Synchrotron X-ray study of bulk lattice strains in externally loaded Cu-Mo composites

被引：81

作者：

Wanner, A ^{[1
]}

Dunand, DC

机构：

[1] Univ Stuttgart, Inst Met Kunde, D-70174 Stuttgart, Germany

[2] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2000年 / 31卷 / 11期

基金：

美国能源部; 美国国家科学基金会;

关键词：

D O I：

10.1007/BF02830344

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A synchrotron X-ray transmission technique was applied to study the internal load transfer and micromechanical damage in molybdenum particle-reinforced copper matrix composites during plastic deformation. Mechanically loaded, 1.5-mm-thick specimens were irradiated with a monochromatic beam of 65 keV X-rays. Low-index diffraction rings of both phases were recorded with a high-resolution two-dimensional detector. By means of newly developed data processing routines, we could quantify as a function of applied stress both the ring distortion (from which the volume-averaged elastic strains in the two phases were calculated), and the ring graininess (which is related to the Bragg peak broadening). Based on this information, the deformation and damage processes in these alloys were studied in detail. As compared to conventional neutron diffraction methods, the photon transmission technique yielded similar precision but at much reduced measurement times. The main sources of experimental errors were identified and strategies to minimize these errors were developed.

引用

页码：2949 / 2962

页数：14

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