Pub Date : 2019-01-01DOI: 10.1504/ijcmsse.2019.10026438
Lukman N. Abdulkadir, Khaled Abou El Hossein, M. Liman, Odedeyi Peter Babatunde, Abubakar I. Jumare
{"title":"Molecular dynamic study of combined effects of diamond tool rake angle and duncut/Redge ratio on nanomachining behaviour of monocrystalline optical silicon","authors":"Lukman N. Abdulkadir, Khaled Abou El Hossein, M. Liman, Odedeyi Peter Babatunde, Abubakar I. Jumare","doi":"10.1504/ijcmsse.2019.10026438","DOIUrl":"https://doi.org/10.1504/ijcmsse.2019.10026438","url":null,"abstract":"","PeriodicalId":39426,"journal":{"name":"International Journal of Computational Materials Science and Surface Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66724342","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 : 2019-01-01DOI: 10.1504/ijcmsse.2019.10026435
I. Manivannan, S. Ranganathan, S. Gopalakannan, S. Suresh, D. Candane
The newly engineered metal matrix nanocomposite (MMNC) of Al6061 reinforced with 0.4 wt% SiC and 0.5 wt% Gr hybrid nanocomposites were synthesised by ultrasonic assisted stir casting method. The pin-on-disc equipment were conducted on the prepared samples to investigate the tribological behaviour of the hybrid nanocomposite. The hybrid nanocomposite and wear surfaces have been characterised by field emission scanning electron microscope (FESEM) equipped with an energy dispersive spectrometer (EDS), optical microscope (OM) and 3D profilometer to understand the wear mechanisms. This study shows the effectiveness of incorporation of graphite in the hybrid nanocomposite for reduction of friction, wear and surface roughness. With the introduction of nano SiC and Gr particles into matrix alloy, the number and depth of grooves in worn surface of hybrid nanocomposites decreased. The Al/0.4SiC/0.5Gr hybrid nanocomposite showed superior tribological properties and self-lubricating ability compared to the matrix alloy.
{"title":"Mechanical and wear surface characterisation of aluminium hybrid nanocomposite","authors":"I. Manivannan, S. Ranganathan, S. Gopalakannan, S. Suresh, D. Candane","doi":"10.1504/ijcmsse.2019.10026435","DOIUrl":"https://doi.org/10.1504/ijcmsse.2019.10026435","url":null,"abstract":"The newly engineered metal matrix nanocomposite (MMNC) of Al6061 reinforced with 0.4 wt% SiC and 0.5 wt% Gr hybrid nanocomposites were synthesised by ultrasonic assisted stir casting method. The pin-on-disc equipment were conducted on the prepared samples to investigate the tribological behaviour of the hybrid nanocomposite. The hybrid nanocomposite and wear surfaces have been characterised by field emission scanning electron microscope (FESEM) equipped with an energy dispersive spectrometer (EDS), optical microscope (OM) and 3D profilometer to understand the wear mechanisms. This study shows the effectiveness of incorporation of graphite in the hybrid nanocomposite for reduction of friction, wear and surface roughness. With the introduction of nano SiC and Gr particles into matrix alloy, the number and depth of grooves in worn surface of hybrid nanocomposites decreased. The Al/0.4SiC/0.5Gr hybrid nanocomposite showed superior tribological properties and self-lubricating ability compared to the matrix alloy.","PeriodicalId":39426,"journal":{"name":"International Journal of Computational Materials Science and Surface Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66723506","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 : 2019-01-01DOI: 10.1504/ijcmsse.2019.104694
R. Hanumantharaya, I. Sogalad, S. Basavarajappa, G. C. Patel
In recent past, adhesive bonding gain much attention world-wide in joining of engineered parts namely, automotive and aerospace structures. The strength of adhesive bonded composite joints is studied by conducting experiments based on the matrices of central composite design. The collected data was analysed using response surface methodology. The mathematical model was established to express the load carrying capacity and joint strength as a function of input variables. Further, analysis of variance was carried out to ensure good fit to the experimental data. Moreover, the statistical methods determine significant interaction effects among the factors. Finally, genetic algorithm was used to locate the optimum points of joint strength for the set of inputs, i.e., 40 mm overlap length, 0.2 mm adhesive thickness and 4.526 μm surface roughness. The results showed that adhesively bonded single lap joints strength was influenced by overlap length (8%), adhesive thickness (78.56%), and surface roughness (1.43%). Statistical experimental design techniques were found to be useful in understanding the complex relationships seen in the data, and also in interpreting the results.
