Effect of grain size on fatigue behavior of Type 301LN stainless steel

被引：47
|
作者：
Jarvenpaa, Antti [1 ]
Karjalainen, L. Pentti [2 ]
Jaskari, Matias [1 ]
机构：
[1] Univ Oulu, Oulu Southern Inst, FI-85500 Oulu, Finland
[2] Univ Oulu, Dept Mech Eng, FI-90014 Oulu, Finland
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2014年 / 65卷
关键词：
Austenitic stainless steel; Reversion treatment; Grain size refinement; Crack initiation; Fatigue strength; AUSTENITIC STAINLESS; ALLOYS; METALS;
D O I：
10.1016/j.ijfatigue.2013.05.012
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The effect of grain size and phase structure on fatigue behavior in Type 301LN austenitic stainless steel was preliminarily investigated. Various grain sizes from submicron to coarse ones were obtained by controlled reversion treatments. Axial tension-tension fatigue tests were carried out under load control. Cyclic hardening was observed to take place very early in cycling. Hardness increased about 29% and high fraction of martensite, up to 40%, was formed in ultrafine-grained structures. The fatigue damage occurred by grain boundary cracking in ultrafine-grained structures, where no slip bands were formed. Partly recrystallized shear bands were observed in cold-rolled austenite grains and grain boundary cracking took place within them as well. In the coarse-grained steel, intense slip bands were formed and crack nucleated and propagated along them and grain boundaries. Fatigue resistance was improved by the grain size refinement. (c) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：93 / 98
页数：6
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