Effects of fine particle peening on torsional fatigue strength of a trip-aided bainitic ferrite steel

Yuta Mizuno, Tomohiko Hojo, Koh Ichi Sugimoto

研究成果: Article査読

抄録

The effects of fine particle peening (FPP) on the torsional fatigue properties were investigated in the case of a transformation-induced plasticity (TRIP)-aided bainitic ferrite (TBF) steel that has potential for use in precision gears. FPP resulted in a significant increase in the torsional fatigue limit of the TBF steel, compared with that of a quenched and tempered SNCM420 steel. An increase in the torsional fatigue limit was larger than that in the rotating bending fatigue limit. In addition, the crack growth rate and the threshold stress intensity range of this steel were lower and higher, respectively, than those of its SNCM420 counterpart. These differences resulted from the TBF steel having a higher (1) Vickers hardness, (2) compressive residual stress, and (3) volume fraction of untransformed retained austenite in the surface hardened layer, which suppressed crack initiation and extension.

本文言語English
ページ(範囲)853-858
ページ数6
ジャーナルZairyo/Journal of the Society of Materials Science, Japan
64
11
DOI
出版ステータスPublished - 2015
外部発表はい

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

フィンガープリント 「Effects of fine particle peening on torsional fatigue strength of a trip-aided bainitic ferrite steel」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル