Received: 16 December 2019 Accepted: 23 February 2020 The present experimental work focused for evaluating the bond strength and flash mass on deposition of Aluminum 6063 over IS 2062 low carbon steel by friction surfacing using different design of mechtrode face. Five design of mechtrode were chosen, named as MF1, MF2, MF3, MF4 and MF5 for carrying out the friction surfacing with different parametric combinations. Study had shown that the amount of flash mass produced by mechtrode was increased by increasing the mechtrode face contact area. Low flash mass (about 28% of the deposited mass) and high push off strength (79.4 MPa) were noticed in MF5 mechtrode samples. The micro hardness profile at the coating interface highlighted a highest increase of 18.6% hardness at specimen obtained from MF5 mechtrode in comparison with received mechtrode material. The bending test revealed that at high rotational speed (3000 rpm) and high axial force (6 kN) could increase the adhesive bonding at the interface zone. Cross section of coatings obtained from various mechtrode face had shown good bonding adherence quality and high mechanical interlocking which were confirmed by using high amplification FESEM images and the absence of aluminium ferrite (AlFe2O4) at deposition interface were authenticated by XRD analysis.
{"title":"Evaluation of Bond Strength and Flash Mass on Friction Surfaced Deposition of Aluminium 6063 over IS 2062 Low Carbon Steel Using Different Mechtrode Face","authors":"D. Sahoo, B. Mohanty, Amal Maalika Veetil","doi":"10.18280/acsm.440206","DOIUrl":"https://doi.org/10.18280/acsm.440206","url":null,"abstract":"Received: 16 December 2019 Accepted: 23 February 2020 The present experimental work focused for evaluating the bond strength and flash mass on deposition of Aluminum 6063 over IS 2062 low carbon steel by friction surfacing using different design of mechtrode face. Five design of mechtrode were chosen, named as MF1, MF2, MF3, MF4 and MF5 for carrying out the friction surfacing with different parametric combinations. Study had shown that the amount of flash mass produced by mechtrode was increased by increasing the mechtrode face contact area. Low flash mass (about 28% of the deposited mass) and high push off strength (79.4 MPa) were noticed in MF5 mechtrode samples. The micro hardness profile at the coating interface highlighted a highest increase of 18.6% hardness at specimen obtained from MF5 mechtrode in comparison with received mechtrode material. The bending test revealed that at high rotational speed (3000 rpm) and high axial force (6 kN) could increase the adhesive bonding at the interface zone. Cross section of coatings obtained from various mechtrode face had shown good bonding adherence quality and high mechanical interlocking which were confirmed by using high amplification FESEM images and the absence of aluminium ferrite (AlFe2O4) at deposition interface were authenticated by XRD analysis.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"37 1","pages":"109-119"},"PeriodicalIF":0.8,"publicationDate":"2020-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76767975","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}
Received: 20 December 2019 Accepted: 16 February 2020 For the first time, the comparative assessment of Al-SiC-Mg and Al-B4C-Mg hybrid metal matrix composite is being explored. The primary objective of the present work is to compare different properties of reinforced Al7075. Boron carbide and silicon carbide (available in powdered form) were mixed with the alloy in different percentages to check their effect along with magnesium present in powdered form. Boron carbide (also known as black diamond) was selected as it is highly robust and has good shielding properties against neutrons i.e. it absorbs them well. It can stabilize the ionizing radiations and is the third hardest known substance after diamond and cubic boron nitride. Silicon carbide was selected as it has high strength and hardness with good wear resistance properties. Magnesium is selected because it is the lightest of all the metals and has good heat dissipation and good damping capacity. Fabricated composite is lightweight and could find applications in the aircraft industry, automotive parts, and defense applications. Samples were prepared using the modified stir casting method. Samples were then collected from the die and after those mechanical properties were tested (tensile test and hardness test). SEM/EDS and XRD analyses were conducted to briefly study the microstructure and phase of the samples prepared. The recent research involves the novel objective of manufacturing hybrid composite of Al7075 and evaluation of its mechanical properties and surface morphography. The use of hybrid metal matrix composite enables fine-dimensional precision machining of micro-parts, opening up fresh possibilities for micro-components based on Al-SiC-Mg and Al-B4C-Mg.
