Microstructure and tensile properties of Ti-Mo alloys manufactured via using laser powder bed fusion

Nan Kang, Yunlong Li, Xin Lin, Enhao Feng, Weidong Huang

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

In this work, the dense Ti-7.5Mo sample (over 99.5%) was prepared by using laser powder bed fusion (L-PBF) from powder mixture of pure Ti and pure Mo. Through the use of mechanical mixture process, Mo particles present an uniform distribution. As the laser scanning speed decreases from 1700 mm/s to 1000 mm/s, the sample's relative density increases from 85.5% to 99.5%. The microstructural analysis indicates that Mo particle was mostly fully melted during laser melting. But, some large sized Mo particles were partial melted, which possesses gradient interface structure. Then, the tensile properties of as-fabricated samples under several laser scanning speed were determined. The results shows that the as-fabricated dense sample presents Young's modulus, ultimate tensile strength and strain at failure about of 70 GPa, 740 MPa and 9.2% respectively. Given to this low Young's modulus, which is approximate to bone of 30 GPa, the L-PBF processed Ti-7.5Mo shows great application potential in implant component.

Original languageEnglish
Pages (from-to)877-884
Number of pages8
JournalJournal of Alloys and Compounds
Volume771
DOIs
StatePublished - 15 Jan 2019

Keywords

  • Laser powder bed fusion
  • Powder mixture
  • Tensile properties
  • Ti-Mo alloy
  • Young's modulus

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