The Role of Microstructure in Hydrogen-Induced Fatigue Failure of 304 Austenitic Stainless Steel

被引：13

作者：

Nygren, K. E. ^{[1
,2
]}

Nagao, A. ^{[3
,4
]}

Sofronis, P. ^{[3
,5
]}

Robertson, I. M. ^{[6
,7
]}

机构：

[1] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[2] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, 744 Moto Oka, Fukuoka, Fukuoka 8190395, Japan

[3] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Fukuoka, Fukuoka, Japan

[4] JFE Steel Corp, Steel Res Lab, Chiyoda Ku, 2-2-3 Uchisaiwai Cho, Tokyo 1000011, Japan

[5] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA

[6] Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA

[7] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2020年 / 51卷 / 11期

基金：

美国国家科学基金会;

关键词：

ENHANCED LOCALIZED PLASTICITY; CRACK GROWTH-BEHAVIOR; MECHANICAL-PROPERTIES; STRAIN-RATE; DEFORMATION; EMBRITTLEMENT; TRANSFORMATION; FE; DISLOCATIONS; MARTENSITE;

D O I：

10.1007/s11661-020-05977-w

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of 104 mass ppm of hydrogen on the evolved microstructures associated with accelerated fatigue failure in type 304 austenitic stainless steel is reported. The fracture surface morphology changed from ductile striations to mixed mode that appeared "quasi-cleavage-like" and "flat." Detailed microstructural characterization determined that these fractures were along the austenite-martensite interfaces. The morphology and orientation of the strain-induced martensite were impacted by the presence of hydrogen. Hydrogen constrained the formation of alpha '-martensite into linear, planar bands in the grains nearest the fracture surface, and epsilon-martensite was formed between the alpha '-martensite bands. The dislocation structure generated by the cyclic loading and the restriction of the martensitic transformation to specific forms by hydrogen is explained through the hydrogen-enhanced localized plasticity mechanism.

引用

页码：5704 / 5714

页数：11

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