Formation of nitrided layer using atmospheric-controlled IH-FPP and its effect on the fatigue properties of Ti-6Al-4V alloy under four-point bending

S. Kikuchi, S. Ota, H. Akebono, M. Omiya, J. Komotori, A. Sugeta, Y. Nakai

研究成果: Article査読

8 被引用数 (Scopus)

抄録

The purpose of this study is to develop a rapid nitriding using a surface modification which is a combination of atmospheric-controlled induction-heating fine particle peening (AIH-FPP) and nitrogen gas blow. AIH-FPP was performed for titanium alloy (Ti-6Al-4V ELI grade) at 1173 K for 180 s in a controlled nitrogen atmosphere with an oxygen concentration less than 10 ppm without supplying particles. A nitrogen compound (TiN) was formed on the AIH-FPP treated surface, which results in increasing the surface hardness of Ti-6Al-4V alloy. To examine the effect of AIH-FPP on the fatigue properties of Ti-6Al-4V alloy, four-point bending fatigue tests were performed at a stress ratio of 0.1 in air at room temperature. It was found that the AIH-FPP treated specimens showed low fatigue limit due to the formation of a brittle compound layer and coarse microstructure.

本文言語English
ページ(範囲)3432-3438
ページ数7
ジャーナルProcedia Structural Integrity
2
DOI
出版ステータスPublished - 2016

ASJC Scopus subject areas

  • 機械工学
  • 材料力学
  • 土木構造工学
  • 材料科学(全般)

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