CRYSTALLOGRAPHIC BEHAVIORS OF COMPRESSED HIGH MANGANESE TRIP/TWIP STEELS ANALYZED BY EBSD TECHNIQUES II. Martensitic Misorientations, the Evolution of Martensitic Orientations and the Influence of Austenitic Orientations

被引：0
|
作者：
Yang Ping [1 ]
Lu Fayun [1 ]
Meng Li [1 ]
Cui Feng'e [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
来源：
ACTA METALLURGICA SINICA | 2010年 / 46卷 / 06期
基金：
中国国家自然科学基金;
关键词：
high manganese steel; EBSD; TRIP/TWIP; martensitic transformation; misorientation; texture; SHAPE-MEMORY ALLOY; EPSILON-MARTENSITE; STAINLESS-STEEL; MICROSTRUCTURAL ANALYSIS; PLASTIC-DEFORMATION; VARIANT SELECTION; TRANSFORMATION; 304-STAINLESS-STEEL; DEPENDENCE; TEXTURE;
D O I：
10.3724/SP.J.1037.2010.00666
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
In this paper, deformation behaviors of two kinds of martensites (hexagonal and bcc structures) and the influence of austenitic orientations on martensitic transformation in high manganese TRIP/TWIP (transformation-induced plasticity/twinning-induced plasticity) steels during compression were analyzed by EBSD technique. Results showed that, in hexagonal martensites low angle grain boundaries caused by slip and special misorientations such as 93 degrees < 7 (2) over bar(5) over bar3 > were detected in addition to those inherited due to orientation relationship. In bcc martensite, low angle misorientations due to slip were dominant in addition to the special misorientations between alpha'-M variants or those inherited from austenitic twins. Besides, austenitic orientations affected phase transformation and it was observed that martensite was induced faster in austenitic grains of {110}(gamma) orientation than that of {100}(gamma) orientation. alpha'-M orientation changed more obviously in {110}(alpha') oriented grains because they were unstable during compression. The reasons for the formation of new special misorientations in hexagonal martensite and the influence of austenitic orientation were discussed.
引用
收藏
页码：666 / 673
页数：8
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