Microstructure evolution and very-high-cycle fatigue crack initiation behavior of a structural steel with two loading intermittence modes

被引：18
作者：
Zhou, Yadong [1 ,2 ]
Sun, Jingyu [1 ,2 ]
Pan, Xiangnan [1 ,2 ]
Qian, Guian [1 ,2 ]
Hong, Youshi [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2022年 / 161卷
基金：
中国国家自然科学基金;
关键词：
Loading intermittence; Microstructure evolution; Very-high-cycle fatigue; Facet; Slip system; HIGH-STRENGTH STEELS; CR-NI-STEELS; GIGACYCLE FATIGUE; DEFORMATION-BEHAVIOR; PLASTIC-DEFORMATION; INCLUSION; REGIME; SLIP; NANOSTRUCTURE; PROPAGATION;
D O I：
10.1016/j.ijfatigue.2022.106904
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The effects of fatigue loading intermittence on specimens manufactured on two locations in a railway wheel were experimentally investigated: (i) in the rim and (ii) web plate (WP). The specimens with 50 ms pause presented a substantially lower fatigue strength in comparison to those with 300 ms pause. The microstructure evolution indicated the occurrence of martensitic transformation and discontinuous dynamic recrystallization. Rim and WP show respective preference for crack initiation, i.e. inclusion or matrix. Slip on {1 1 0} and {1 1 2} plane families prevails in ferrite. The pearlitic lamellae aligned at 45 degrees relative to applied tension indicates that crack initiates and propagates along the ferrite-cementite interface due to stress concentration as a result of inhomogeneous deformation.
引用
收藏
页数：11
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