{"title":"Modelling and optimisation of adhesive bonded joint strength of composites for aerospace applications","authors":"R. Hanumantharaya, I. Sogalad, S. Basavarajappa, G. C. Patel","doi":"10.1504/ijcmsse.2019.104694","DOIUrl":"https://doi.org/10.1504/ijcmsse.2019.104694","url":null,"abstract":"In recent past, adhesive bonding gain much attention world-wide in joining of engineered parts namely, automotive and aerospace structures. The strength of adhesive bonded composite joints is studied by conducting experiments based on the matrices of central composite design. The collected data was analysed using response surface methodology. The mathematical model was established to express the load carrying capacity and joint strength as a function of input variables. Further, analysis of variance was carried out to ensure good fit to the experimental data. Moreover, the statistical methods determine significant interaction effects among the factors. Finally, genetic algorithm was used to locate the optimum points of joint strength for the set of inputs, i.e., 40 mm overlap length, 0.2 mm adhesive thickness and 4.526 μm surface roughness. The results showed that adhesively bonded single lap joints strength was influenced by overlap length (8%), adhesive thickness (78.56%), and surface roughness (1.43%). Statistical experimental design techniques were found to be useful in understanding the complex relationships seen in the data, and also in interpreting the results.","PeriodicalId":39426,"journal":{"name":"International Journal of Computational Materials Science and Surface Engineering","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/ijcmsse.2019.104694","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66724355","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 : 2019-01-01DOI: 10.1504/ijcmsse.2019.10023224
Yawei Peng, J. Gong, Yong Jiang, D. Rong, Minghui Fu
{"title":"Numerical analysis of stress-induced and concentration-dependent carbon diffusion in low-temperature surface carburisation of 316L stainless steel","authors":"Yawei Peng, J. Gong, Yong Jiang, D. Rong, Minghui Fu","doi":"10.1504/ijcmsse.2019.10023224","DOIUrl":"https://doi.org/10.1504/ijcmsse.2019.10023224","url":null,"abstract":"","PeriodicalId":39426,"journal":{"name":"International Journal of Computational Materials Science and Surface Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66723455","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 : 2019-01-01DOI: 10.1504/ijcmsse.2019.10026437
C. Rajendran, R. Guru, S. Kavin, P. Navanithan, P. N. Kalathil
Friction stir welding (FSW) is a promising solid-state welding process for precipitation hardening and high strength aluminium alloys. An experimental and theoretical investigation was carried out to check the significance of tool rotation speed on microstructural characteristics and tensile properties of high-strength alloy AA2014. FSW joints were made with varying tool rotation speed from 1,100 rpm to 1,900 rpm with an equal increment of 200 rpm, while the other parameters such as welding speed, shoulder diameter and tool tilt angle were kept constant. The strength of FSW joints was correlated with microhardness, microstructure and fractographs. The joint fabricated with the tool rotation speed of 1,500 rpm, welding speed of 50 mm/min, shoulder diameter of 6 mm and tool tilt angle of 1.5° exhibited superior strength (376 MPa) than the other joints. It could be achieved by the balanced flow of material and defect-free in the stir zone.
{"title":"Influence of tool rotation speed on microstructural characteristics and mechanical properties of friction stir welded AA2014-T6 aluminium alloy","authors":"C. Rajendran, R. Guru, S. Kavin, P. Navanithan, P. N. Kalathil","doi":"10.1504/ijcmsse.2019.10026437","DOIUrl":"https://doi.org/10.1504/ijcmsse.2019.10026437","url":null,"abstract":"Friction stir welding (FSW) is a promising solid-state welding process for precipitation hardening and high strength aluminium alloys. An experimental and theoretical investigation was carried out to check the significance of tool rotation speed on microstructural characteristics and tensile properties of high-strength alloy AA2014. FSW joints were made with varying tool rotation speed from 1,100 rpm to 1,900 rpm with an equal increment of 200 rpm, while the other parameters such as welding speed, shoulder diameter and tool tilt angle were kept constant. The strength of FSW joints was correlated with microhardness, microstructure and fractographs. The joint fabricated with the tool rotation speed of 1,500 rpm, welding speed of 50 mm/min, shoulder diameter of 6 mm and tool tilt angle of 1.5° exhibited superior strength (376 MPa) than the other joints. It could be achieved by the balanced flow of material and defect-free in the stir zone.","PeriodicalId":39426,"journal":{"name":"International Journal of Computational Materials Science and Surface Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66723533","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 : 2019-01-01DOI: 10.1504/ijcmsse.2019.10026436
V. Kalyankar, Nitin Chouhan
Experimental investigation on resistance spot welding of 904L super austenitic stainless steel, which is finding its considerable applicability in automobile sector, is presented in this work. However, joining of this material involves difficulties due to complex working range of process parameters leading to critical mechanical and metallurgical changes in the weld joint. More focus is given on effect of important process parameters like weld time, current, electrode pressure and squeeze time on strength of weld joint. A mathematical model is proposed to understand the combined effect of multiple processing parameters on tensile shear strength (TSS) which can be beneficial to scientific community to get enhanced results. For the present setup, more significant parameter is electrode pressure followed by other parameters. TSS decreases with increase in electrode pressure up to certain level and then starts increasing while TSS increases with increase in squeeze time and subsequently it remains constant.
