Grain Boundary Behavior in an Ultrafine-Grained Aluminum Alloy

被引：0
|
作者：
P. S. De
R. S. Mishra
机构：
[1] Missouri University of Science and Technology,Center for Friction Stir Processing, Department of Materials Science and Engineering
来源：
Metallurgical and Materials Transactions A | 2011年 / 42卷
关键词：
Cyclic Loading; High Cycle Fatigue; Irreversible Thermodynamic; Orientation Imaging Microscopy; Microcrystalline Alloy;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The low-angle grain boundary (LAGB) stability in an ultrafine-grained (UFG) Al alloy during monotonic loading was investigated by orientation imaging microscopy (OIM). The experiments show that boundaries with misorientation below ~2.5 deg are stable, while boundaries with misorientation between 2.5 and 15 deg are unstable. Similar results were observed during cyclic loading of UFG Al alloy. This behavior was rationalized using the nonequilibrium thermodynamics concept. On the other hand, it is postulated that the grain boundary behavior in microcrystalline alloy is different because of the larger dislocation mean free path.
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页码：3558 / 3561
页数：3
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