MnCr5 steel using the single-piece flow method","authors":"J. Sawicki, B. Januszewicz, M. Sikora, B. Witkowski","doi":"10.5604/01.3001.0016.0754","DOIUrl":"https://doi.org/10.5604/01.3001.0016.0754","url":null,"abstract":"To determine the impact of selected conditions of abrasive treatment on the value and distribution of microhardness and residual stresses in layers carburised by a continuous single-piece flow method.\u0000\u0000Reference pieces were low pressure carburised at 920°C and then heat-treated in a 4D Quench heat treatment chamber at a pressure of 7 bar and tempered at 190ºC for 3 hours. In the next stage, samples were ground at various vw piece speeds, introducing grinding fluid into the cutting zone using the WET spraying method or using the MQL method at a minimum flow rate. The distribution of microhardness and residual stresses generated in the technological outer layer of the pieces following heat and chemical treatment and the grinding process was measured.\u0000\u0000Results of the tests indicated that the vw piece speed and method used to supply cooling and lubricating fluid to the grinding zone had an impact on selected parameters of the technological outer layer of flat samples made of 20MnCr5 steel. The process of grinding using an electrocorundum grinding wheel results in a deterioration of residual stresses in the material. For each of the three analysed vw piece speeds, reduced changes in material microhardness prior to cutting occur in the outer layer of samples ground using GF supplied at a minimum flow rate using the MQL method.\u0000\u0000Environmental considerations and having to conform to increasingly stringent regulations related to environmental protection and employee safety motivate researchers and businesses to entirely eliminate or reduce the use of grinding fluids in the grinding process and, therefore, to optimise grinding technology.\u0000\u0000Modern manufacturing industry requires the grinding process, which follows heat and chemical treatment, to be performed with the highest possible efficiency. However, retaining high parameters of the technological outer layer in comparison to the sample material following vacuum carburisation (before grinding) is extremely difficult. An optimised configuration of parameters of the grinding process and method of supplying grinding fluids enables meeting the current and future high expectations of the industry in this regard.\u0000\u0000The tests have enabled us to determine the impact of the applied vw workpiece speed and method of supplying grinding fluid on microhardness and residual stresses. Generally speaking, grinding with an electrocorundum grinding wheel results in a deterioration of residual stresses. For both methods of supplying GF (WET and MQL), the distribution of microhardness in the material of the samples ground with the highest workpiece speed (18.0 m/min) indicated no significant differences with regard to the distribution of microhardness in the material of the samples following heat and chemical treatment.\u0000\u0000","PeriodicalId":8297,"journal":{"name":"Archives of materials science and engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44751895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-01DOI: 10.5604/01.3001.0016.0680
A. Semenov, Y. Hmelnitska
This article aims to investigate the effectiveness of the use of ultraviolet radiation or a combination of ultraviolet radiation and ozonation in the inactivation of microorganisms in activated carbon "Silcarbon". Several experimental studies where ultraviolet light, a combination of UV radiation, and ozonation were used have been performed to disinfect "Silcarbon" from microbiological contaminants. Experimental results have shown that with pulsed xenon lamps and low-pressure mercury ozone lamps, satisfactory results can be obtained in which the total amount of yeast and mould fungi range from 50 CFU/g to 75 CFU/g. It is advisable to continue the study of powder materials, including drugs, on the content of microbiological contaminants to assess their compliance with regulatory requirements. The application of the proposed approach to the inactivation of microorganisms allows one to obtain a safe sorbent on the content of microbiological indicators and can be successfully used in any other field to disinfection powder materials using different modes of UV irradiation. The originality of the article's results proposes a method of disinfection of the sorbent "Silcarbon" from moulds and yeasts for therapeutic purposes in medicine.
