In situ atomistic deformation mechanisms of twin-structured nanocrystal Pt - 文章详情页

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摘要：

The　atomic-scale　in　situ　tensile　tests　of　twin-structured　Pt　(d　=　similar　to　25　nm)　nanocrystals　were　conducted　using　a　home-made　device　in　a　high-resolution　transmission　electron　microscope.　We　showed　that　the　twin-structured　Pt　nanocrystals　exhibit　as　large　as　21.9%　homogeneous　elongation　before　crack　emergence.　The　atomic-scale　and　time-resolved　in　situ　investigation　indicated　that,　full　and　partial　dislocations　that　intersect　with　coherent　twin　boundaries　(TBs),　as　well　as　TB　migration　resulting　from　partial　dislocations　glide　adjacent　to　the　TBs,　and　the　rapid　migration　of　incoherent　TBs　all　contribute　the　large　homogeneous　elongation　capability　of　the　twin-structured　nanocrystals.　(C)　2018　Acta　Materialia　Inc.　Published　by　Elsevier　Ltd.　All　rights　reserved.

关键词：

Coherent twin boundary Plastic deformation Atomic-scale In situ Incoherent twin boundary

作者机构：

[ 1 ] [Wang, Lihua]Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
[ 2 ] [Kong, Deli]Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
[ 3 ] [Zhang, Ze]Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
[ 4 ] [Han, Xiaodong]Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
[ 5 ] [Teng, Jiao]Univ Sci & Technol Beijing, Dept Mat Phys & Chem, Beijing 100083, Peoples R China
[ 6 ] [Yu, Guanghua]Univ Sci & Technol Beijing, Dept Mat Phys & Chem, Beijing 100083, Peoples R China
[ 7 ] [Zou, Jin]Univ Queensland, Mat Engn & Ctr Microscopy & Microanal, Brisbane, Qld 4072, Australia
[ 8 ] [Zhang, Ze]Zhejiang Univ, Dept Mat Sci, Hangzhou 310008, Zhejiang, Peoples R China

通讯作者信息：

王立华韩晓东
[Wang, Lihua]Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100124, Peoples R China;;[Han, Xiaodong]Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100124, Peoples R China;;[Zou, Jin]Univ Queensland, Mat Engn & Ctr Microscopy & Microanal, Brisbane, Qld 4072, Australia

电子邮件地址：

wlh@bjut.edu.cn |
j.zou@uq.edu.au |
xdhan@bjut.edu.cn

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