Fatigue behavior of ferritic-pearlitic-bainitic steel in loading with positive mean stress

被引：14
|
作者：
Polak, Jaroslav [1 ]
Man, Jiri [1 ]
Petrenec, Martin [1 ]
Tobias, Jiri [1 ]
机构：
[1] Acad Sci Czech Republ, Inst Phys Mat, Brno 61662, Czech Republic
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2012年 / 39卷
关键词：
Fatigue life; Mean stress; Plastic strain; Cyclic creep; Fatigue damage; CYCLE FATIGUE; STRAIN RESPONSE; LIFE; CREEP; FAILURE;
D O I：
10.1016/j.ijfatigue.2011.02.012
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The effect of positive mean stress on the fatigue behavior of ferritic-pearlitic-bainitic steel has been studied. Specimens, produced from a massive forging, were cycled with two constant stress amplitudes and various positive mean stresses. Plastic strain amplitude and cyclic creep rate were measured during cyclic loading and the effect of the mean stress on saturated plastic strain amplitude and mean strain at half-life was established. Plastic strain amplitude is weakly, dependent but creep strain increases with the mean stress exponentially. Fatigue life decreases with the mean stress for both stress amplitudes. The contributions of cyclic plastic strain and cyclic creep to the fatigue damage were evaluated and discussed in relation with the Manson-Coffin curve. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：103 / 108
页数：6
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