Fabrication of commercial pure Ti by selective laser melting using hydride-dehydride titanium powders treated by ball milling

Wei Xu, Shiqi Xiao, Xin Lu, Gang Chen, Chengcheng Liu, Xuanhui Qu

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

Micro-fine sphericalpowders are recommended for selective laser melting (SLM). However, they are mostly expensive due to the complex manufacturing technique and low yield. In this paper, using low-cost treated hydride-dehydride (HDH) Ti powders, commercial pure Ti (CP-Ti) was successfully fabricated by SLM. After 4-h milling, the resulting powders become near-spherical with no obvious angularity, and have optimal flowability with the apparent density of 1.64 ± 0.02 g/cm3, tap density of 2.10 ± 0.04 g/cm3, angle of repose 40.11°±0.09° and Carr's index of 77.74 ± 0.15. The microstructure was determined with full acicular martensitic α′ phase. The CP-Ti can achieve superior mechanical properties with the ultimate tensile strength of 876.1 ± 20.5 MPa and elongation of (14.7 ± 0.5)%, which exhibit distinctly competitive compared to the as-cast CP-Ti or Ti-6Al-4V. Excellent mechanical properties together with its low-cost make SLM-fabricated CP-Ti from modified HDH Ti powders show promising applications.

Original languageEnglish
Pages (from-to)322-327
Number of pages6
JournalJournal of Materials Science and Technology
Volume35
Issue number2
DOIs
Publication statusPublished - 2019 Feb
Externally publishedYes

Keywords

  • Hydride-dehydride powders
  • Mechanical properties
  • Microstructure
  • Selective laser melting
  • Titanium

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Polymers and Plastics
  • Metals and Alloys
  • Materials Chemistry

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