Rapid surface nitriding of titanium alloy by a nanosecond fiber laser under atmospheric conditions

Kazutoshi Katahira, Yusuke Tanida, Shogo Takesue, Jun Komotori

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A modified surface layer using a Yb nanosecond fiber laser beam under atmospheric conditions was fabricated by applying a surface nitriding process on disc-shaped Ti–6Al–4V samples. On the generated surface, a melt layer comprising a TiN dendrite structure and a heat affected zone containing a needle-like α phase were detected. The modified layer exhibited optimal characteristics with the treatment at a laser output power of 12 W, resulting in a hardness of 12 GPa. The results of friction wear evaluation tests revealed that the layer exhibited superior abrasion resistance compared with an untreated Ti–6Al–4V substrate.

Original languageEnglish
JournalCIRP Annals
DOIs
Publication statusAccepted/In press - 2018 Jan 1

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Keywords

  • Laser
  • Nitriding
  • Surface modification
  • Titanium

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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