Metals and Welding TechnologyNo Access

Study of 2219 aluminum alloy using direct current A-TIG welding

Provincial Key Laboratory of Advanced Welding Technology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, P. R. China

School of Mechanical and Vehicle Engineering, Changzhou Institute of Technology, Changzhou, Jiangsu, P. R. China

E-mail Address: lihui2@czu.cn

Corresponding author.

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and

Jiasheng Zou

Provincial Key Laboratory of Advanced Welding Technology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, P. R. China

E-mail Address: zjzoujs@126.com

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https://doi.org/10.1142/S021797921744043XCited by:2 (Source: Crossref)

Abstract

Direct current A-TIG (DCEN A-TIG) welding using special active agent had eliminated the pores and the oxidation of 2219 high-strength aluminum alloy in welding. Addition of AlF₃–25% LiF active agent to DCEN A-TIG welding and arc morphology showed a trailing phenomenon. However, the change in arc morphology was not remarkable when AlF₃–75% LiF active agent was added. Addition of AlF₃–75% LiF active agent can refine the grain size of DCEN A-TIG joint. The mechanical properties of the weld were optimal at 10% AlF₃–75% LiF active agent. Compared with AC TIG and AC A-TIG welding, DCEN A-TIG welding yielded better results for 2219 Al alloy.

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