On fish-eye fracture of radical nitrided die steel

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

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

Abstract

In order to investigate the effect of radical nitriding on fatigue strength of die steel, rotating bending fatigue tests were carried out at room temperature and 450°C. Fatigue strength was increased by nitriding at both temperatures due to surface hardening and compressive residual stress generated in the surface region. Comparing with the non-nitrided steel in which the fracture origin was at surface slip bands or surface defects, the nitrided steel fractured with the origin at inner inclusions at both temperatures. In the nitrided steel, cracks initiated from inclusions in the non-hardened layer or near the boundary between hardened and non-hardened layers. The difference in fatigue strength between the two temperatures was discussed based on the feature of fish-eye.

Original languageEnglish
Title of host publicationSurface Treatment V
Subtitle of host publicationComputer methods and Experimental Measurements
EditorsB. Sarler, C.A. Brebbia, C.A. Brebbia
Pages209-217
Number of pages9
Volume6
Publication statusPublished - Dec 1 2001
Externally publishedYes
EventFifth International Conference on Computer Methods and Experimental Measurements for Surface Treatment Effects, Surface Treatment V - Seville, Spain
Duration: Jun 20 2001Jun 22 2001

Other

OtherFifth International Conference on Computer Methods and Experimental Measurements for Surface Treatment Effects, Surface Treatment V
CountrySpain
CitySeville
Period6/20/016/22/01

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Kawagoishi, N., Morino, K., Fukada, K., Chen, Q., & Kondo, E. (2001). On fish-eye fracture of radical nitrided die steel. In B. Sarler, C. A. Brebbia, & C. A. Brebbia (Eds.), Surface Treatment V: Computer methods and Experimental Measurements (Vol. 6, pp. 209-217)