Fatigue-crack initiation in a Fe-C-Si-Mn steel with carbide-free lathy bainite

被引：3
作者：
Liu, WY [1 ]
Qu, JX [1 ]
Shao, HS [1 ]
机构：
[1] CUMT, BEIJING GRAD SCH, BEIJING 100083, PEOPLES R CHINA
来源：
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 1997年 / 69卷 / 1-3期
关键词：
carbide-free lathy bainite; fatigue crack initiation; inclusions;
D O I：
10.1016/S0924-0136(97)00016-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
With carbide-free lathy bainite by isothermal transformation, a Si-Mn steel has high strength and high toughness, Its fatigue initiation was investigated by axial fatigue cycling at room temperature and at a stress ratio of -1. The fractures were observed in a scanning electron microscopy (SEM). The results show that all of the fatigue cracks initiated at surface and shallow sub-surface inclusions. Defects in the steel are the main fatigue-crack initiator. Three types of crack initiation at inclusion sites were observed. (C) 1997 Elsevier Science S.A.
引用
收藏
页码：186 / 189
页数：4
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