Effect of Co distribution on plastic deformation of nanocrystalline Al-10.2 at.% Co alloy
Molecular dynamics is employed to study stress-strain curves obtained during high strain rate deformation of nanocrystalline Al-10.2 at.% Co alloy with (i) randomly distributed Co atoms (Al-Co substitutional solid solution) and (ii) Co atoms segregated in grain boundaries (GBs) of the alloy. The eff...
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sg-ntu-dr.10356-1070612020-09-26T22:11:13Z Effect of Co distribution on plastic deformation of nanocrystalline Al-10.2 at.% Co alloy Babicheva, Rita I. Dmitriev, Sergey V. Zhang, Ying Kok, Shaw Wei Zhou, Kun School of Mechanical and Aerospace Engineering A*STAR SIMTech DRNTU::Engineering::Materials::Nanostructured materials Molecular dynamics is employed to study stress-strain curves obtained during high strain rate deformation of nanocrystalline Al-10.2 at.% Co alloy with (i) randomly distributed Co atoms (Al-Co substitutional solid solution) and (ii) Co atoms segregated in grain boundaries (GBs) of the alloy. The effect of Co distribution, deformation temperature, and the presence of hydrostatic pressure on the stress-strain relation is analyzed. The results are compared to that for nanocrystalline pure Al. It is found that the strength of the Al-Co solid solution is lower than that of the pure Al, while GB segregations of Co increase its strength. The alloys, regardless of the type of Co distribution, under shear loading with no hydrostatic pressure demonstrate higher ductility in comparison with the pure Al. The shear modulus of the Al-Co alloy with the GB segregations is noticeably larger than that of the pure Al and the Al-Co solid solution in a wide range of temperatures. The results of the study show that the GB segregations of Co can have a positive effect on the mechanical properties of nanocrystalline Al. Published version 2015-03-24T06:40:59Z 2019-12-06T22:24:01Z 2015-03-24T06:40:59Z 2019-12-06T22:24:01Z 2015 2015 Journal Article Babicheva, R. I., Dmitriev, S. V., Zhang, Y., Kok, S. W., & Zhou, K. (2015). Effect of Co distribution on plastic deformation of nanocrystalline Al-10.2 at.% Co alloy. Journal of nanomaterials, 2015, 1-8. https://hdl.handle.net/10356/107061 http://hdl.handle.net/10220/25264 10.1155/2015/231848 en Journal of nanomaterials © 2015 Rita I. Babicheva et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 9 p. application/pdf |
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DRNTU::Engineering::Materials::Nanostructured materials Babicheva, Rita I. Dmitriev, Sergey V. Zhang, Ying Kok, Shaw Wei Zhou, Kun Effect of Co distribution on plastic deformation of nanocrystalline Al-10.2 at.% Co alloy |
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Molecular dynamics is employed to study stress-strain curves obtained during high strain rate deformation of nanocrystalline Al-10.2 at.% Co alloy with (i) randomly distributed Co atoms (Al-Co substitutional solid solution) and (ii) Co atoms segregated in grain boundaries (GBs) of the alloy. The effect of Co distribution, deformation temperature, and the presence of hydrostatic pressure on the stress-strain relation is analyzed. The results are compared to that for nanocrystalline pure Al. It is found that the strength of the Al-Co solid solution is lower than that of the pure Al, while GB segregations of Co increase its strength. The alloys, regardless of the type of Co distribution, under shear loading with no hydrostatic pressure demonstrate higher ductility in comparison with the pure Al. The shear modulus of the Al-Co alloy with the GB segregations is noticeably larger than that of the pure Al and the Al-Co solid solution in a wide range of temperatures. The results of the study show that the GB segregations of Co can have a positive effect on the mechanical properties of nanocrystalline Al. |
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School of Mechanical and Aerospace Engineering |
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School of Mechanical and Aerospace Engineering Babicheva, Rita I. Dmitriev, Sergey V. Zhang, Ying Kok, Shaw Wei Zhou, Kun |
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Article |
author |
Babicheva, Rita I. Dmitriev, Sergey V. Zhang, Ying Kok, Shaw Wei Zhou, Kun |
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Babicheva, Rita I. |
title |
Effect of Co distribution on plastic deformation of nanocrystalline Al-10.2 at.% Co alloy |
title_short |
Effect of Co distribution on plastic deformation of nanocrystalline Al-10.2 at.% Co alloy |
title_full |
Effect of Co distribution on plastic deformation of nanocrystalline Al-10.2 at.% Co alloy |
title_fullStr |
Effect of Co distribution on plastic deformation of nanocrystalline Al-10.2 at.% Co alloy |
title_full_unstemmed |
Effect of Co distribution on plastic deformation of nanocrystalline Al-10.2 at.% Co alloy |
title_sort |
effect of co distribution on plastic deformation of nanocrystalline al-10.2 at.% co alloy |
publishDate |
2015 |
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https://hdl.handle.net/10356/107061 http://hdl.handle.net/10220/25264 |
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1681058541000982528 |