Mixed mode fatigue behavior under inclined loading conditions for an austenitic 304L steel
- Tsinghua Univ., Beijing (China). Dept. of Engineering Mechanics
- Academica Sinica, Shenyang (China). State Key Lab. for Fatigue and Fracture of Materials
In this work, a proper type of circular ring specimen containing a V-notch on the internal radius has been proposed to realize mixed-mode stress field at notch root under inclined uniaxial loading. This kind of geometry has already been used to study different fatigue-fracture problems. Ahmad et al. used it to investigate the crack propagation in the case of the constant stress intensity factor. Cheverton et al. performed the tests of the crack propagation and arrest under thermal shock loading conditions. More recently, Nunomura et al. and Shi et al. used also this type of specimen to identify fatigue crack propagation behavior under inclined loading. In the authors cases, not only crack initiation and propagation behavior from a notch for a 304L austenitic steel under inclined loading was investigated, but also crack arrest and branch phenomena were analyzed with respect to the change of the angle of inclined loading. The relationship between the angle of inclined loading and the angle of branched crack was studied. The microstructure o branched cracks was observed, and the tensile stress model and the energy release rate model were applied to identify the crack growing direction.
- OSTI ID:
- 328250
- Journal Information:
- Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 2 Vol. 40; ISSN 1359-6462; ISSN SCMAF7
- Country of Publication:
- United States
- Language:
- English
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