{"title":"Effect of weld parameters on joint strength of 904L grade steel using resistance spot welding","authors":"V. Kalyankar, Nitin Chouhan","doi":"10.1504/ijcmsse.2019.10026436","DOIUrl":"https://doi.org/10.1504/ijcmsse.2019.10026436","url":null,"abstract":"Experimental investigation on resistance spot welding of 904L super austenitic stainless steel, which is finding its considerable applicability in automobile sector, is presented in this work. However, joining of this material involves difficulties due to complex working range of process parameters leading to critical mechanical and metallurgical changes in the weld joint. More focus is given on effect of important process parameters like weld time, current, electrode pressure and squeeze time on strength of weld joint. A mathematical model is proposed to understand the combined effect of multiple processing parameters on tensile shear strength (TSS) which can be beneficial to scientific community to get enhanced results. For the present setup, more significant parameter is electrode pressure followed by other parameters. TSS decreases with increase in electrode pressure up to certain level and then starts increasing while TSS increases with increase in squeeze time and subsequently it remains constant.","PeriodicalId":39426,"journal":{"name":"International Journal of Computational Materials Science and Surface Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66723520","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 : 2019-01-01DOI: 10.1504/ijcmsse.2019.10023123
V. Murugesan, A. Perumal
{"title":"Comparison of RSM and ANN model in the prediction of the tensile shear failure load of spot welded AISI 304 /316 L dissimilar sheets","authors":"V. Murugesan, A. Perumal","doi":"10.1504/ijcmsse.2019.10023123","DOIUrl":"https://doi.org/10.1504/ijcmsse.2019.10023123","url":null,"abstract":"","PeriodicalId":39426,"journal":{"name":"International Journal of Computational Materials Science and Surface Engineering","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66723882","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 : 2019-01-01DOI: 10.1504/ijcmsse.2019.104701
Debasis Das, R. Verma, Vipul Pathak
The multi-layered YSZ, NiCoCrAlY, Cr2O3 and Al2O3 coatings of varying thickness (200 μm-400 μm) have been investigated for thermal barrier coating (TBC) application. Plasma spray technique has been utilised on piston crown to optimise the thermal fatigue life in view to reduce the heat losses. Four types of TBC overlay each with a 100 μm NiCrAlY bond coat were deposited on the A336 aluminium alloy substrate cut out of the diesel engine piston. The phase composition of coatings before and after the thermal shock testing was analysed by XRD and the lattice strain analysis was performed by Williamson-Hall analysis. It was observed that among the considered multi-layered coating configurations, those with 300 μm YSZ and 200 μm Cr2O3 top coat exhibited acceptable thermal shock resistance as the specimens sustain up to 298 and 325 thermal cycles respectively. The microstructural analysis suggested against the formation of any major deformity or structural changes at the higher temperature as investigated by thermal shock experiment.
