Improvement of Uniform Elongation by Low Temperature Annealing in Al-2.5%Mg Alloy Processed by Accumulative Roll Bonding
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- Kashihara Keizo
- National Institute of Technology, Wakayama College
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- Komi Yoshikazu
- National Institute of Technology, Wakayama College
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- Terada Daisuke
- Kyoto University
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- Tsuji Nobuhiro
- Kyoto University
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Abstract
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.
Journal
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 56 (6), 803-807, 2015
The Japan Institute of Metals and Materials
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Keywords
Details 詳細情報について
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- CRID
- 1390001204252720128
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- NII Article ID
- 40020473901
- 130005072151
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- NII Book ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL BIB ID
- 026412745
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed