Rotating bending fatigue property of SCM435 during electrochemical hydrogen charging

Ryo Kawakami, Kazumasa Kubota, Hisao Matsunaga

Research output: Contribution to journalArticle

Abstract

The method of rotating bending fatigue test under an electrochemical hydrogen-charging was established, by which the fatigue tests were carried out for a JIS-SCM435 to study the effect of hydrogen on fatigue strength. The fatigue life of the specimen was degraded by hydrogen -charging in relatively low fatigue life regime, where the slope of S-N curve for the hydrogen-charged specimens was equivalent to that for no-charged specimens. The fatigue strength on 50% failure probability at 107 cycles under the hydrogen-charging was slightly lower than that under the hydrogen-free condition. On the surface of the non-charged specimen that was run-out at 107 cycles, a number of cracks up to ≈100 μm in length was observed. By contrast, in the hydrogen-charged specimen, no crack was observed after the fatigue testing. These results suggested that the hydrogen-charging had a negative infiuence on the fatigue limit as well as fatigue life of the alloy used in this study.

Original languageEnglish
Pages (from-to)92-98
Number of pages7
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume84
Issue number3
DOIs
Publication statusPublished - 2020

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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