The Effect of Modulation Ratio of Cu/Ni Multilayer Films on the Fretting Damage Behaviour of Ti-811 Titanium Alloy

Xiaohua Zhang, Daoxin Liu, Xiaoying Li, Hanshan Dong, Yuntao Xi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

To improve the fretting damage (fretting wear and fretting fatigue) resistance of Ti-811titanium alloy, three Cu/Ni multilayer films with the same modulation period thickness (200 nm) and different modulation ratios (3:1, 1:1, 1:3) were deposited on the surface of the alloy via ion-assisted magnetron sputtering deposition (IAD). The bonding strength, micro-hardness, and toughness of the films were evaluated, and the effect of the modulation ratio on the room-temperature fretting wear (FW) and fretting fatigue (FF) resistance of the alloy was determined. The results indicated that the IAD technique can be successfully used to prepare Cu/Ni multilayer films, with high bonding strength, low-friction, and good toughness, which yield improved room-temperature FF and FW resistance of the alloy. For the same modulation period (200 nm), the micro-hardness, friction, and FW resistance of the coated alloy increased, decreased, and improved, respectively, with increasing modulation ratio of the Ni-to-Cu layer thickness. However, the FF resistance of the coated alloy increased non-monotonically with the increasing modulation ratio. Among the three Cu/Ni multilayer films, those with a modulation ratio of 1:1 can confer the highest FF resistance to the Ti-811 alloy, owing mainly to their unique combination of good toughness, high strength, and low-friction.
Original languageEnglish
Pages (from-to)585
Number of pages13
JournalMaterials
Volume10
Issue number6
Early online date26 May 2017
DOIs
Publication statusPublished - 2017

Keywords

  • titanium alloy
  • modulation ratio
  • fretting fatigue
  • fretting wear
  • multilayer film

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