Fatigue Hardening Behavior of 1.5 GPa Grade Transformation-Induced Plasticity-Aided Martensitic Steel

Koh Ichi Sugimoto, Tomohiko Hojo

研究成果: Article査読

11 被引用数 (Scopus)

抄録

Low cycle fatigue hardening/softening behavior of a 0.2 pct C–1.5 pct Si–1.5 pct Mn–1.0 pct Cr–0.2 pct Mo–0.05 pct Nb transformation-induced plasticity (TRIP)-aided steel consisting of a wide lath martensite structure matrix and a narrow lath martensite–metastable retained austenite mixture was investigated. The steel exhibited notable fatigue hardening in the same way as TRIP-aided bainitic ferrite steel, although conventional martensitic steel such as SCM420 steel with the same tensile strength exhibited fatigue softening. The considerable fatigue hardening of this steel is believed to be associated mainly with the compressive internal stress that results from a difference in flow stress between the matrix and the martensite–austenite-like phase, with a small contribution from the strain-induced transformation and dislocation hardenings.

本文言語English
ページ(範囲)5272-5279
ページ数8
ジャーナルMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
47
11
DOI
出版ステータスPublished - 2016 11 1
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 材料力学
  • 金属および合金

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