{"title":"Ultraviolet disinfection of activated carbon from microbiological contamination","authors":"A. Semenov, Y. Hmelnitska","doi":"10.5604/01.3001.0016.0680","DOIUrl":"https://doi.org/10.5604/01.3001.0016.0680","url":null,"abstract":"This article aims to investigate the effectiveness of the use of ultraviolet radiation or a combination of ultraviolet radiation and ozonation in the inactivation of microorganisms in activated carbon \"Silcarbon\".\u0000\u0000Several experimental studies where ultraviolet light, a combination of UV radiation, and ozonation were used have been performed to disinfect \"Silcarbon\" from microbiological contaminants.\u0000\u0000Experimental results have shown that with pulsed xenon lamps and low-pressure mercury ozone lamps, satisfactory results can be obtained in which the total amount of yeast and mould fungi range from 50 CFU/g to 75 CFU/g.\u0000\u0000It is advisable to continue the study of powder materials, including drugs, on the content of microbiological contaminants to assess their compliance with regulatory requirements.\u0000\u0000The application of the proposed approach to the inactivation of microorganisms allows one to obtain a safe sorbent on the content of microbiological indicators and can be successfully used in any other field to disinfection powder materials using different modes of UV irradiation.\u0000\u0000The originality of the article's results proposes a method of disinfection of the sorbent \"Silcarbon\" from moulds and yeasts for therapeutic purposes in medicine.\u0000\u0000","PeriodicalId":8297,"journal":{"name":"Archives of materials science and engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43128334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-01DOI: 10.5604/01.3001.0016.0670
K.B. Haouari, Mustapha Ouardouz
This paper aims to investigate the possibilities of using 3D printing by fused deposition modelling (FDM) technology for developing micro-fluidic devices by printing a benchmark test part. A low-cost desktop printer is evaluated to compare the minimum possible diameter size, and accuracy in the microchannel body. The parts were designed using SolidWorks 2016 CAD software and printed using a low-cost desktop FDM printer and Polylactic acid (PLA) filament. Desktop 3D printers are capable of printing open microchannels with minimum dimensions of 300 µm width and 200 µm depth. Future works should focus on developing new materials and optimizing the process parameters of the FDM technique and evaluating other 3D printing technologies and different printers. The paper shows the possibility of desktop 3D printers in printing microfluidic devices and provides a design of a benchmark part for testing and evaluating printing resolution and accuracy.
{"title":"Investigating the capability of low-cost FDM printers in producing microfluidic devices","authors":"K.B. Haouari, Mustapha Ouardouz","doi":"10.5604/01.3001.0016.0670","DOIUrl":"https://doi.org/10.5604/01.3001.0016.0670","url":null,"abstract":"This paper aims to investigate the possibilities of using 3D printing by fused deposition modelling (FDM) technology for developing micro-fluidic devices by printing a benchmark test part. A low-cost desktop printer is evaluated to compare the minimum possible diameter size, and accuracy in the microchannel body.\u0000\u0000The parts were designed using SolidWorks 2016 CAD software and printed using a low-cost desktop FDM printer and Polylactic acid (PLA) filament.\u0000\u0000Desktop 3D printers are capable of printing open microchannels with minimum dimensions of 300 µm width and 200 µm depth.\u0000\u0000Future works should focus on developing new materials and optimizing the process parameters of the FDM technique and evaluating other 3D printing technologies and different printers.\u0000\u0000The paper shows the possibility of desktop 3D printers in printing microfluidic devices and provides a design of a benchmark part for testing and evaluating printing resolution and accuracy.\u0000\u0000","PeriodicalId":8297,"journal":{"name":"Archives of materials science and engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44132653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-01DOI: 10.5604/01.3001.0016.0675
M. J. Jweeg, A. Hassan, M.M. Almudhaffar
To design and manufacture a dynamic cheap prosthetic foot compatible with amputees' requirements by introducing a natural fibre called kenaf (scientific name Hibiscus cannabinus L). In two cases, four suggested designs were analysed using the finite elements method (FEM) with a commercial ANSYS R1 program. The first case was a heel strike. The second was toe-off by subjecting force equal to 70 kg for both cases to select the optimal design. The foot found the tensile strength, flexural strength, impact stress, and fatigue test according to ISO 10328 standards successfully. The selected design was analysed again using the ANSYS R1 program for weights 60, 70, and 80 kg for two sequences, one containing kenaf, to study how such additive could affect the mechanical properties and estimate the proper quality weight of the foot. The winner's design was then produced and tested in a fatigue foot tester according to ISO 10328 standards. The results showed that the sequence containing the natural fibres kanaf material improved the deformation by 20% for both cases (from 7.47 to 8.92 mm for the heel strike case for a weight of 80 kg for the sequence without and with kanaf, respectively), and the damping ratio increased by 50% (0. 188 and 0.273 for the sequence without and with kenaf, respectively), which means an increase in the stored energy and higher stability. Also, the mechanical properties like maximum tensile strength, flexural strength, impact stress, and natural frequency were modified. This paper develops an analytical and practical study to design and produce a dynamic cheap prosthetic foot made from natural fibres, which are characterized as renewable, cheap, recyclable, and environmentally friendly materials with good mechanical properties. Authors believe it is the first time to use natural kenaf fibres in the prosthetic foot manufacturing field.
