Improving microstructure, tensile properties and corrosion resistance of AA6016 and AA2519 alloys friction stir lap joints via TIG arc

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2025-02-01 DOI:10.1016/S1003-6326(24)66688-4

Tie YI , Sheng-dan LIU , Chen FANG , Geng-duo JIANG , Xuan-xuan DAI

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引用次数: 0

Abstract

The effects of tungsten inert gas arc-assisted friction stir welding (TIG-FSW) on the microstructure, tensile properties and corrosion resistance of AA6016 and AA2519 alloys lap joints were investigated by means of optical microscope, scanning electron microscope, tensile test at room temperature, corrosion immersion tests and electrochemical measurements. The results show that the introduction of TIG arc during FSW process results in a more uniform microstructure of the joint with no tunnel hole defects. Furthermore, it enhances tensile strength and elongation of the joint with increased rates of 11.5% and 50.0%, respectively; meanwhile, the corrosion current density and largest corrosion depth are decreased with reduction rates of 78.2% and 45.7%, respectively. TIG-FSW can promote flow, contact and diffusion of materials, thus improving microstructure of the joint. Additionally, it reduces the size and number of secondary phase particles. Consequently, these factors contribute to the higher tensile properties and corrosion resistance of the joints.

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.