{"title":"Comparative Micro Structural Investigation of Al-SiC-Mg and Al-B4C-Mg Particulate Metal Matrix Composite","authors":"P. Malhotra, N. Singh, R. Tyagi, B. Sikarwar","doi":"10.18280/acsm.440205","DOIUrl":"https://doi.org/10.18280/acsm.440205","url":null,"abstract":"Received: 20 December 2019 Accepted: 16 February 2020 For the first time, the comparative assessment of Al-SiC-Mg and Al-B4C-Mg hybrid metal matrix composite is being explored. The primary objective of the present work is to compare different properties of reinforced Al7075. Boron carbide and silicon carbide (available in powdered form) were mixed with the alloy in different percentages to check their effect along with magnesium present in powdered form. Boron carbide (also known as black diamond) was selected as it is highly robust and has good shielding properties against neutrons i.e. it absorbs them well. It can stabilize the ionizing radiations and is the third hardest known substance after diamond and cubic boron nitride. Silicon carbide was selected as it has high strength and hardness with good wear resistance properties. Magnesium is selected because it is the lightest of all the metals and has good heat dissipation and good damping capacity. Fabricated composite is lightweight and could find applications in the aircraft industry, automotive parts, and defense applications. Samples were prepared using the modified stir casting method. Samples were then collected from the die and after those mechanical properties were tested (tensile test and hardness test). SEM/EDS and XRD analyses were conducted to briefly study the microstructure and phase of the samples prepared. The recent research involves the novel objective of manufacturing hybrid composite of Al7075 and evaluation of its mechanical properties and surface morphography. The use of hybrid metal matrix composite enables fine-dimensional precision machining of micro-parts, opening up fresh possibilities for micro-components based on Al-SiC-Mg and Al-B4C-Mg.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"20 1","pages":"103-108"},"PeriodicalIF":0.8,"publicationDate":"2020-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72833335","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}
Received: 17 December 2019 Accepted: 25 February 2020 This paper aims to accurately measure the fatigue performance and calculate the fatigue life of fiber-reinforced asphalt concrete (FRAC). Firstly, splitting fatigue tests were conducted under the stress control mode. Through the tests, the attenuation features of the FRAC stiffness modulus were analyzed with different fiber contents and length-todiameter ratios. Drawing on damage mechanics theory, a fatigue failure criterion was put forward for the FRAC. Based on stress ratiofatigue life (S-N) equation, the authors established a calculation model for fatigue life of the FRAC, in the light of the characteristic parameter of fiber content (FCCP). The results show that, the FCCP can reflect the combined effect of fiber content and length-to-diameter ratio on the fatigue performance of the FRAC; With the growth of the FCCP, the FRAC fatigue life always increased first and then decreased; The FRAC realized the longest fatigue life, and achieved the best fatigue performance at the FCCP of 1.13; For AC-13 polyester FRAC (PFAC), the fiber content, length-to-diameter ratio, and the FCCP were optimized as 0.35%, 324, and 1.13, respectively. The research results provide new insights to the fatigue performance of the FRAC.
