Optimal Bainite Contents for Maximizing Fatigue Cracking Resistance of Bainite/Martensite Dual-Phase EA4T Steels

被引：14

作者：

Chen, Jian-Zhi ^{[1
]}

Zhang, Bin ^{[1
]}

Zeng, Ling-Rong ^{[2
]}

Song, Zhu-Man ^{[2
]}

She, Yi-Yun ^{[3
]}

Zhang, Guang-Ping ^{[2
]}

机构：

[1] Northeastern Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Anisotropy & Texture Mat, 3-11 Wenhua Rd, Shenyang 110819, Liaoning, Peoples R China

[2] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China

[3] Zhuzhou CRRC Corp Ltd, Tian Li Forging Co Ltd, Tianxin 412001, Zhuzhou, Peoples R China

来源：

STEEL RESEARCH INTERNATIONAL | 2018年 / 89卷 / 07期

基金：

中国国家自然科学基金;

关键词：

bainite/martensite; crack growth; dual-phase; EA4T steel; fatigue; RAILWAY AXLE STEEL; RETAINED AUSTENITE; MICROSTRUCTURAL MORPHOLOGY; TEMPERING TEMPERATURE; DEFORMATION-BEHAVIOR; FERRITE-PEARLITE; GROWTH; STRENGTH; ALLOY; PROPAGATION;

D O I：

10.1002/srin.201700562

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Fatigue crack propagation behavior of bainite/martensite dual-phase EA4T steels with four different volume fractions of bainite ranging from 21% to 70% is investigated. The results indicate that the bainite/martensite dual-phase steel specimens with the volume fraction of bainite of 49-60% have the higher resistance to fatigue crack growth than the others. The coupled contributions of plasticity-induced crack closure and crack deflection to the higher fatigue crack growth resistance is estimated. A model related to the plastic zone size and the roughness of the fracture surface is proposed to evaluate the optimal volume fraction of bainite in the dual-phase steels.

引用

页数：10

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