{"title":"Experimental investigations and finite element modelling of a suggested prosthetic foot","authors":"M. J. Jweeg, A. Hassan, M.M. Almudhaffar","doi":"10.5604/01.3001.0016.0675","DOIUrl":"https://doi.org/10.5604/01.3001.0016.0675","url":null,"abstract":"To design and manufacture a dynamic cheap prosthetic foot compatible with amputees' requirements by introducing a natural fibre called kenaf (scientific name Hibiscus cannabinus L).\u0000\u0000In two cases, four suggested designs were analysed using the finite elements method (FEM) with a commercial ANSYS R1 program. The first case was a heel strike. The second was toe-off by subjecting force equal to 70 kg for both cases to select the optimal design.\u0000\u0000The foot found the tensile strength, flexural strength, impact stress, and fatigue test according to ISO 10328 standards successfully.\u0000\u0000The selected design was analysed again using the ANSYS R1 program for weights 60, 70, and 80 kg for two sequences, one containing kenaf, to study how such additive could affect the mechanical properties and estimate the proper quality weight of the foot. The winner's design was then produced and tested in a fatigue foot tester according to ISO 10328 standards.\u0000\u0000The results showed that the sequence containing the natural fibres kanaf material improved the deformation by 20% for both cases (from 7.47 to 8.92 mm for the heel strike case for a weight of 80 kg for the sequence without and with kanaf, respectively), and the damping ratio increased by 50% (0. 188 and 0.273 for the sequence without and with kenaf, respectively), which means an increase in the stored energy and higher stability. Also, the mechanical properties like maximum tensile strength, flexural strength, impact stress, and natural frequency were modified.\u0000\u0000This paper develops an analytical and practical study to design and produce a dynamic cheap prosthetic foot made from natural fibres, which are characterized as renewable, cheap, recyclable, and environmentally friendly materials with good mechanical properties. Authors believe it is the first time to use natural kenaf fibres in the prosthetic foot manufacturing field.\u0000\u0000","PeriodicalId":8297,"journal":{"name":"Archives of materials science and engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46969171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.5604/01.3001.0016.0027
M. J. Jweeg, D. A. Alazawi, Q. H. Jebur, M. Al-Waily, N. Yasin
This study thoroughly examined the application of inverse FE modelling and indentation tensile tests to identify nanotubes' rubber material properties. Carbon nanotubes with various percentages of multi-walled carbon nanotubes exposed to high tensile stress were used to enhance the mechanical qualities of natural rubber (NR). In this work, carbon nanotubes have been added to natural rubber. By using a solvent casting technique, toluene was used to make nanocomposites. 0.2%, 0.4%, 0.6%, 0.8%, and 1%. In this article, rubber and multi-walled carbon nanotubes interact in practical ways. Mechanical features of carbon nanotubes in NR have been researched. The results will lead to rubber products with improved mechanical qualities compared to present nanocomposite rubber containing various percentages of multi-walled carbon nanotubes exposed to large tensile test loading. The relative fitness error for significant stresses is reasonable with a second or third-order deformation model in numerical results. Non-linear finite element analysis is widely used to optimise complicated elastomeric components' design and reliability studies. However, accurate numerical results cannot be achieved without using rubber or rubber nanocomposite materials with reliable strain energy functions. The indentation tensile tests of rubber samples have been simulated and confirmed using a parametric FE model. An inverse materials parameter identification algorithm was used to calculate the hyperelastic material properties of rubber samples evaluated in uniaxial tensile. Using ABAQUS FE software, material parameters and force-displacement data may be automatically updated and extracted. The numerical data for the inverse method of material property prediction has been successfully established by developing simulation spaces for various material characteristics. The force-displacement curve can be represented using technical methods. The results demonstrate that the inverse FE modelling process might be simplified by using these curve fitting parameters and plot equations to build a mathematical link between curve coefficients and material properties. The first, second, and third-order deformation models were tested using FE simulations for the tensile test.
{"title":"Hyperelastic modelling of rubber with multi-walled carbon nanotubes subjected to tensile loading","authors":"M. J. Jweeg, D. A. Alazawi, Q. H. Jebur, M. Al-Waily, N. Yasin","doi":"10.5604/01.3001.0016.0027","DOIUrl":"https://doi.org/10.5604/01.3001.0016.0027","url":null,"abstract":"This study thoroughly examined the application of inverse FE modelling and indentation tensile tests to identify nanotubes' rubber material properties.\u0000\u0000Carbon nanotubes with various percentages of multi-walled carbon nanotubes exposed to high tensile stress were used to enhance the mechanical qualities of natural rubber (NR).\u0000\u0000In this work, carbon nanotubes have been added to natural rubber. By using a solvent casting technique, toluene was used to make nanocomposites. 0.2%, 0.4%, 0.6%, 0.8%, and 1%. In this article, rubber and multi-walled carbon nanotubes interact in practical ways. Mechanical features of carbon nanotubes in NR have been researched. The results will lead to rubber products with improved mechanical qualities compared to present nanocomposite rubber containing various percentages of multi-walled carbon nanotubes exposed to large tensile test loading. The relative fitness error for significant stresses is reasonable with a second or third-order deformation model in numerical results.\u0000\u0000Non-linear finite element analysis is widely used to optimise complicated elastomeric components' design and reliability studies. However, accurate numerical results cannot be achieved without using rubber or rubber nanocomposite materials with reliable strain energy functions.\u0000\u0000The indentation tensile tests of rubber samples have been simulated and confirmed using a parametric FE model. An inverse materials parameter identification algorithm was used to calculate the hyperelastic material properties of rubber samples evaluated in uniaxial tensile. Using ABAQUS FE software, material parameters and force-displacement data may be automatically updated and extracted.\u0000\u0000The numerical data for the inverse method of material property prediction has been successfully established by developing simulation spaces for various material characteristics. The force-displacement curve can be represented using technical methods. The results demonstrate that the inverse FE modelling process might be simplified by using these curve fitting parameters and plot equations to build a mathematical link between curve coefficients and material properties. The first, second, and third-order deformation models were tested using FE simulations for the tensile test.\u0000\u0000","PeriodicalId":8297,"journal":{"name":"Archives of materials science and engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42928406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.5604/01.3001.0016.0025
P. Rokicki, M. Góral, T. Kubaszek, K. Dychtoń, M. Drajewicz, M. Wierzbińska, K. Ochał
The new ceramic material for Enviromental Barrier Coatings (EBC) on ceramic material was developed. The ytterbium monosilicate was deposited using two methods: atmospheric plasma spray (APS) and plasma spray physical vapour deposition (PS-PVD). Obtained coating was characterized by dense structure and columns typically formed in PS-PVD process were not observed. In comparison with APS-deposited coating, in this method, both elements segregation and formation of ytterbium oxide occurred. The further research for production of columnar coatings will be necessary. Developed coatings migh be used for next generations of ceramic materials used for gas turbine and jet engine blades and vanes as a high temperature and corrosion protection. The first time the ytterbium monosilicate was produced bot by APS and LPPS methods.
