Effect of Revolutionary Pitch on the Microhardness Drop and Tensile Properties of Friction Stir Processed 1050 Aluminum Alloy
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- Chen Ssu-Ta
- Department of Materials Science and Engineering, National Cheng Kung University
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- Lui Truan-Sheng
- Department of Materials Science and Engineering, National Cheng Kung University
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- Chen Li-Hui
- Department of Materials Science and Engineering, National Cheng Kung University
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Friction stir processed (FSPed) aluminum alloys generally exhibit good mechanical properties pertaining to the textural feature, dynamic recrystallization (DRX), aging effect and are commonly accompanied by a thermal mechanical affected zone (TMAZ), and these are important metallurgical factors which cause inhomogeneous deformation problems. Therefore, a 1050 aluminum alloy sheet was used to eliminate the aging effect on the microhardness distribution and tensile properties. From the microhardness profile, a significant data fluctuation variation and microhardness drop could be recognized as the feeding speed slowed to 1.1 mm/s. It is reasonable to suggest that this is closely related to the subtle microstructural changes of dynamic recrystallized grains which were a consequence of the friction stir process heat input.<BR>In addition, a significant {110}⟨001⟩ crystal aggregation was observed in the center of SZs of O-FSPed samples, where ⟨001⟩ aligned closely along the processing direction (PD) while ⟨110⟩ aligned along the transverse direction (TD). The higher Taylor factors of the O-FSPper specimens were responsible for higher flow stress than that of the O-FSPpar specimens. One the other hand, the revolutionary pitch is an insignificant factor for tensile properties.<BR>Experimental results imply that FSP possesses great potential to improve the formability especially of cold-rolled H14 tempered sheets, as a partial modification method when a proper feeding speed is properly selected.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 50 (8), 1941-1948, 2009
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390001204250158592
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- NII論文ID
- 10025154746
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 10297746
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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