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Indexed by:期刊论文

Date of Publication:2015-01-01

Journal:MATERIALS TRANSACTIONS

Included Journals:SCIE、EI、Scopus

Volume:56

Issue:8

Page Number:1242-1247

ISSN No.:1345-9678

Key Words:magnesium alloy; T-joint; laser-TIG hybrid heat source; weldability

Abstract:The weldability of magnesium alloy T-joint using laser-TIG hybrid welding heat source with cold filler wire was studied in this paper. The effects of welding parameters (wire feeding angle a, wire feeding speed V-W, welding speed V shielding gas flow rate acts on either of the connect corner Q(C), the distance between filler wire and laser beam D-LW) on weld appearance and penetration were discussed. Results show that high-quality magnesium alloy T-joint can be achieved by adjusting the parameters. Shearing test result indicates that shear strength of the T-joint welded by laser-TIG heat source can be as high as 92.3% of that of base metal.