Temperature dependence of activation enthalpy for yielding in bimodal Ti6Al4V

Bhargavi Rani Anne, Masaki Tanaka, Tatsuya Morikawa

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1 Citation (Scopus)

Abstract

Mechanical properties relating to the thermally activated process of yielding was investigated in Ti6Al4V with a bimodal microstructure, consisting of both primary alpha grains and lamellar colonies of secondary alpha/beta lamellae. The temperature dependence of yield stress, effective stress, activation volume, and activation enthalpy were investigated between 77 K and 650 K. The yield stress and effective stress decreased with increasing temperature. It was found that the temperature dependence of activation enthalpy for yielding shows values between those obtained from basal slips and prismatic slips investigated in single crystalline α-titanium. This suggests that the thermally activated processes which control the yielding of bimodal Ti6Al4V is the combination of basal and prismatic slips.

Original languageEnglish
Pages (from-to)1828-1832
Number of pages5
JournalMaterials Transactions
Volume60
Issue number9
DOIs
Publication statusPublished - Jan 1 2019

All Science Journal Classification (ASJC) codes

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

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