{"title":"Fatigue Performance Test and Life Calculation of Fiber-Reinforced Asphalt Concrete","authors":"Meng Fenglin, Danying Gao, Faqi Chen, Chunshui Huang","doi":"10.18280/acsm.440209","DOIUrl":"https://doi.org/10.18280/acsm.440209","url":null,"abstract":"Received: 17 December 2019 Accepted: 25 February 2020 This paper aims to accurately measure the fatigue performance and calculate the fatigue life of fiber-reinforced asphalt concrete (FRAC). Firstly, splitting fatigue tests were conducted under the stress control mode. Through the tests, the attenuation features of the FRAC stiffness modulus were analyzed with different fiber contents and length-todiameter ratios. Drawing on damage mechanics theory, a fatigue failure criterion was put forward for the FRAC. Based on stress ratiofatigue life (S-N) equation, the authors established a calculation model for fatigue life of the FRAC, in the light of the characteristic parameter of fiber content (FCCP). The results show that, the FCCP can reflect the combined effect of fiber content and length-to-diameter ratio on the fatigue performance of the FRAC; With the growth of the FCCP, the FRAC fatigue life always increased first and then decreased; The FRAC realized the longest fatigue life, and achieved the best fatigue performance at the FCCP of 1.13; For AC-13 polyester FRAC (PFAC), the fiber content, length-to-diameter ratio, and the FCCP were optimized as 0.35%, 324, and 1.13, respectively. The research results provide new insights to the fatigue performance of the FRAC.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"59 1","pages":"133-139"},"PeriodicalIF":0.8,"publicationDate":"2020-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80452261","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}
Received: 10 November 2019 Accepted: 17 January 2020 This paper aims to disclose the working performance and mechanical performance of recycled concrete made from polypropylene fiber and artificial sand (P-RCAS). Taking fiber content and concrete strength as variables, a total of 90 P-RCAS cubes and prisms were designed and prepared for axial loading tests. The working performance of the PRCAS was tested, the failure process and failure mode of the specimens were observed, and the compressive strengths of cubs and prisms were measured. Moreover, the authors probed deep into how fiber content affect the working performance and mechanical performance of the P-RCAS. The results show that adding polypropylene fiber into the artificial sand recycled concrete (RCAS) can produce concrete with good workability; the additional fibers help to enhance the compressive strength of RCAS specimens on all strength levels, but the enhancement was insignificantly for specimens on high strength levels. Finally, the test data were used to fit the calculation formulas for fiber content, water-cement ratio, and compressive strength, as well as the relationship between axial compressive strength and cube compressive strength. The research results provide reference for further research and engineering application of the RCAS.
{"title":"Experimental Analysis on Mechanical Performance of Recycled Concrete Made from Polypropylene Fiber and Artificial Sand","authors":"Huan Luo, F. Ma, Qian-kun Yang","doi":"10.18280/acsm.440204","DOIUrl":"https://doi.org/10.18280/acsm.440204","url":null,"abstract":"Received: 10 November 2019 Accepted: 17 January 2020 This paper aims to disclose the working performance and mechanical performance of recycled concrete made from polypropylene fiber and artificial sand (P-RCAS). Taking fiber content and concrete strength as variables, a total of 90 P-RCAS cubes and prisms were designed and prepared for axial loading tests. The working performance of the PRCAS was tested, the failure process and failure mode of the specimens were observed, and the compressive strengths of cubs and prisms were measured. Moreover, the authors probed deep into how fiber content affect the working performance and mechanical performance of the P-RCAS. The results show that adding polypropylene fiber into the artificial sand recycled concrete (RCAS) can produce concrete with good workability; the additional fibers help to enhance the compressive strength of RCAS specimens on all strength levels, but the enhancement was insignificantly for specimens on high strength levels. Finally, the test data were used to fit the calculation formulas for fiber content, water-cement ratio, and compressive strength, as well as the relationship between axial compressive strength and cube compressive strength. The research results provide reference for further research and engineering application of the RCAS.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"24 1","pages":"97-102"},"PeriodicalIF":0.8,"publicationDate":"2020-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73514892","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}
Received: 5 Decemebr 2019 Accepted: 19 February 2020 High-entropy alloys (HEAs) are alloys that are formed by mixing equal or relatively large proportions of (usually) five or more elements. Development of high entropy material is one of the biggest challenging areas in materials and design. However, high entropy materials exhibit very good mechanical properties. In the present investigation, an attempt was made to develop high entropy material by simple casting technique using Cr, Mn, Fe, Al and Ni with equal weight percent. Squeeze pressure was applied on developed Cr0.20Mn0.20Fe0.20Al0.20Ni0.20 high entropy alloy to eliminate porosity and improve the grain structure. Microstructure image of Cr0.20Mn0.20Fe0.20Al0.20Ni0.20 showed fair interfacial bonding between the alloys after squeeze pressure. Tensile strength, hardness was significantly improved of developed high entropy material. Physical and thermal behaviour such as corrosion loss and material sustainability were also observed to see the effect of different alloys interfacial reaction layer.
