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HomeKey Engineering MaterialsKey Engineering Materials Vols. 340-341Superplastic Properties and Microstructure of...

Superplastic Properties and Microstructure of Friction Stir Welded Joints of Zn-22wt.%Al Alloy

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Abstract:

Deformation mechanism of room-temperature superplasticity in Zn-22wt%Al alloy was investigated by the direct observation during deformation. It was revealed that the dominant deformation mechanism of room-temperature superplasticity was grain boundary sliding. Also, superplastic properties and microstructure of friction stir welded Zn-22wt.%Al alloy were investigated, where Friction Stir Welding (FSW) has received a great deal of attention as a new solid-state welding technique. A sound jointing material was obtained successfully, and extremely fine and equiaxed grains were created in the stir zone. In addition, it was indicated that superplastic forming of the FSWed Zn-22wt.%Al alloy could be feasible. However, the tensile strength and elongation of the joint at room temperature were lower than that of the base material.

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Periodical:

Key Engineering Materials (Volumes 340-341)

Pages:

1417-1424

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.340-341.1417

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Online since:

June 2007

Authors:

Tsutomu Tanaka, Tomotake Hirata, Chung Sung Wook, Yorinobu Takigawa, Kenji Higashi

Keywords:

Friction Stir Welding (FSW), Superplasticity, Zn-22wt%Al Alloy

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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