{"title":"The microstructure and thermal properties of Yb2SiO5 coating deposited using APS and PS-PVD methods","authors":"P. Rokicki, M. Góral, T. Kubaszek, K. Dychtoń, M. Drajewicz, M. Wierzbińska, K. Ochał","doi":"10.5604/01.3001.0016.0025","DOIUrl":"https://doi.org/10.5604/01.3001.0016.0025","url":null,"abstract":"The new ceramic material for Enviromental Barrier Coatings (EBC) on ceramic material was developed.\u0000\u0000The ytterbium monosilicate was deposited using two methods: atmospheric plasma spray (APS) and plasma spray physical vapour deposition (PS-PVD).\u0000\u0000Obtained coating was characterized by dense structure and columns typically formed in PS-PVD process were not observed. In comparison with APS-deposited coating, in this method, both elements segregation and formation of ytterbium oxide occurred.\u0000\u0000The further research for production of columnar coatings will be necessary.\u0000\u0000Developed coatings migh be used for next generations of ceramic materials used for gas turbine and jet engine blades and vanes as a high temperature and corrosion protection.\u0000\u0000The first time the ytterbium monosilicate was produced bot by APS and LPPS methods.\u0000\u0000","PeriodicalId":8297,"journal":{"name":"Archives of materials science and engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43253430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.5604/01.3001.0016.0026
S. Nazarenko, R. Kovalenko, O. Kolienov, D. Saveliev, V. Miachyn, V. Demianyshyn
To establish the dependence of the change in the values of the twisting angle of the flexible pipeline on the internal water pressure and the defect length, which is directed along and across the axis of the sleeve. Experimental studies were conducted in two stages. At the first stage, the methodology and plan of the experiment were developed, the factors and their values were determined, and experimental studies were conducted. The limits of variation in the area of factor spaces were established based on the basic analysis of a priori information. The length of the defect was 0, 50 and 100 mm. The pressure values in the sleeve were 0.2, 0.4 and 0.6 MPa. Adequacy of the obtained regression equations was checked using Fisher's test. At the second stage, the analysis of the research results was carried out and the numerical values of the factors that most affect the change in the value of the twisting angle of the sleeve were established. According to the results of experimental studies, the dependences of the change in the twisting angle of the flexible pipeline on the internal water pressure and the length of the defect were obtained. It was established that the dependence of the previously mentioned factors is close to linear. The largest discrepancy in the maximum sleeve twist angle – 21% was observed at pressure values of 0.4 MPa. The research was limited to only two factors: the defect length and the pressure in the middle of the sleeve. Such factors as the degree of wear of the sleeve, the type of sleeve and the number of defects on the test sample were not taken into account. The obtained results can be used during the development of a new method of testing flexible pipelines, which will allow to establish hidden defects in them. For the first time, the dependence of the influence of the size and direction of the defect on the reinforcing frame of the pressure fire hose on the value of its twist angle at constant internal pressure indicators was established.
