Internal fracture process in fatigue of radical nitrided bearing steel

K. Morino, N. Kawagoishi, Q. Chen, K. Fukada, E. Kondo

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

Abstract

Rotating bending fatigue tests were carried out for a radical nitrided bearing steel in order to investigate the initiation and propagation behavior of an internal crack. Surface fracture occurred under high stress levels and fish-eye fracture happened under low stress levels so that the S-N curve appeared in the shape of two-step lines. The depth of the origin of internal fracture was confined in a relatively narrow region near the boundary between the hardened and non-hardened matrix. By two-step loading fatigue tests in the internal fracture region, a circular trace corresponding to the stress change was observed within the fish-eye. In the internal fracture region, a crack was initiated at the early stage of the fatigue process, that is, most of the fatigue life of internal fracture was occupied by the growth life of an internal crack.

Original languageEnglish
Title of host publicationSurface Treatment VI
Subtitle of host publicationComputer Methods and Experimental Measurements for Surface Treatment Effects
EditorsC.A. Brebbia, J.T.M. Hosson, S.-I. Nishida
Pages213-222
Number of pages10
Publication statusPublished - Dec 1 2003
Externally publishedYes
EventSixth International Conference on Computer Methods and Experimental Measurements for Surface Treatment Effects, Surface Treatment VI - Crete, Greece
Duration: Mar 11 2003Mar 13 2003

Publication series

NameComputational and Experimental Methods
Volume7

Other

OtherSixth International Conference on Computer Methods and Experimental Measurements for Surface Treatment Effects, Surface Treatment VI
CountryGreece
CityCrete
Period3/11/033/13/03

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Morino, K., Kawagoishi, N., Chen, Q., Fukada, K., & Kondo, E. (2003). Internal fracture process in fatigue of radical nitrided bearing steel. In C. A. Brebbia, J. T. M. Hosson, & S-I. Nishida (Eds.), Surface Treatment VI: Computer Methods and Experimental Measurements for Surface Treatment Effects (pp. 213-222). (Computational and Experimental Methods; Vol. 7).