J. Mater. Sci. Technol. ›› 2016, Vol. 32 ›› Issue (6): 505-508.DOI: 10.1016/j.jmst.2016.03.020

• Orginal Article • Previous Articles     Next Articles

Electron Beam Melted Beta-type Ti-24Nb-4Zr-8Sn Porous Structures With High Strength-to-Modulus Ratio

Yujing Liu1, 2, Shujun Li2, *, Wentao Hou2, Shaogang Wang2, Yulin Hao2, Rui Yang2, Timothy B. Sercombe3, Lai-Chang Zhang1, **   

  1. 1 School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA 6027, Australia; 2 Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; 3 School of Mechanical and Chemical Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
  • Received:2016-02-18 Online:2016-06-10
  • Contact: Corresponding author. Ph.D.; Tel.: +86 24 8397 8841; Fax: +86 24 2397 2021. (S. Li). E-mail address: shjli@imr.ac.cn (S. Li). Corresponding author. Ph.D.; Tel.: +61 8 6304 2322; Fax: +61 8 6304 5811. (L.-C. Zhang). E-mail address: lczhangimr@gmail.com; l.zhang@ecu.edu.au (L.-C. Zhang).
  • Supported by:
    This work was supported partially by the National High-Tech R&D Program of China (863 Program, No. 2015AA033702), the National Basic Research Program of China (Nos. 2012CB619103 and 2012CB933901), the National Natural Science Foundation of China (Nos. 51271182 and 51501200) and the Australian Research Council Discovery Project (Nos. DP110101653 and DP130103592).

Abstract: Electron beam melting (EBM) has been used to manufacture β-type Ti-24Nb-4Zr-8Sn porous components with 70% porosity. EBM-produced components have favorable structural features (i.e. smooth strut surfaces, fewer defects) and an (α?+?β)-type microstructure, similar to that subjected to aging treatment. EBM-produced components exhibit more than twice the strength-to-modulus ratio of porous Ti-6Al-4V components having the same porosity. The processing-microstructure-property relationship and deformation behavior of EBM-produced components are discussed in detail. Such porous titanium components composed of non-toxic elements and having high strength-to-modulus ratio are highly attractive for biomedical applications.

Key words: Titanium alloys, Electron beam melting, Porous material, Mechanical properties, Microstructure