Strengthening of Β Ti-6Cr-3Sn alloy through Β grain refinement, α phase precipitation and resulting effects on shape memory properties

A. Wadood, T. Inamura, Y. Yamabe-Mitarai, H. Hosoda

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Our recently developed Ti-6Cr-3Sn alloy exhibited shape memory effect and large fracture strain. However Ti-6Cr-3Sn alloy exhibited partial shape memory effect and low ultimate tensile strength (UTS). Then in this study, effects of decrease in Β grain size on the mechanical and shape memory properties of Β Ti-6Cr-3Sn alloy were investigated. Results of decrease in Β grain size were also compared with our recently reported uniform α phase precipitated Ti-6Cr-3Sn alloy. It was investigated that decrease in Β grain size was found effective in improving the strength, fracture strain and shape memory properties of Β Ti-6Cr-3Sn alloy due to the increase in critical stress for slip deformation. On the other hand, uniform precipitation of α phase in Β matrix of Ti-6Cr-3Sn alloy was found much more effective than decrease in Β grain size in improving the strength and shape memory properties of Β Ti-6Cr-3Sn alloy. However fracture strain of uniform α phase precipitated Ti-6Cr-3Sn alloy was lower than coarse and fine Β grain Ti-6Cr-3Sn alloy. It is concluded that decreasing Β grain size was found as effective way to improve the mechanical and shape memory properties altogether of Β Ti-6Cr-3Sn shape memory alloy. However decrease in Β grain size was found less effective than our recently reported effect of uniform precipitation of α phase in Β matrix of Β Ti-6Cr-3Sn alloy.

Original languageEnglish
Pages (from-to)829-835
Number of pages7
JournalMaterials Science and Engineering A
Volume559
DOIs
Publication statusPublished - 2013 Jan 1
Externally publishedYes

Keywords

  • Grain refinement
  • Precipitation
  • Shape recovery
  • Strength
  • Β-Titanium

ASJC Scopus subject areas

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

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