EFFECT OF ORIGINAL GRAIN SIZE ON THE BOUNDARY NETWORK IN ALLOY 690 TREATED BY GRAIN BOUNDARY ENGINEERING

被引：3
|
作者：
Liu Tingguang [1 ]
Xia Shuang [1 ]
Li Hui [1 ]
Zhou Bangxin [1 ]
Chen Wenjue [1 ]
机构：
[1] Shanghai Univ, Inst Mat, Shanghai 200072, Peoples R China
来源：
ACTA METALLURGICA SINICA | 2011年 / 47卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Ni base alloy 690; grain boundary engineering (GBE); grain size; low-Sigma CSL grain boundary; grain boundary network; AUSTENITIC STAINLESS-STEEL; INTERGRANULAR CORROSION; CHARACTER-DISTRIBUTION; SIGMA-3; BOUNDARIES; FCC MATERIALS; STRAIN; RECRYSTALLIZATION; EVOLUTION; DISTRIBUTIONS; OPTIMIZATION;
D O I：
10.3724/SP.J.1037.2011.00196
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Effect of original grain size on the grain boundary character distribution (GBCD) in alloy 690 after treatment by grain boundary engineering (GBE) was studied using electron backscatter diffraction (EBSD) and orientation image microscopy (OIM). The proportion of low-Sigma CSL grain boundary and grain boundary network after GBE are obviously influenced by the original grain size. Optimized GBE grain boundary network after the same annealing process can be obtained by altering the cold work degree based on the original grain size. Thus the microstructure after GBE is influenced by the combined effect of original grain size and deformation amount before annealing. Mean strain of grain is used to express the combined effect. A proper value of mean strain of grain is necessary to achieve the desired GBE grain boundary network.
引用
收藏
页码：859 / 864
页数：6
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