Fatigue strength of a vacuum-carburised TRIP-aided martensitic steel

Koh ichi Sugimoto, Tomohiko Hojo, Yuta Mizuno

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Fatigue properties of a transformation-induced plasticity-aided martensitic steel subjected to vacuum carburisation under carbon potentials ranging from 0.70 to 0.80 mass% and subsequent fine-particle peening were investigated for the fabrication of precision transmission gears. The fatigue limits of smooth specimens increased by 34–41% with increasing carbon potential, compared with that of heat-treated and fine-particle peened steel. The notched fatigue limits increased to a lesser degree except in case of carbon potential of 0.70 mass%. The increased smooth fatigue limits were associated with the high Vickers hardness and compressive residual stress via severe plastic deformation and the strain-induced martensitic transformation during fine-particle peening, as well as a 50% reduction of retained austenite fraction during fatigue deformation.

本文言語English
ページ(範囲)743-750
ページ数8
ジャーナルMaterials Science and Technology (United Kingdom)
34
6
DOI
出版ステータスPublished - 2018 4 13

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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