Twin stability in highly nanotwinned Cu under compression, torsion and tension

SCRIPTA MATERIALIA

卷:66

Article

Hodge, A. M.¹  Furnish, T. A.¹  Shute, C. J.²  Liao, Y.²  Huang, X.³  Hong, C. S.³  Zhu, Y. T.⁴  Barbee, T. W., Jr.⁵  Weertman, J. R.² 

[1] Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA

[2] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

[3] Tech Univ Denmark, Riso Natl Lab Sustainable Energy, Mat Res Div, Danish Chinese Ctr Nanomet, DK-4000 Roskilde, Denmark

[4] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA

[5] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

关键词: Nanotwinned;    Copper;    Plastic deformation;    Nanostructure;   

DOI  :  10.1016/j.scriptamat.2012.01.027

来源: Elsevier

【 摘 要 】

Twin stability under four distinct mechanical loading states has been investigated for highly nanotwinned Cu containing parallel nanotwins similar to 40 nm thick. Observed deformation-induced microstructural changes under tension, compression, tension-tension fatigue and torsion are qualitatively compared in order to assess twin stability as a function of the loading direction and stress. It is observed that the twins are very stable although small microstructural changes vary with deformation mode. Shear bands, deformation-induced grain growth and detwinning are also discussed. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free