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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Main Authors: Babicheva, Rita I., Dmitriev, Sergey V., Zhang, Ying, Kok, Shaw Wei, Zhou, Kun
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2015
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Online Access:https://hdl.handle.net/10356/107061
http://hdl.handle.net/10220/25264
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Institution: Nanyang Technological University
Language: English
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spelling 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
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Materials::Nanostructured materials
spellingShingle 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
description 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.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Babicheva, Rita I.
Dmitriev, Sergey V.
Zhang, Ying
Kok, Shaw Wei
Zhou, Kun
format Article
author Babicheva, Rita I.
Dmitriev, Sergey V.
Zhang, Ying
Kok, Shaw Wei
Zhou, Kun
author_sort 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
url https://hdl.handle.net/10356/107061
http://hdl.handle.net/10220/25264
_version_ 1681058541000982528