{"title":"Physical, Mechanical and Thermal Behaviour of High Entropy Materials","authors":"Piyush Sharma, S. Dwivedi, V. Dwivedi","doi":"10.18280/acsm.440208","DOIUrl":"https://doi.org/10.18280/acsm.440208","url":null,"abstract":"Received: 5 Decemebr 2019 Accepted: 19 February 2020 High-entropy alloys (HEAs) are alloys that are formed by mixing equal or relatively large proportions of (usually) five or more elements. Development of high entropy material is one of the biggest challenging areas in materials and design. However, high entropy materials exhibit very good mechanical properties. In the present investigation, an attempt was made to develop high entropy material by simple casting technique using Cr, Mn, Fe, Al and Ni with equal weight percent. Squeeze pressure was applied on developed Cr0.20Mn0.20Fe0.20Al0.20Ni0.20 high entropy alloy to eliminate porosity and improve the grain structure. Microstructure image of Cr0.20Mn0.20Fe0.20Al0.20Ni0.20 showed fair interfacial bonding between the alloys after squeeze pressure. Tensile strength, hardness was significantly improved of developed high entropy material. Physical and thermal behaviour such as corrosion loss and material sustainability were also observed to see the effect of different alloys interfacial reaction layer.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"26 1","pages":"127-132"},"PeriodicalIF":0.8,"publicationDate":"2020-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90651931","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}
Mohammed-Amin Boumehraz, M. Mellas, Kamel Goudjil, Farida Boucetta
1 Laboratory of Research in Civil Engineering (LRCE), University of Biskra, BP 145 RP, Biskra 07000, Algeria 2 Department of Civil Engineering, University of Biskra, BP 145 RP, Biskra 07000, Algeria 3 Laboratory of Civil Engineering and Environment (LCEE), University of Jijel, Jijel 18000, Algeria 4 Laboratory of Physics of Thin Films and Applications, University of Biskra, BP 145 RP, Biskra 07000, Algeria
{"title":"Study of the Aging of a Concrete Reinforced by Alkali Resistant Glass Fiber in the Wet Environment","authors":"Mohammed-Amin Boumehraz, M. Mellas, Kamel Goudjil, Farida Boucetta","doi":"10.18280/acsm.440202","DOIUrl":"https://doi.org/10.18280/acsm.440202","url":null,"abstract":"1 Laboratory of Research in Civil Engineering (LRCE), University of Biskra, BP 145 RP, Biskra 07000, Algeria 2 Department of Civil Engineering, University of Biskra, BP 145 RP, Biskra 07000, Algeria 3 Laboratory of Civil Engineering and Environment (LCEE), University of Jijel, Jijel 18000, Algeria 4 Laboratory of Physics of Thin Films and Applications, University of Biskra, BP 145 RP, Biskra 07000, Algeria","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"24 1","pages":"85-90"},"PeriodicalIF":0.8,"publicationDate":"2020-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91223126","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}
Received: 18 December 2019 Accepted: 21 February 2020 The paper shows the reasons for the growing demand for pipes made of materials with special properties, which include Ni-base alloy CrNi60WoTi. The article is dedicated to results of complex research of opportunity to improve outside surface quality of Ni-base alloy hot extruded pipe. The paper presents analysis of scientific and technical information to determinate the characteristic features of deformation of Ni-based alloys. In work presents the results of plastometric research of samples of metal from an alloy CrNi60WoTi, which made it possible to receive data of value of deformation resistance. According to the results of plastometric tests at the Gleeble 3800 thermo-mechanical process simulator using the module Hydrawedge, metal flow curves were constructed. Using the selected dependence in the work, an approximation of the experimental data is shown based on this information, in the article presents results of calculation technological parameters of pipe extrusion process. This information was used on the factory to product of pilot industrial batch of pipes with an improved quality of outside surface that meets the requirements of Technical conditions (TC) 14-3R-85 without turning the outer surface.
