Effect of Post Weld Heat Treatment on Microstructures and Mechanical Properties of AZ31B Friction Welded Joint
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- Fukumoto S.
- Graduate school of Engineering, University of Hyogo
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- Yamamoto D.
- Graduate school of Engineering, University of Hyogo
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- Tomita T.
- Hyogo prefectural institute of technology
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- Okita K.
- Osaka Sangyo University
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- Tsubakino H.
- Graduate school of Engineering, University of Hyogo
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- Yamamoto A.
- Graduate school of Engineering, University of Hyogo
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Abstract
AZ31 magnesium alloy was welded by friction welding and the effect of post weld heat treatment on microstructures and mechanical properties were investigated. Fine grained microstructure whose minimum grain size is approximately 1 μm was formed at the weld interface by dynamic recrystallization due to hot-heavy working. Although abnormal grain growth which is often found in stir zone in friction stir welding occurred near weld interface where the material was work hardened, the area was limited and did not affect the mechanical properties of weld interface. The tensile and fatigue strength of as weld joints were equal to those of base metal and did not decrease until grain size increased to approximately 15 μm. The decrease in the Hall-Petch slope was found when the grain size decreased less than 3 μm in grain size in terms of yield stress.
Journal
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 48 (1), 44-52, 2007
The Japan Institute of Metals and Materials
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Details 詳細情報について
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- CRID
- 1390001204249461888
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- NII Article ID
- 130004453336
- 10018666039
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- NII Book ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL BIB ID
- 8597237
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed