固溶炭素を含むフェライト鋼の疲労限およびコーキシング効果に及ぼす Mn 添加の影響

Translated title of the contribution: Influence of Mn addition on fatigue limit and coaxing effect in ferritic steel containing solute carbon

Yusui Uchida, Motomichi Koyama, Yoshihiro Fukushima, Kaneaki Tsuzaki

Research output: Contribution to journalArticle

Abstract

The influence of Mn addition on fatigue properties of ferritic steel containing solute carbon was examined using rotating bending fatigue tests on water-quenched Fe-0.016C-1.9Mn ferritic-pearlitic steel containing 0.0035 mass% solute carbon in comparison with water-quenched Fe-C ferritic steels containing 0.0063-0.017 mass% solute carbon. The fatigue tests were carried out at ambient temperature around 300 K and a frequency of 50 Hz with a stress ratio of –1. The Fe-C-Mn steel exhibited a comparable hardness and fatigue limit to the water-quenched Fe-0.017C ferritic steel which contains about three times the amount of solute carbon than the Fe-C-Mn steel. In addition, the Fe-C-Mn steel exhibited a comparable coaxing effect to the Fe-0.017C ferritic steel when started from a stress amplitude near the fatigue limit. Crack initiation sites were changed by stress amplitude unlike in the Fe-C ferritic steels. Specifically, intergranular cracks were observed at high stress amplitudes and transgranular cracks were observed at low stress amplitudes near fatigue limit. It was concluded that the Mn addition suppresses intergranular cracking at the low stress amplitudes.

Translated title of the contributionInfluence of Mn addition on fatigue limit and coaxing effect in ferritic steel containing solute carbon
Original languageJapanese
Pages (from-to)112-122
Number of pages11
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume106
Issue number6
DOIs
Publication statusPublished - Jun 2020

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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