Effect of intermetallic compounds on the fracture behavior of dissimilar friction stir welding joints of Mg and Al alloys
来源期刊：International Journal of Minerals Metallurgy and Materials2019年第10期
论文作者：Amir Hossein Baghdadi Zainuddin Sajuri Nor Fazilah Mohamad Selamat Mohd Zaidi Omar Yukio Miyashita Amir Hossein Kokabi
文章页码：1285 - 1298
摘 要：Joining Mg to Al is challenging because of the deterioration of mechanical properties caused by the formation of intermetallic compounds（IMCs） at the Mg/Al interface. This study aims to improve the mechanical properties of welded samples by preventing the fracture location at the Mg/Al interface. Friction stir welding was performed to join Mg to Al at different rotational and travel speeds. The microstructure of the welded samples showed the IMCs layers containing Al12Mg17（γ） and Al3Mg2（β） at the welding zone with a thickness（< 3.5 μm）. Mechanical properties were mainly affected by the thickness of the IMCs, which was governed by welding parameters. The highest tensile strength was obtained at 600 r/min and 40 mm/min with a welding efficiency of 80%. The specimens could fracture along the boundary at the thermo-mechanically affected zone in the Mg side of the welded joint.
Amir Hossein Baghdadi1，Zainuddin Sajuri1，Nor Fazilah Mohamad Selamat1，Mohd Zaidi Omar1，Yukio Miyashita2，Amir Hossein Kokabi3
1. Centre for Materials Engineering and Smart Manufacturing, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia2. Department of Mechanical Engineering, Nagaoka University of Technology3. Department of Materials Science and Engineering, Sharif University of Technology
摘 要：Joining Mg to Al is challenging because of the deterioration of mechanical properties caused by the formation of intermetallic compounds（IMCs） at the Mg/Al interface. This study aims to improve the mechanical properties of welded samples by preventing the fracture location at the Mg/Al interface. Friction stir welding was performed to join Mg to Al at different rotational and travel speeds. The microstructure of the welded samples showed the IMCs layers containing Al12Mg17（γ） and Al3Mg2（β） at the welding zone with a thickness（< 3.5 μm）. Mechanical properties were mainly affected by the thickness of the IMCs, which was governed by welding parameters. The highest tensile strength was obtained at 600 r/min and 40 mm/min with a welding efficiency of 80%. The specimens could fracture along the boundary at the thermo-mechanically affected zone in the Mg side of the welded joint.
关键词：
