Ti-Fe-Sn-Nb hypoeutectic alloys with superb yield strength and significant strain-hardening

Guo Hua Zhao, Sergey V. Ketov, Huahai Mao, Annika Borgenstam, Dmitri V. Louzguine-Luzgin

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

In this letter new Ti-Fe-Sn-Nb hypoeutectic alloy comprised of primary dendritic β-Ti and ultrafine (β-Ti + TiFe) eutectic was developed showing superior mechanical properties. The as-cast Ti67Fe27Sn3Nb3 (at.%) alloy exhibited exceptionally high yield stress (2.18 GPa) comparable to that of bulk metallic glasses. Most importantly, the sample presented significant strain-hardening (320 MPa) and enhanced plasticity. The slip deformation and dislocation accumulation in the β-Ti dendrite contribute to the plasticity and the pronounced strain-hardening, whereas the high strength stems from the ultrafine (β-Ti + TiFe) eutectic structure as well as the solution hardening in the multicomponent system.

Original languageEnglish
Pages (from-to)59-62
Number of pages4
JournalScripta Materialia
Volume135
DOIs
Publication statusPublished - 2017 Jul 1

Keywords

  • Hypoeutectic alloys
  • Mechanical properties, β-Ti dendrite
  • Ti-Fe-Sn-Nb

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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