{"title":"Improving of Manufacturing of Hot-Extruded Pipes from Ni-Based Alloys","authors":"Y. Kosmatskiy, D. Lysov, N. Fokin, V. Nikolenko","doi":"10.18280/acsm.440201","DOIUrl":"https://doi.org/10.18280/acsm.440201","url":null,"abstract":"Received: 18 December 2019 Accepted: 21 February 2020 The paper shows the reasons for the growing demand for pipes made of materials with special properties, which include Ni-base alloy CrNi60WoTi. The article is dedicated to results of complex research of opportunity to improve outside surface quality of Ni-base alloy hot extruded pipe. The paper presents analysis of scientific and technical information to determinate the characteristic features of deformation of Ni-based alloys. In work presents the results of plastometric research of samples of metal from an alloy CrNi60WoTi, which made it possible to receive data of value of deformation resistance. According to the results of plastometric tests at the Gleeble 3800 thermo-mechanical process simulator using the module Hydrawedge, metal flow curves were constructed. Using the selected dependence in the work, an approximation of the experimental data is shown based on this information, in the article presents results of calculation technological parameters of pipe extrusion process. This information was used on the factory to product of pilot industrial batch of pipes with an improved quality of outside surface that meets the requirements of Technical conditions (TC) 14-3R-85 without turning the outer surface.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"71 1","pages":"79-84"},"PeriodicalIF":0.8,"publicationDate":"2020-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83340159","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}
Received: 11 December 2019 Accepted: 6 February 2020 The objective of this work is to develop Co3O4 films and to investigate the influence of different precursor concentration on the structural, morphological, optical and electrical properties of Co3O4 thin films, in order to improve the optoelectronic properties of these films. Finally, we have developed thin films of Co3O4 at different precursor concentrations (0.05 to 0.15 mol/l) under a substrate temperature set to 400°C and 4 minutes as deposition time. XRD analysis has shown that the deposited layers have a cubic spinel structure with a preferential orientation along the direction (311). The morphological studies have shown that the surface morphology of the films was almost homogeneous and dense. The presence of the peaks associated with the Co and O elements, which were present in the EDS analysis, confirmed the composition of the films. The optical characterization of our film has shown a low transmittance (from 16 to 0.9%) in the visible region and the IR region varies between 40 to 2% over the range of precursor concentration varied between 0.05 and 0.125 mol/l and a high absorbance of the order of 100% for the film deposit of 0.15 mol/l. The obtained gap values are ranged from 1.44 to 1.52 eV and 2.05 to 2 eV for lower and higher energy regions in the range of precursor concentration 0.05–0.125 mol/l. The film prepared at 0.15 mol/l, had a good p-type electrical semiconductor and good absorbance of sunlight.
{"title":"Experimental Study of Precursor Concentration the Co3O4 Thin Films Used as Solar Absorbers","authors":"W. Daranfed, N. Guermat, K. Mirouh","doi":"10.18280/acsm.440207","DOIUrl":"https://doi.org/10.18280/acsm.440207","url":null,"abstract":"Received: 11 December 2019 Accepted: 6 February 2020 The objective of this work is to develop Co3O4 films and to investigate the influence of different precursor concentration on the structural, morphological, optical and electrical properties of Co3O4 thin films, in order to improve the optoelectronic properties of these films. Finally, we have developed thin films of Co3O4 at different precursor concentrations (0.05 to 0.15 mol/l) under a substrate temperature set to 400°C and 4 minutes as deposition time. XRD analysis has shown that the deposited layers have a cubic spinel structure with a preferential orientation along the direction (311). The morphological studies have shown that the surface morphology of the films was almost homogeneous and dense. The presence of the peaks associated with the Co and O elements, which were present in the EDS analysis, confirmed the composition of the films. The optical characterization of our film has shown a low transmittance (from 16 to 0.9%) in the visible region and the IR region varies between 40 to 2% over the range of precursor concentration varied between 0.05 and 0.125 mol/l and a high absorbance of the order of 100% for the film deposit of 0.15 mol/l. The obtained gap values are ranged from 1.44 to 1.52 eV and 2.05 to 2 eV for lower and higher energy regions in the range of precursor concentration 0.05–0.125 mol/l. The film prepared at 0.15 mol/l, had a good p-type electrical semiconductor and good absorbance of sunlight.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"100 9 1","pages":"121-126"},"PeriodicalIF":0.8,"publicationDate":"2020-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83330862","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}
Fatiha Bouhadjela, Bourassia Bensaad, R. Cheriet, M. Belharizi, S. Belhenini
Received: 20 September 2019 Accepted: 26 December 2019 The mechanical and thermal contact behaviour between two solids depends mainly on the contact geometry and the nature of these two solids. It is concluded that for rough surfaces in plastic contact the real contact is affected by the materials hardness, the surfaces roughness and the evolution of the mechanical contact deformation. The aim of the present study is to compare results obtained from experimental work on Vickers hardness of brass to those of the real contact pressure (RCP) obtained by numeric simulation. Hardness and RCP have been selected as physical quantities. For the numerical simulation, three three-dimensional element models are developed; firstly, we simulated Vickers assay using rigid indentor and a deformed plane surface of brass. In the second model we considered a brass indenter in contact with hard plane surface. The dimensions of the second model were changed to create the third model. The obtained results from the numeric models were in agreement with the experimental findings and confirmed the hypothesis of Abbott and Firstone. The three models of simulation may help to select the model that give the best results in short time.
