The strain rate and temperature dependence of microstructural evolution of Ti-15Mo-5Zr-3Al alloy

Woei Shyan Lee, Chi Feng Lin, Tao Hsing Chen, Hsin Hwa Hwang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

A compressive split-Hopkinson pressure bar apparatus and transmission electron microscopy (TEM) are used to investigate the deformation behaviour and microstructural evolution of Ti-15Mo-5Zr-3Al alloy deformed at strain rates ranging from 8 × 102 s-1 to 8 × 103 s-1 and temperatures between 25 °C and 900 °C. In general, it is observed that the flow stress increases with increasing strain rate, but decreases with increasing temperature. The microstructural observations reveal that the strengthening effect evident in the deformed alloy is a result, primarily, of dislocations and the formation of α phase. The dislocation density increases with increasing strain rate, but decreases with increasing temperature. Additionally, the square root of the dislocation density varies linearly with the flow stress. The amount of α phase increases with increasing temperature below the β transus temperature. The maximum amount of α phase is formed at a temperature of 700 °C and results in the minimum fracture strain under the current loading conditions.

Original languageEnglish
Pages (from-to)1568-1575
Number of pages8
JournalJournal of Materials Science
Volume43
Issue number5
DOIs
Publication statusPublished - 2008 Mar 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'The strain rate and temperature dependence of microstructural evolution of Ti-15Mo-5Zr-3Al alloy'. Together they form a unique fingerprint.

Cite this