Effect of the ultrasonic surface rolling process on the fretting fatigue behavior of Ti-6Al-4V alloy

Chengsong Liu, Daoxin Liu, Xiaohua Zhang, Shouming Yu, Weidong Zhao

Research output: Contribution to journalArticlepeer-review

73 Scopus citations

Abstract

The effect of the ultrasonic surface rolling process (USRP) on the rotary bending fretting fatigue (FF) of Ti-6Al-4V alloy was investigated. The reason for the USRP's ability to improve the FF resistance of Ti-6Al-4V alloy was studied. The results revealed that the USRP induced a compressive residual stress field with a depth of 530 µm and a maximum residual stress of −930 MPa. Moreover, the surface micro-hardness of the USRP sample was significantly higher than that of the untreated base material (BM) sample, and the USRP yielded a 72.7% increase in the FF limit of the alloy. These further enhanced fatigue properties contributed mainly to the compressive residual stress field with large numerical value and deep distribution, which could effectively suppress FF crack initiation and early propagation. The USRP-induced surface work-hardening had only a minor impact on the FF resistance.

Original languageEnglish
Article number833
Pages (from-to)833
Number of pages1
JournalMaterials
Volume10
Issue number7
DOIs
StatePublished - 20 Jul 2017

Keywords

  • Compressive residual stress
  • Fretting fatigue (FF)
  • Surface work-hardening
  • Ti-6Al-4V alloy
  • Ultrasonic surface rolling process (USRP)

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