Tensile behavior of columnar grained Cu with preferentially oriented nanoscale twins

被引：226
作者：
You, Z. S. [1 ]
Lu, L. [1 ]
Lu, K. [1 ]
机构：
[1] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
来源：
ACTA MATERIALIA | 2011年 / 59卷 / 18期
基金：
美国国家科学基金会; 中国国家自然科学基金; 新加坡国家研究基金会;
关键词：
Nanoscale twins; Threading dislocation; Grain size effect; Ductility; Work hardening; STRAIN-RATE SENSITIVITY; CENTERED-CUBIC METALS; DYNAMIC PLASTIC-DEFORMATION; NANO-SCALE TWINS; NANOTWINNED COPPER; NANOCRYSTALLINE METALS; NANOSTRUCTURED METALS; MECHANICAL-PROPERTIES; MAXIMUM STRENGTH; SIZE DEPENDENCE;
D O I：
10.1016/j.actamat.2011.07.044
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
By means of direct current electrodeposition nanoscale twins confined within microsized columnar grains of bulk Cu samples have been synthesized which are preferentially oriented parallel to the growth plane. Tensile tests of the as-deposited Cu samples showed that yield strength increased with decreasing twin thickness, while the work hardening capacity and the uniform tensile ductility decreased at smaller grain sizes. Detailed microstructure investigations suggest that columnar grained Cu samples exhibit inhomogeneous deformation during uniaxial tension, where grain boundaries take much larger plastic strain than that sustained by grain interiors. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：6927 / 6937
页数：11
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