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, Masaki Omiya, Jun Komotori, A. Sugeta, Y. Nakai

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)3432-3438
Number of pages7
JournalProcedia Structural Integrity
Volume2
DOIs
Publication statusPublished - 2016 Jan 1

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Keywords

  • Fatigue
  • Four-point bending
  • Induction heating
  • Nitriding
  • Surface modification
  • Titanium alloy

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Civil and Structural Engineering
  • Materials Science(all)

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