Microstructures and mechanical properties of magnesium alloy and stainless steel weld-joint made by friction stir lap welding

Yanni Wei; Jinglong Li; Jiangtao Xiong; Fu Huang; Fusheng Zhang

doi:10.1016/j.matdes.2011.07.016

Microstructures and mechanical properties of magnesium alloy and stainless steel weld-joint made by friction stir lap welding

Yanni Wei, Jinglong Li, Jiangtao Xiong, Fu Huang, Fusheng Zhang

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

71 Scopus citations

Abstract

Friction stir lap welding was conducted on soft/hard metals. A welding tool was designed with a cutting pin of rotary burr made of tungsten carbide, which makes the stirring pin possible to penetrate and cut the surface layer of the hard metal. Magnesium alloy AZ31 and stainless steel SUS302 were chosen as soft/hard base metals. The structures of the joining interface were analyzed by scanning electron microscopy (SEM). The joining strength was evaluated by tensile shear test. The results showed that flower-like interfacial morphologies were presented with steel flashes and scraps, which formed bonding mechanisms of nail effect by long steel flashes, zipper effect by saw-tooth structure and metallurgical bonding. The shear strength of the lap joint falls around the shear strength of butt joint of friction stir welded magnesium alloy.

Original language	English
Pages (from-to)	111-114
Number of pages	4
Journal	Materials and Design
Volume	33
Issue number	1
DOIs	https://doi.org/10.1016/j.matdes.2011.07.016
State	Published - Jan 2012

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abstract = "Friction stir lap welding was conducted on soft/hard metals. A welding tool was designed with a cutting pin of rotary burr made of tungsten carbide, which makes the stirring pin possible to penetrate and cut the surface layer of the hard metal. Magnesium alloy AZ31 and stainless steel SUS302 were chosen as soft/hard base metals. The structures of the joining interface were analyzed by scanning electron microscopy (SEM). The joining strength was evaluated by tensile shear test. The results showed that flower-like interfacial morphologies were presented with steel flashes and scraps, which formed bonding mechanisms of nail effect by long steel flashes, zipper effect by saw-tooth structure and metallurgical bonding. The shear strength of the lap joint falls around the shear strength of butt joint of friction stir welded magnesium alloy.",

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AU - Wei, Yanni

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AU - Xiong, Jiangtao

AU - Huang, Fu

AU - Zhang, Fusheng

PY - 2012/1

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AB - Friction stir lap welding was conducted on soft/hard metals. A welding tool was designed with a cutting pin of rotary burr made of tungsten carbide, which makes the stirring pin possible to penetrate and cut the surface layer of the hard metal. Magnesium alloy AZ31 and stainless steel SUS302 were chosen as soft/hard base metals. The structures of the joining interface were analyzed by scanning electron microscopy (SEM). The joining strength was evaluated by tensile shear test. The results showed that flower-like interfacial morphologies were presented with steel flashes and scraps, which formed bonding mechanisms of nail effect by long steel flashes, zipper effect by saw-tooth structure and metallurgical bonding. The shear strength of the lap joint falls around the shear strength of butt joint of friction stir welded magnesium alloy.

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Microstructures and mechanical properties of magnesium alloy and stainless steel weld-joint made by friction stir lap welding

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