Effect of Tool Pin Profile on Friction Stir Welding of Dissimilar Materials AA5083and AA7075 Aluminium Alloy

Archives of Metallurgy and Materials

article

M.H. Azmi¹  M.Z. Hasnol¹  M.F.A. Zaharuddin¹  S. Sharif¹  S. Rhee² 

[1] Universiti Teknologi Malaysia, School of Mechanical Engineering, Faculty of Engineering;Hanyang University, Department of Mechanical Engineering

关键词: Friction stir welding;    aluminium alloys;    tool pin;    mechanical properties;   

DOI  :  10.24425/amm.2022.137778

学科分类：物理（综合）

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

Friction stir welding (FSW) currently contributes a significant joining process for welding aluminium, magnesium, and othermetals in which no molten or liquid state were involved. It is well known that aluminium alloys are more effective, promising fordifferent applications light weight, strength and low cost. This study aims to determine how such tools geometry and tool speedcan be related to dissimilar material in the joining process. Specifically, it investigates whether the distribution of the weld zoneparticularly between tool pin profile to rotational speed. In this context, the influence of tool pin profile and tool rotational speed inrelation to the mechanical properties and microstructure of friction stir welded. The aim of this study is also to test the hypothesisthat better mixing between dissimilar metals at higher tool rotational speed along the weld path. Three different tool profiles wereconfigured with AA5083 and AA7075. During welding, notable presence of various types of defects such as voids and wormholesin the weld region. The results of this work showed that the tool pin profile and weld parameter are significant in determiningmechanical properties at different tool rotational speed. The highest tensile strength achieved was about 263 MPa and the defectfree joint was obtained by using the threaded tapered cylindrical pin tool at a rotational speed of 800 rpm. These findings indicatethat different tool profiles influence differently on the formation of defects at welds. On this basis, the tool geometry should beconsidered when designing experimental friction stir welded joint.

【 授权许可】

CC BY-NC