Effect of the grain boundary on the evolution of deformation in a bicrystal

被引：7

作者：

Ziegler, A ^{[1
]}

Campbell, GH

Kumar, M

Stölken, JS

机构：

[1] Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Mat Sci & Technol Div, Livermore, CA 94551 USA

[2] Lawrence Livermore Natl Lab, Engn Directorate, New Technol Engn Div, Livermore, CA 94551 USA

来源：

JOURNAL OF MATERIALS SCIENCE | 2005年 / 40卷 / 12期

关键词：

D O I：

10.1007/s10853-005-2689-x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The role of grain boundary constraint in strain localization and concomitant constitutive response was examined by performing a series of uniaxial compression tests on a tantalum bicrystal. Tantalum single crystals were diffusion bonded to form a (011) 90 degrees twist boundary that was compressed along the common [011] direction. The plastic deformation resulted in the creation of deformation bands away from the highly constraining grain boundary, resembling those bands known from single crystal plastic deformation. Near the grain boundary, such deformation band formation could not be detected. Instead a distinctive pattern of crystal lattice rotation was observed that filled a rather large volume (several millimeters in size) around the bicrystal grain boundary. The internal deformation band structure as well as the crystal lattice rotation pattern near the bicrystal grain boundary were characterized and found to give greater rates of work hardening in the neighborhood of the grain boundary. (c) 2005 Springer Science + Business Media, Inc.

引用

页码：3225 / 3229

页数：5

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