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 journalArticlepeer-review

9 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
Pages (from-to)563-566
Number of pages4
JournalCIRP Annals
Volume67
Issue number1
DOIs
Publication statusPublished - 2018 Jan 1

Keywords

  • Laser
  • Nitriding
  • Surface modification
  • Titanium

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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