Enhancement of fracture toughness of high-strength Cr-Ni weld metals by strain-induced martensite transformation

被引：21
|
作者：
Qiu, H. [1 ]
Wang, L. N. [1 ]
Qi, J. G. [1 ]
Zuo, H. [1 ]
Hiraoka, K. [2 ]
机构：
[1] Natl Inst Mat Sci, Res Ctr Strateg Mat, Tsukuba, Ibaraki 3050047, Japan
[2] Osaka Univ, Joining & Welding Res Inst, Suita, Osaka 565, Japan
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2013年 / 579卷
关键词：
Retained austenite; Strain-induced martensite transformation; Cr-Ni weld metal; Low temperature; ASSISTED MULTIPHASE STEELS; PHASE-TRANSFORMATION; RETAINED AUSTENITE; BRITTLE MATERIALS; CRACK; MECHANICS; ZIRCONIA; CERAMICS; FATIGUE; SILICON;
D O I：
10.1016/j.msea.2013.05.012
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of strain-induced martensite transformation from retained austenite was investigated on the fracture toughness of Cr-Ni weld metal, in terms of crack tip opening displacement, within the range of room temperature to 77 K. Strain-induced martensite transformation has a positive impact on fracture toughness and can change fracture mode. This effect generally increases with an increase in the amount of retained austenite, but it is weak at 77 K. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：71 / 76
页数：6
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