Interface strength in NiAl-Mo composites from 3-D X-ray microdiffraction

被引：13
作者：
Barabash, R. I. [1 ,2 ]
Bei, H. [1 ]
Gao, Y. F. [2 ,3 ]
Ice, G. E. [1 ]
机构：
[1] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA
[2] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA
[3] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA
来源：
SCRIPTA MATERIALIA | 2011年 / 64卷 / 09期
关键词：
Composites; Micromechanics; X-ray synchrotron radiation; Strain gradient; Interface strength; DISLOCATION DENSITIES; DEFORMATION; GRADIENTS; BEHAVIOR; MODEL;
D O I：
10.1016/j.scriptamat.2011.01.028
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The depth-dependent strain gradients near buried interfaces in a model system of NiAl-Mo composite were nondestructively probed with 3-D X-ray microdiffraction. Coupled with micromechanical analysis, our study shows that the relaxation of the residual thermal strains in the NiAl-Mo composites results in the formation of a near-surface "slip zone" with large strain gradients in both the reinforcing Mo fibers and NiAl matrix. Based on these results an approach to calculate the fiber matrix interface strength for composite materials is suggested. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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收藏
页码：900 / 903
页数：4
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