STRENGTHENING MECHANISM IN METALS WITH NANO-SCALE TWINS

被引：0

作者：

Lu, L. ^{[1
]}

Lu, K. ^{[1
]}

机构：

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

来源：

ADVANCES IN HETEROGENEOUS MATERIAL MECHANICS 2011 | 2011年

关键词：

Nanoscale twins; strength; ductility; work hardening; defamation mechanism; STRAIN-RATE SENSITIVITY; CENTERED-CUBIC METALS; MAXIMUM STRENGTH; COPPER; BOUNDARIES; DISLOCATIONS;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Methods used to strengthen metals typically also cause a pronounced decrease in ductility. Here we review a novel approach to realize significant strengthening while maintaining a reasonable ductility by nanoscale coherent twins. By introducing a high density of nano-scale twins in pure Cu, high strength and good ductility are achieved simultaneously. Particularly, a maximum strength was found in the nanotwinned Cu at a twin thickness of 15 nm, followed by a rapid softening and a monotonic enhancement in both the strain-hardening and ductility at smaller twin thicknesses. These unique properties and related dislocation twin boundary strengthening mechanism differ fundamentally from the dislocation-grain boundary strengthening mechanism.

引用

页码：630 / 634

页数：5

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