COMPARISON OF A CYCLIC BEHAVIOR OF 316L STEEL IN UNIAXIAL AND MULTIAXIAL CYCLIC LOADING

被引：0
|
作者：
Poczklan, L. [1 ]
Mazanova, V [1 ]
Kruml, T. [2 ]
机构：
[1] Inst Phys Mat, Zizkova 22, Brno 61662, Czech Republic
[2] CEITEC IPM, Zizkova 22, Brno 61662, Czech Republic
来源：
ENGINEERING MECHANICS 2019 | 2019年 / 25卷
关键词：
fatigue behavior; multiaxial cyclic loading; phase transformation; 316L stainless steel; fatigue crack initiation; STAINLESS-STEEL; DISLOCATION-STRUCTURES; FATIGUE;
D O I：
10.21495/71-0-287
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A study of the cyclic behavior of austenitic stainless steel 316L was carried out in uniaxial loading, pure torsional loading and multiaxial in phase loading. Experiments were performed on hollow cylindrical specimens with polished surface. The specimens were cyclically loaded at room temperature with constant total strain amplitude. The specimen surface was observed by scanning electron microscopy and the microstructure was investigated by transmission electron microscopy. Differences in the mechanical response in different loading modes are discussed. It was found that the exhibited secondary hardening is caused by both the phase transformation and the appearance of alpha' martensite. The phase transformation is more intense in the case of torsional loading as compared to axial loading. The crack initiation mechanism does not change considerably in individual modes. Persistent slip bands occur and fatigue cracks initiate along them.
引用
收藏
页码：287 / 290
页数：4
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