{"title":"Influence of the artificial defect on the flexible pipeline twist angle","authors":"S. Nazarenko, R. Kovalenko, O. Kolienov, D. Saveliev, V. Miachyn, V. Demianyshyn","doi":"10.5604/01.3001.0016.0026","DOIUrl":"https://doi.org/10.5604/01.3001.0016.0026","url":null,"abstract":"To establish the dependence of the change in the values of the twisting angle of the flexible pipeline on the internal water pressure and the defect length, which is directed along and across the axis of the sleeve.\u0000\u0000Experimental studies were conducted in two stages. At the first stage, the methodology and plan of the experiment were developed, the factors and their values were determined, and experimental studies were conducted. The limits of variation in the area of factor spaces were established based on the basic analysis of a priori information. The length of the defect was 0, 50 and 100 mm. The pressure values in the sleeve were 0.2, 0.4 and 0.6 MPa. Adequacy of the obtained regression equations was checked using Fisher's test. At the second stage, the analysis of the research results was carried out and the numerical values of the factors that most affect the change in the value of the twisting angle of the sleeve were established.\u0000\u0000According to the results of experimental studies, the dependences of the change in the twisting angle of the flexible pipeline on the internal water pressure and the length of the defect were obtained. It was established that the dependence of the previously mentioned factors is close to linear. The largest discrepancy in the maximum sleeve twist angle – 21% was observed at pressure values of 0.4 MPa.\u0000\u0000The research was limited to only two factors: the defect length and the pressure in the middle of the sleeve. Such factors as the degree of wear of the sleeve, the type of sleeve and the number of defects on the test sample were not taken into account.\u0000\u0000The obtained results can be used during the development of a new method of testing flexible pipelines, which will allow to establish hidden defects in them.\u0000\u0000For the first time, the dependence of the influence of the size and direction of the defect on the reinforcing frame of the pressure fire hose on the value of its twist angle at constant internal pressure indicators was established.\u0000\u0000","PeriodicalId":8297,"journal":{"name":"Archives of materials science and engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49417798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-01DOI: 10.5604/01.3001.0015.9851
C. Sheng, Nagentrau Muniandy, N. H. Ibrahim
Purpose: This study addresses the brittle fracture propagation behaviour modelling of hydroxyapatite (HAp) coating in artificial femoral stem component. Design/methodology/approach: A simple two dimensional flat-on-flat contact configuration finite element model consisting contact pad (bone), Ti-6Al-4V substrate and HAp coating is employed in static simulation. The HAp coating is modelled as elastic layer with pre-microcrack which assumed to be initiated due to stress singularity. Findings: The study revealed that reducing coating thickness, pre-microcrack length and artificial femoral stem elastic modulus along with increasing bone elastic modulus will result in significant stress intensity factor (SIF) to promote brittle fracture propagation behaviour. Research limitations/implications: The influence of coating thickness, pre-microcrack length, bone and artificial femoral stem elastic modulus on fracture behaviour is examined under different stress ratio using J-integral analysis approach. Practical implications: The proposed finite element model can be easily accommodating different Hap coating thickness, pre-microcrack length, bone and artificial femoral stem elastic modulus to perform detailed parametric studies with minimal costly experimental works. Originality/value: Limited research focussing on brittle fracture propagation behaviour of HAp coating in artificial femoral stem component. Thus, present study analysed the influence of coating thickness, pre-microcrack length, bone and artificial femoral stem elastic modulus on stress intensity factor (SIF) of HAp coating.
{"title":"Prediction of brittle fracture propagation behaviour of hydroxyapatite (HAp) coating in artificial femoral stem component","authors":"C. Sheng, Nagentrau Muniandy, N. H. Ibrahim","doi":"10.5604/01.3001.0015.9851","DOIUrl":"https://doi.org/10.5604/01.3001.0015.9851","url":null,"abstract":"Purpose: This study addresses the brittle fracture propagation behaviour modelling of hydroxyapatite (HAp) coating in artificial femoral stem component.\u0000\u0000Design/methodology/approach: A simple two dimensional flat-on-flat contact configuration finite element model consisting contact pad (bone), Ti-6Al-4V substrate and HAp coating is employed in static simulation. The HAp coating is modelled as elastic layer with pre-microcrack which assumed to be initiated due to stress singularity.\u0000\u0000Findings: The study revealed that reducing coating thickness, pre-microcrack length and artificial femoral stem elastic modulus along with increasing bone elastic modulus will result in significant stress intensity factor (SIF) to promote brittle fracture propagation behaviour.