|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Friction Stir Welding and Processing IX
||Microstructure and Mechanical Properties of Beta-type Ti-15V-3Cr-3Al-3Sn Alloy Joints Fabricated by Friction Stir Welding
||Huihong Liu, Hidetoshi Fujii
|On-Site Speaker (Planned)
Ti-15V-3Cr-3Al-3Sn (Ti-15-3), as a commercial beta-type titanium alloy, has been used for aerospace applications because of its excellent mechanical properties, cold formability, and aging strengthening response. Conventional fusion welding is known to cause several issues such as the formation of columnar grains, high residual stress, large deformation, and macro segregation which deteriorate the quality of the weld joints. Friction stir welding (FSW) is an innovative joining technique enabling solid-state joining thereby facilitating the avoidance or minimization of fusion-welding-associated problems. In this study, FSW with various processing conditions was performed on the Ti-15-3 alloy. Microstructural evolution and mechanical properties of weld joints were systematically investigated in order to optimize the welding conditions to obtain a sound joint. Additionally, since previous studies mainly focused on the FSW of alpha- and (alpha+beta)-type titanium alloys rather than the beta-type alloys, this study also provides a complement understanding of the FSW of titanium alloys.
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