Fatigue crack initiation from small defects under low stress ratios in SAE52100 bearing steel

Y. Hino, H. Matsunaga

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Axial-loading fatigue tests were carried out under low stress ratios, R = -∞ ∼ -5.33, by use of a cylindrical specimen of SAE52100 bearing steel having drill holes of 50 ∼ 200 μm in diameter. The maximum stresses, σmax = 0 ∼ 300 MPa were combined with the minimum stresses, σmin of -1600 or -1800 MPa. Even at σmax = 0, fatigue cracks were initiated at hole edges by cyclic compressive stress of σmin = -1800 MPa, and the cracks finally became non-propagating. When σmax was positive, fatigue cracks were initiated even at σmin = -1600 MPa and they also became non-propagating. The length of non-propagating cracks increased with an increase in σmax. Those phenomena were considered to be related to the tensile residual stress that was induced by the plastic deformation in the vicinity of hole edges. The relationship between the length of non-propagating crack and the residual stress field was investigated in terms of elastic-plastic finite element analysis.

Original languageEnglish
Title of host publicationFourth International Conference on Experimental Mechanics
DOIs
Publication statusPublished - Dec 1 2010
Externally publishedYes
Event4th International Conference on Experimental Mechanics - Singapore, Singapore
Duration: Nov 18 2009Nov 20 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7522
ISSN (Print)0277-786X

Other

Other4th International Conference on Experimental Mechanics
CountrySingapore
CitySingapore
Period11/18/0911/20/09

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Hino, Y., & Matsunaga, H. (2010). Fatigue crack initiation from small defects under low stress ratios in SAE52100 bearing steel. In Fourth International Conference on Experimental Mechanics [752206] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7522). https://doi.org/10.1117/12.852684