{"title":"Thermo-mechanical evaluation of plasma sprayed YSZ-based multi-layered thermal barrier coatings","authors":"Debasis Das, R. Verma, Vipul Pathak","doi":"10.1504/ijcmsse.2019.104701","DOIUrl":"https://doi.org/10.1504/ijcmsse.2019.104701","url":null,"abstract":"The multi-layered YSZ, NiCoCrAlY, Cr2O3 and Al2O3 coatings of varying thickness (200 μm-400 μm) have been investigated for thermal barrier coating (TBC) application. Plasma spray technique has been utilised on piston crown to optimise the thermal fatigue life in view to reduce the heat losses. Four types of TBC overlay each with a 100 μm NiCrAlY bond coat were deposited on the A336 aluminium alloy substrate cut out of the diesel engine piston. The phase composition of coatings before and after the thermal shock testing was analysed by XRD and the lattice strain analysis was performed by Williamson-Hall analysis. It was observed that among the considered multi-layered coating configurations, those with 300 μm YSZ and 200 μm Cr2O3 top coat exhibited acceptable thermal shock resistance as the specimens sustain up to 298 and 325 thermal cycles respectively. The microstructural analysis suggested against the formation of any major deformity or structural changes at the higher temperature as investigated by thermal shock experiment.","PeriodicalId":39426,"journal":{"name":"International Journal of Computational Materials Science and Surface Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/ijcmsse.2019.104701","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66724364","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 : 2019-01-01DOI: 10.1504/ijcmsse.2019.10026432
M. Liman, K. Abou-El-Hossein, Lukman N. Abdulkadir, P. B. Odedeyi, Abubakar I. Jumare
This paper studies the effect of cutting parameters on surface generation in ultra-precision turning of a contact lens polymer. Contact lens manufacture wants high accuracy and high surface quality. Surface roughness is mostly used to measure the index quality of a turning process. It has been an important response because it has direct influence toward the part performance and the production cost. Hence, choosing optimal cutting parameters will not only improve the quality measure but also the productivity. This research work is therefore aimed at investigating the effect of cutting parameters (cutting speed, feed rate and depth of cut) on surface roughness of RGP ONSI-56 contact lens polymer with a monocrystalline diamond cutting tool. In this work, cutting speed (A) is found to be the most dominant factor having the highest degree of significance followed by the square of the cutting speed (A2) and the feed rate (B). However, interaction between cutting speed and feed rate (AB) has the lowest degree of significance on the surface roughness.
{"title":"Effect of cutting parameters on surface roughness in ultra-high precision turning of a contact lens polymer","authors":"M. Liman, K. Abou-El-Hossein, Lukman N. Abdulkadir, P. B. Odedeyi, Abubakar I. Jumare","doi":"10.1504/ijcmsse.2019.10026432","DOIUrl":"https://doi.org/10.1504/ijcmsse.2019.10026432","url":null,"abstract":"This paper studies the effect of cutting parameters on surface generation in ultra-precision turning of a contact lens polymer. Contact lens manufacture wants high accuracy and high surface quality. Surface roughness is mostly used to measure the index quality of a turning process. It has been an important response because it has direct influence toward the part performance and the production cost. Hence, choosing optimal cutting parameters will not only improve the quality measure but also the productivity. This research work is therefore aimed at investigating the effect of cutting parameters (cutting speed, feed rate and depth of cut) on surface roughness of RGP ONSI-56 contact lens polymer with a monocrystalline diamond cutting tool. In this work, cutting speed (A) is found to be the most dominant factor having the highest degree of significance followed by the square of the cutting speed (A2) and the feed rate (B). However, interaction between cutting speed and feed rate (AB) has the lowest degree of significance on the surface roughness.","PeriodicalId":39426,"journal":{"name":"International Journal of Computational Materials Science and Surface Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66723471","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 : 2018-10-04DOI: 10.1504/IJCMSSE.2018.10016536
Z. Liu
Sheet rolling is a simple plastic deformation of which, there are many formulas to describe its bite condition, however, there is no rigorous theoretical analysis and result and the applying ranges of these formulas are limited. Although the bite condition is not an important problem in engineering or academy, it is really a term influenced by many factors and it is difficult, maybe impossible to be expressed by an equation. In this paper, by finite element software, the bite condition or the critical friction factor under different thicknesses of AZ31 sheet, rolling reduction, sheet temperature and roller temperature are calculated and with large result data, the change regulation of the bite condition appears which is shown in a colour brick model. This example shows that, avoiding rigorous theoretical analysis, a complex situation can be numerically illustrated well by finite element software.
{"title":"Simulation of the bite condition of AZ31 sheet rolling","authors":"Z. Liu","doi":"10.1504/IJCMSSE.2018.10016536","DOIUrl":"https://doi.org/10.1504/IJCMSSE.2018.10016536","url":null,"abstract":"Sheet rolling is a simple plastic deformation of which, there are many formulas to describe its bite condition, however, there is no rigorous theoretical analysis and result and the applying ranges of these formulas are limited. Although the bite condition is not an important problem in engineering or academy, it is really a term influenced by many factors and it is difficult, maybe impossible to be expressed by an equation. In this paper, by finite element software, the bite condition or the critical friction factor under different thicknesses of AZ31 sheet, rolling reduction, sheet temperature and roller temperature are calculated and with large result data, the change regulation of the bite condition appears which is shown in a colour brick model. This example shows that, avoiding rigorous theoretical analysis, a complex situation can be numerically illustrated well by finite element software.","PeriodicalId":39426,"journal":{"name":"International Journal of Computational Materials Science and Surface Engineering","volume":"7 1","pages":"263"},"PeriodicalIF":0.0,"publicationDate":"2018-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49099864","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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