The orientation and temperature dependences of dislocation velocity in Ni3Al single crystals

被引：1

作者：

Zhang, ZF ^{[1
]}

Jiang, CB ^{[1
]}

Wu, SD ^{[1
]}

Patu, S ^{[1
]}

机构：

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

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 2003年 / 83卷 / 09期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1080/0950083031000152805

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The average velocities of screw dislocations in Ni3Al single crystals have been directly measured as a function of resolved shear stress (RSS) and orientation in the temperature domain of the flow stress anomaly using the etch-pit technique. The velocity was found to be extremely sensitive to the RSS in all cases. In contrast with ordinary metals, the screw dislocation velocities in Ni3Al show anomalous behaviour; under a constant RSS, the velocities decrease dramatically with increasing temperature. Furthermore, the velocities and the tension compression asymmetry of the velocities depend on the orientation of applied stress.

引用

页码：563 / 568

页数：6

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