{"title":"Contribution to the Study of Plastic Mechanics Models of Solid-Solid Contacts","authors":"Fatiha Bouhadjela, Bourassia Bensaad, R. Cheriet, M. Belharizi, S. Belhenini","doi":"10.18280/acsm.440105","DOIUrl":"https://doi.org/10.18280/acsm.440105","url":null,"abstract":"Received: 20 September 2019 Accepted: 26 December 2019 The mechanical and thermal contact behaviour between two solids depends mainly on the contact geometry and the nature of these two solids. It is concluded that for rough surfaces in plastic contact the real contact is affected by the materials hardness, the surfaces roughness and the evolution of the mechanical contact deformation. The aim of the present study is to compare results obtained from experimental work on Vickers hardness of brass to those of the real contact pressure (RCP) obtained by numeric simulation. Hardness and RCP have been selected as physical quantities. For the numerical simulation, three three-dimensional element models are developed; firstly, we simulated Vickers assay using rigid indentor and a deformed plane surface of brass. In the second model we considered a brass indenter in contact with hard plane surface. The dimensions of the second model were changed to create the third model. The obtained results from the numeric models were in agreement with the experimental findings and confirmed the hypothesis of Abbott and Firstone. The three models of simulation may help to select the model that give the best results in short time.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"5 1","pages":"37-42"},"PeriodicalIF":0.8,"publicationDate":"2020-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88819454","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}
Chaima Zouzou, M. Keddam, B. Bouarour, A. Piasecki, A. Miklaszewski, M. Kulka
Received: 18 August 2019 Accepted: 5 November 2019 The aim of the present study is to generate the boride coatings at the surface of the lamellar gray cast iron (EN-GJL-250). This material was hardened by pack-boriding in the powders mixture of 50% B4C, 49.5% Al2O3 and 0.5% AlF3 at 800, 900 and 1000°C for 4, 6 and 8 h. The produced borided layers were characterized by Scanning electron microscopy (SEM) and XRD analysis. The boriding kinetics of EN-GJL-250 lamellar gray cast iron was also investigated. Based on the experimental data, the value of activation energy for boron diffusion was calculated as 163.86 kJ mol-1 for the EN-GJL250 cast iron by using the integral diffusion model. The regression model based on the design of experiments (DOE) was also employed in order to predict the total boride layer thickness as a function of boriding parameters (the treatment time and the boriding temperature). The experimental values of total boride layer thickness were in agreement with the results from the regression model.
{"title":"Characterization and Boronizing Kinetics of EN-GJL-250 Lamellar Gray Cast Iron","authors":"Chaima Zouzou, M. Keddam, B. Bouarour, A. Piasecki, A. Miklaszewski, M. Kulka","doi":"10.18280/acsm.440103","DOIUrl":"https://doi.org/10.18280/acsm.440103","url":null,"abstract":"Received: 18 August 2019 Accepted: 5 November 2019 The aim of the present study is to generate the boride coatings at the surface of the lamellar gray cast iron (EN-GJL-250). This material was hardened by pack-boriding in the powders mixture of 50% B4C, 49.5% Al2O3 and 0.5% AlF3 at 800, 900 and 1000°C for 4, 6 and 8 h. The produced borided layers were characterized by Scanning electron microscopy (SEM) and XRD analysis. The boriding kinetics of EN-GJL-250 lamellar gray cast iron was also investigated. Based on the experimental data, the value of activation energy for boron diffusion was calculated as 163.86 kJ mol-1 for the EN-GJL250 cast iron by using the integral diffusion model. The regression model based on the design of experiments (DOE) was also employed in order to predict the total boride layer thickness as a function of boriding parameters (the treatment time and the boriding temperature). The experimental values of total boride layer thickness were in agreement with the results from the regression model.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"25 1","pages":"23-28"},"PeriodicalIF":0.8,"publicationDate":"2020-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85602936","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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