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Effect of HIP Treatment on Fatigue Crack Growth Behavior of Ti–6Al–4V Alloy Fabricated by Electron Beam Melting

Authors
  • Liu, Yan1
  • Zhang, Jun1
  • Li, Shu-Jun2
  • Hou, Wen-Tao2
  • Wang, Hao2
  • Xu, Qin-Si2
  • Hao, Yu-Lin2
  • Yang, Rui2
  • 1 Shenyang University, College of Mechanical Engineering, Shenyang, 110044, China , Shenyang (China)
  • 2 Institute of Metal Research, Chinese Academy of Sciences, Shenyang National Laboratory for Materials Science, Shenyang, 110016, China , Shenyang (China)
Type
Published Article
Journal
Acta Metallurgica Sinica (English Letters)
Publisher
The Chinese Society for Metals
Publication Date
Oct 13, 2017
Volume
30
Issue
12
Pages
1163–1168
Identifiers
DOI: 10.1007/s40195-017-0665-5
Source
Springer Nature
Keywords
License
Yellow

Abstract

The effect of hot isostatic pressing treatment on the fatigue crack growth behavior of Ti–6Al–4V alloy fabricated by electron beam melting was investigated. The results indicate that the fatigue crack growth rate of the HIPed samples is higher than that of the as-fabricated one under certain stress intensity factor (ΔK < 18 MPa m1/2). With further increase in ΔK, the fatigue crack growth rates of the studied two samples become similar. The variation of α lamella thickness and the pore defects distribution have an effect on the fatigue crack growth rates in the studied samples, and the latter plays the dominant role.

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