Measurement of stress using synchrotron x-rays

被引：22

作者：

Weidner, Donald J. ^{[1
]}

Li, Li ^{[1
]}

机构：

[1] SUNY Stony Brook, Dept Geosci, Inst Mineral Phys, Stony Brook, NY 11794 USA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2006年 / 18卷 / 25期

关键词：

D O I：

10.1088/0953-8984/18/25/S12

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Stress analysis in polycrystalline materials reveals that stress can vary considerably among different subpopulations of grains. Samples of MgO and mixtures of MgO and spinel have been studied. After the onset of plastic flow, stronger grains or orientations will support more stress than the weaker grains. A grain to grain fabric develops that enables this stress partitioning. The stress partitioning and the resulting fabric can invalidate static measurements of elastic moduli. However, high temperature flow mechanisms reveal a more isotropic strength behaviour resulting in a more uniform variation of stress with orientation.

引用

页码：S1061 / S1067

页数：7

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