Temperature Dependence of Activation Enthalpy for Yielding in Bimodal Ti–6Al–4V

• Anne Bhargavi Rani

  Department of Materials Science and Engineering, Graduate School of Engineering, Kyushu University

• Tanaka Masaki

  Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University

• Morikawa Tatsuya

  Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University

抄録

Mechanical properties relating to the thermally activated process of yielding was investigated in Ti–6Al–4V 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 Ti–6Al–4V is the combination of basal and prismatic slips.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 60 (9), 1828-1832, 2019-07-01

  公益社団法人 日本金属学会

キーワード

• dislocation glide
• activation energy
• effective stress
• titanium alloy

詳細情報

• CRID: 1390564238110654208
• NII論文ID: 130007695356
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.me201902
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 029912158
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I029912158
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/60/9/60_ME201902/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可