期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2017.12.079
关键词
Advanced high strength steel; SEM; Microstructure; Hydrogen embrittlement
类别
资金
- Baosteel-Australia Joint Research & Development Centre (BAJC) [BA13037]
- Baoshan Iron and Steel Co., Ltd of China
The role of microstructure was studied for dual-phase (DP), quenched and partitioned (Q&P), and twinning induced plasticity (TWIP) steels. The hydrogen influence changed the fracture mode at the ultimate tensile strength, there being no subcritical crack growth at a lower stress. The fractures initiated (i) in the hard martensite and/or at the interfaces of ferrite and martensite for DP steels, (ii) in the martensite and/or at the interfaces of retained austenite and martensite for Q&P steels, and (iii) at mechanical twins for TWIP steels. Tempering may improve the resistance to hydrogen of DP and Q&P steels.
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