Thermal Stability in Nanocrystalline Fe-30 Wt Pct Ni Alloy Induced by Surface Mechanical Attrition Treatment

被引：0
|
作者：
W. Li
Q.P. Meng
P. Liu
F.C. Ma
Y.H. Rong
机构：
[1] University of Shanghai for Science and Technology,School of Materials Science and Engineering
[2] Shanghai Jiao Tong University,School of Materials Science and Engineering
来源：
Metallurgical and Materials Transactions A | 2010年 / 41卷
关键词：
Austenite; Martensite; Boundary Diffusion; Nanocrystalline Material; Subgrain Boundary;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
By means of surface mechanical attrition treatment (SMAT), a nanocrystalline surface layer is produced in Fe-30 wt pct Ni alloy, accompanying the formation of the strain-induced martensite. The thermal stability of nanocrystalline martensite and parent phase austenite in Fe-30 wt pct Ni alloy is studied by X-ray diffraction (XRD) and transmission electron microscope (TEM). The grain growth kinetics parameters, time exponent, n, and activation energy, Q, for both martensite and austenite, are determined, respectively. The TEM observations indicate that abnormal grain growth occurs during annealing at high temperatures.
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页码：2992 / 2999
页数：7
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