Wear and fretting fatigue behavior of titanium alloy coated with functionally graded TiN film by ion beam assisted deposition

• NAKATANI Masanori

  Department of Mechanical Engineering, University of Hyogo

• SHIMIZU Shota

  Graduate school of Engineering, University of Hyogo

• HARADA Yasunori

  Department of Mechanical Engineering, University of Hyogo

• UCHIDA Hitoshi

  University of Hyogo

Bibliographic Information

Other Title

• イオンビーム援用傾斜機能性TiNコーティングを施したチタン合金の摩耗およびフレッティング疲労特性

Abstract

The effect of functionally graded TiN coating on the wear and fretting fatigue behavior of titanium alloy was investigated. The two kinds of monolayer TiN coatings and three kinds of functionally graded TiN coatings were deposited on Ti-6Al-4V alloy substrate using an ion beam assisted deposition technique. Monolayer TiN coating was fabricated by an electron beam evaporation of titanium and simultaneous nitrogen ion bombardment at the acceleration voltage of 0.2 or 2.0 keV. The later consisted of top TiN layer and functionally graded layer. During the fabrication of functionally graded layer, the mixing ratio of nitrogen and argon gas that were used for the generation of ion beam increased stepwisely. The mixed layer formed by ion beam bombardment became thicker by an increase in acceleration voltage. The adhesion and wear resistance improved with an increase in the acceleration voltage. Moreover, inserting the functionally graded layer with the layer thickness of 250 nm improved them significantly. However, further increase in graded layer thickness deteriorated the adhesion and wear resistance. The fretting fatigue life was evaluated by a four-point bending fatigues test. The fretting fatigue life of specimen coated with monolayer TiN film was longer than that of uncoated specimen. The TiN coating with functionally graded layer was the most effective to improve the fretting fatigue life. It was concluded that the insert of functionally graded layer with appropriate layer thickness is effective way for improvement of wear and fretting fatigue behavior.

Journal

• Transactions of the JSME (in Japanese)

  Transactions of the JSME (in Japanese) 81 (824), 14-00590-14-00590, 2015

  The Japan Society of Mechanical Engineers

Keywords

• Fretting fatigue
• Wear
• Adhesion
• Titanium nitride
• Functionally graded coating
• Ion beam assisted deposition
• Titanium alloy

Details

• CRID: 1390001205515682560
• NII Article ID: 130005066599
• DOI: 10.1299/transjsme.14-00590
• ISSN: 21879761
• Web Site: https://www.jstage.jst.go.jp/article/transjsme/81/824/81_14-00590/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed