The size effect and plastic deformation mechanism transition in the nanolayered polycrystalline metallic multilayers
The size effect and plastic deformation mechanism transition in the nanolayered polycrystalline metallic multilayers
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纳米层多晶金属多层板的尺寸效应和塑性变形机制转变
DOI：
10.1063/1.4884220
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发表时间：
2014-06
影响因子：
3.2
通讯作者：
Huang, Minsheng
中科院分区：
文献类型：
--
作者：
Zhu, Yaxin;Li, Zhenhuan;Huang, Minsheng
采用分子动力学模拟方法研究了纳米多晶金属多层材料的强度和变形机理，重点研究了晶粒尺寸和层厚的耦合效应。结果表明，多层材料的强度并不总是随着层厚或晶粒尺寸的减小而敏感地增加，其中较小的层厚或晶粒尺寸对强度的影响较大。由于GBs和相界面对镀金位错的约束，控制NPMMs强度的变形机制可能有几种，包括局限的局部位错滑移、局限的扩展位错滑移和局限的晶界滑移。随着多层材料特征尺寸（即层厚或晶粒尺寸）的增大或减小，主要的变形机制会发生变化，从而对多层材料的强度产生非常复杂的尺寸效应。的根本原因是……
The strength and deformation mechanisms of the nanolayered polycrystalline metallic multilayers (NPMMs) are investigated via molecular dynamics simulation, with special attentions to the coupling effect of grain size and layer thickness. The results indicate that the strength of multilayers does not always increases sensitively with the decrease of layer thickness or grain size, and the smaller one of them governs substantially the size effect on the strength. Due to the constraint of GBs and phase interface to gilding dislocations, there are several possible deformation mechanisms, which can govern the strength of NPMMs, including the confined partial dislocation slip, confined extended dislocation slip, and confined grain boundary slip. With the increase or decrease of the characteristic size of multilayers (i.e., layer thickness or grain size), the dominant deformation mechanism changes from one to another, resulting in very intricate size effect on the strength of multilayers. The underlying reason of...
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影响因子：
6
作者：
Zhang, J. Y.;Liu, G.;Zhang, X.;Zhang, G. J.;Sun, J.;Ma, E.
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影响因子：
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影响因子：
4
作者：
通讯作者：
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影响因子：
5.3
作者：
Yang, Fan;Yang, Wei
通讯作者：
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DOI：
10.1007/bf02666659
发表时间：
1989-11-01
期刊：
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
影响因子：
--
作者：
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通讯作者：
NIX, WD