Effects of crack size and crack face interference on shear fatigue crack growth in a bearing steel

Naoya Shomura, Keiji Yanase, Hisao Matsunaga, Masahiro Endo

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

Abstract

The near-threshold fatigue behavior of small, semi-elliptical surface cracks in a bearing steel was investigated under cyclic shear-mode loading in ambient air. Fully-reversed cyclic torsion was combined with a static axial compressive stress to obtain a stable shear-mode crack growth in the longitudinal direction of cylindrical specimens. Shear stress amplitude was gradually decreased with an increase in crack length and the crack finally became non-propagating. Abrasive wear on the crack faces was inferred by debris and also by changes in microstructure in the wake of crack tip. Further, it was found that these effects resulted in a significant decrease in the crack growth rate. In this study, we shed light on the important role of the crack size and crack face interference on the crack growth behavior.

Original languageEnglish
Title of host publicationStructural Integrity and Failure, SIF 2010
Pages15-18
Number of pages4
DOIs
Publication statusPublished - Jul 21 2011
Externally publishedYes
EventInternational Conference on Structural Integrity and Failure, SIF2010 - Auckland, New Zealand
Duration: Jul 4 2010Jul 7 2010

Publication series

NameAdvanced Materials Research
Volume275
ISSN (Print)1022-6680

Other

OtherInternational Conference on Structural Integrity and Failure, SIF2010
CountryNew Zealand
CityAuckland
Period7/4/107/7/10

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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