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Research on Laser-TIG Hybrid Welding of 6061-T6 Aluminum Alloys Joint and Post Heat Treatment

Key Laboratory of Liaoning Advanced Welding and Joining Technology & School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China
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Metals 2020, 10(1), 130; https://doi.org/10.3390/met10010130 (registering DOI)
Received: 22 November 2019 / Revised: 2 January 2020 / Accepted: 7 January 2020 / Published: 15 January 2020
(This article belongs to the Special Issue Structure and Properties of Aluminium Alloys)
The 6061-T6 aluminum (Al) alloys was joined by the laser induced tungsten inert gas (TIG) hybrid welding technique. It mainly studied the influences of welding parameters, solution, and aging (STA) treatment on the microstructure and tensile properties of Al alloy hybrid welding joints. Microstructures of the joints were also analyzed by optical microscopy and transmission electron microscopy. Results showed that the laser induced arc hybrid welding source changed the microstructure of the fusion zone and heat effect zone. STA treatment effectively improved the mechanical properties of the softening area in the hybrid welding joint, whose values of the tensile strength and elongation were on average 286 MPa and 20.5%. The distribution of the reinforcement phases and dislocations distributed were more uniform, which improved the property of STA treated joint. View Full-Text
Keywords: Al alloy; laser induced arc hybrid welding; heat treatment; microstructure Al alloy; laser induced arc hybrid welding; heat treatment; microstructure
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Wang, H.; Liu, X.; Liu, L. Research on Laser-TIG Hybrid Welding of 6061-T6 Aluminum Alloys Joint and Post Heat Treatment. Metals 2020, 10, 130.

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