\u0000\u0000Research limitations/implications: The influence of coating thickness, pre-microcrack length, bone and artificial femoral stem elastic modulus on fracture behaviour is examined under different stress ratio using J-integral analysis approach.\u0000\u0000Practical implications: The proposed finite element model can be easily accommodating different Hap coating thickness, pre-microcrack length, bone and artificial femoral stem elastic modulus to perform detailed parametric studies with minimal costly experimental works.\u0000\u0000Originality/value: Limited research focussing on brittle fracture propagation behaviour of HAp coating in artificial femoral stem component. Thus, present study analysed the influence of coating thickness, pre-microcrack length, bone and artificial femoral stem elastic modulus on stress intensity factor (SIF) of HAp coating.\u0000\u0000","PeriodicalId":8297,"journal":{"name":"Archives of materials science and engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45115509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-01DOI: 10.5604/01.3001.0015.9850
A. Breus, S. Abashin, I. Lukashov, O. Serdiuk
Purpose: Application of plasma glow discharge to copper oxide nanostructure growth is studied. The simplicity of the proposed technique may be beneficial for the development of new plasma reactors for large-scale production of diverse metal oxide nanostructures. Design/methodology/approach: Copper sample was placed on anode of a setup designed to ignite plasma glow discharge. The proposed approach allows eliminating the negative effects of ion bombardment, like sputtering and generation of defects on a surface of the growing nanostructures, but preserves the advantages of thermal growth. The growth process was explained in terms of thermal processes interaction occurring on a surface of the anode with the glow discharge plasma. Findings: Plasma treatment resulted in generation of reach and diverse nanostructures that was confirmed by SEM images. Nanowire-like, flower-like, anemone-like nanostructures and nanodisks composed into the nanoassemblies are observed; the nanostructures are associated with microbabbles on CuO layer. These findings allow concluding about the possible implementation of the proposed method in industry. Research limitations/implications: The main limitation is conditioned by the lack of heat supplied to the anode, and absence of independent control of the heat and ion fluxes; thus, the additional heater should be installed under the anode in order to expand the nomenclature of the nanospecies in the future studies. Practical implications: High-productivity plasma process in copper oxide nanostructures synthesis was confirmed in this research. It may be applied for field emitter and supercapacitor manufacturing. Originality/value: Oxide nanostructure synthesis is conducted by use of a simple and well-known glow discharge technique in order to expand the production yield and diversity of nanostructure obtained in the processes of thermal growth.
{"title":"Anodic growth of copper oxide nanostructures in glow discharge","authors":"A. Breus, S. Abashin, I. Lukashov, O. Serdiuk","doi":"10.5604/01.3001.0015.9850","DOIUrl":"https://doi.org/10.5604/01.3001.0015.9850","url":null,"abstract":"Purpose: Application of plasma glow discharge to copper oxide nanostructure growth is studied. The simplicity of the proposed technique may be beneficial for the development of new plasma reactors for large-scale production of diverse metal oxide nanostructures.\u0000\u0000Design/methodology/approach: Copper sample was placed on anode of a setup designed to ignite plasma glow discharge. The proposed approach allows eliminating the negative effects of ion bombardment, like sputtering and generation of defects on a surface of the growing nanostructures, but preserves the advantages of thermal growth. The growth process was explained in terms of thermal processes interaction occurring on a surface of the anode with the glow discharge plasma.\u0000\u0000Findings: Plasma treatment resulted in generation of reach and diverse nanostructures that was confirmed by SEM images. Nanowire-like, flower-like, anemone-like nanostructures and nanodisks composed into the nanoassemblies are observed; the nanostructures are associated with microbabbles on CuO layer. These findings allow concluding about the possible implementation of the proposed method in industry.\u0000\u0000Research limitations/implications: The main limitation is conditioned by the lack of heat supplied to the anode, and absence of independent control of the heat and ion fluxes; thus, the additional heater should be installed under the anode in order to expand the nomenclature of the nanospecies in the future studies.\u0000\u0000Practical implications: High-productivity plasma process in copper oxide nanostructures synthesis was confirmed in this research. It may be applied for field emitter and supercapacitor manufacturing.\u0000\u0000Originality/value: Oxide nanostructure synthesis is conducted by use of a simple and well-known glow discharge technique in order to expand the production yield and diversity of nanostructure obtained in the processes of thermal growth.\u0000\u0000","PeriodicalId":8297,"journal":{"name":"Archives of materials science and engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41476774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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