J. Mater. Sci. Technol. ›› 2018, Vol. 34 ›› Issue (7): 1127-1131.DOI: 10.1016/j.jmst.2017.12.003

Special Issue: Titanium Alloys 2018

• Orginal Article • Previous Articles     Next Articles

Heat treatment enhancing the compressive fatigue properties of open-cellular Ti-6Al-4V alloy prototypes fabricated by electron beam melting

Wei Yuana, Wentao Houb, Shujun Lib(), Yulin Haob, Rui Yangb, Lai-Chang Zhangc, Yue Zhua()   

  1. aDepartment of Orthopedics, First Hospital of China Medical University, Shenyang, 110001, China
    bShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
    cSchool of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA, 6027, Australia
  • Received:2017-08-23 Revised:2017-10-29 Accepted:2017-11-17 Online:2018-07-10 Published:2018-07-22

Abstract:

: In this work, we report the effect of annealing in α+β phase field on the fatigue properties of Ti-6Al-4V alloy meshes fabricated by electron beam melting. The results show that annealing at high temperature near the phase boundary enhances the ductility of the brittle mesh struts due to the formation of coarse α lamellas with a large thickness/length ratio. Accordingly, the fatigue endurance ratio of the studied meshes increases to up to -0.6, which is much superior to that of the as-fabricated counterparts and comparable to those of dense materials.

Key words: Titanium alloy, Reticulated mesh, Annealing treatment, Morphology, Fatigue endurance