Modeling of the grain boundary segregation of helium in α-Fe

被引：11
|
作者：
Suzudo, Tomoaki [1 ]
Kaburaki, Hideo [1 ]
Yamaguchi, Masatake [1 ]
机构：
[1] Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan
来源：
JOURNAL OF NUCLEAR MATERIALS | 2011年 / 417卷 / 1-3期
关键词：
MARTENSITIC STEELS; EMBRITTLEMENT;
D O I：
10.1016/j.jnucmat.2011.02.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We proposed a kinetic theory model of helium segregation from the bulk to the grain boundary in alpha-Fe. This model is constructed on the basis of the ab initio results of large segregation energy and large deduction in strength at the grain boundary due to helium. The simulation results of the model showed the typical segregation features as function of bulk concentration of helium and temperature in general agreement with experiment. In addition, the results are compared with McLean's model for monoatomic-layered grain boundary segregation in equilibrium, and the validity of this equilibrium model is discussed. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：1102 / 1105
页数：4
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