Indentation of nanotwinned fcc metals: Implications for nanotwin stability

被引：47

作者：

Bezares, Jiddu ^{[1
]}

Jiao, Shuyin ^{[4
]}

Liu, Yue ^{[3
]}

Bufford, Daniel ^{[3
]}

Lu, Lei ^{[2
]}

Zhang, Xinghang ^{[3
]}

Kulkarni, Yashashree ^{[4
]}

Asaro, Robert J. ^{[1
]}

机构：

[1] Univ Calif San Diego, Dept Struct Engn, La Jolla, CA 92093 USA

[2] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

[3] Texas A&M Univ, Dept Mech Engn, Mat Sci & Engn Program, College Stn, TX 77843 USA

[4] Univ Houston, Dept Mech Engn, Houston, TX 77204 USA

来源：

ACTA MATERIALIA | 2012年 / 60卷 / 11期

基金：

美国国家科学基金会;

关键词：

Nanotwins; Grain stability; Nanocrystalline metals; GRAIN-SIZE; NANOCRYSTALLINE; STRENGTH; SAMPLES; CU;

D O I：

10.1016/j.actamat.2012.03.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cyclic nano- and microindentation, along with indentation creep, were performed on nanotwinned Cu with two twin structures, and on nanotwinned Ag. The results provide evidence that nanotwinned face-centered cubic (fcc) structures are more stable than their nanocrystalline counterparts. The results are put in the important context of the available body of theoretical study of nanotwinned fcc metals, and in particular in the context of the theoretical forecasts of Kulkarni and Asaro [Kulkarni Y, Asaro RJ. Acta Mater 2009;57:2711]. It is shown, for example, that, as predicted, nanotwinned Ag displays performance comparable, if not superior, to nanotwinned Cu. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：4623 / 4635

页数：13

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