Improvement of Uniform Elongation by Low Temperature Annealing in Al-2.5%Mg Alloy Processed by Accumulative Roll Bonding

• Kashihara Keizo

  National Institute of Technology, Wakayama College

• Komi Yoshikazu

  National Institute of Technology, Wakayama College

• Terada Daisuke

  Kyoto University

• Tsuji Nobuhiro

  Kyoto University

抄録

Al-2.5%Mg alloy (A5052) sheets were processed by accumulative roll bonding (ARB) for 1 to 7 cycles (equivalent strains from 0.8 to 5.6) at room temperature. The sheets processed by ARB for 7 cycles were then annealed isochronally for 30 min at temperatures in the range from 100°C to 400°C. Interestingly, it was found that the specimen annealed at 200°C followed by 7 cycles of ARB had the same level of yield stress (about 320 MPa) but a larger uniform elongation than the specimen processed by 3 cycles of ARB. The improvement in uniform elongation by low-temperature annealing is discussed in terms of the mechanism that the evolution of dislocation substructures inside ultra-fine grains causes plastic instability at a very early stage of the tensile test. Hardening by annealing was also observed in the specimen annealed at 100°C followed by 7 cycles of ARB.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 56 (6), 803-807, 2015

  公益社団法人 日本金属学会

キーワード

• aluminum magnesium alloy
• accumulative roll bonding
• severe plastic deformation
• mechanical property
• low temperature annealing
• electron backscatter diffraction
• ultrafine grains

詳細情報

• CRID: 1390001204252720128
• NII論文ID: 40020473901
• NII論文ID: 130005072151
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.l-m2015806
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 026412745
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026412745
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/56/6/56_L-M2015806/_pdf
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可