Superelastic response of low-modulus porous beta-type Ti-35Nb-2Ta-3Zr alloy fabricated by laser powder bed fusion

Noman Hafeez, Jia Liu, Liqiang Wang, Daixiu Wei, Yujin Tang, Weijie Lu, Lai Chang Zhang

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This work investigated the superelastic response of the low-modulus porous β type Ti-35Nb-2Ta-3Zr scaffolds with different pore dimensions fabricated by laser powder bed fusion. The superelastic behavior was enhanced with increasing the pore size and stress-induced phase transformation, which correspondingly led to stress-induced α" [110]-type I twin martensitic transformation and ω formation adjacent to β matrix/twins. The resultant interstitial compound phase structure facilitated the β → α" and β → ω transition, which was triggered by interfacial stress/strain concentration and high-density dislocations. Substantial high-angle grain boundaries (HAGBs) accumulated high-intensity Schimd factor and crystallographic texture after being deformed. Moreover, a lower Young's modulus was obtained when the pore size and stress increased.

Original languageEnglish
Article number101264
JournalAdditive Manufacturing
Volume34
DOIs
Publication statusPublished - 2020 Aug

Keywords

  • Laser powder bed fusion
  • Superelastic properties
  • Young's modulus
  • α Twin martensite

ASJC Scopus subject areas

  • Biomedical Engineering
  • Materials Science(all)
  • Engineering (miscellaneous)
  • Industrial and Manufacturing Engineering

Fingerprint Dive into the research topics of 'Superelastic response of low-modulus porous beta-type Ti-35Nb-2Ta-3Zr alloy fabricated by laser powder bed fusion'. Together they form a unique fingerprint.

  • Cite this