Microstructure and Mechanical Properties of Frictional Stirring Welding Magnesium and Aluminum Dissimilar Alloys with Cu Foil

Wang Yanhui; Zhao Li; Deng Wei; Liu Liang; Zhou Xiaoping; Dong Shijie; Hu Xinbin

doi:10.15980/j.tzzz.2016.11.019

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Microstructure and Mechanical Properties of Frictional Stirring Welding Magnesium and Aluminum Dissimilar Alloys with Cu Foil
Vol. 36, Issue 11, Pages: 1187-1190(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.11.019

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[1]王彦辉,赵丽,邓威,刘亮,周小平,董仕节,胡心彬.添加Cu箔后搅拌摩擦焊镁/铝异种合金的组织与性能[J].特种铸造及有色合金,2016,36(11):1187-1190.

Wang Yanhui, Zhao Li, Deng Wei, et al. Microstructure and Mechanical Properties of Frictional Stirring Welding Magnesium and Aluminum Dissimilar Alloys with Cu Foil. [J]. Special Casting & Nonferrous Alloys 36(11):1187-1190(2016)
[1]王彦辉,赵丽,邓威,刘亮,周小平,董仕节,胡心彬.添加Cu箔后搅拌摩擦焊镁/铝异种合金的组织与性能[J].特种铸造及有色合金,2016,36(11):1187-1190. DOI： 10.15980/j.tzzz.2016.11.019.

Wang Yanhui, Zhao Li, Deng Wei, et al. Microstructure and Mechanical Properties of Frictional Stirring Welding Magnesium and Aluminum Dissimilar Alloys with Cu Foil. [J]. Special Casting & Nonferrous Alloys 36(11):1187-1190(2016) DOI： 10.15980/j.tzzz.2016.11.019.

摘要

采用搅拌摩擦焊对厚度为2mm的AZ31镁合金和5052铝合金异种合金进行了添加Cu箔的试验

利用金相显微镜、XRD、显微硬度计和微机控制万能试验机等研究了焊接接头的显微组织和性能。结果表明

接头处添加Cu箔后

在旋转速度为1 200r/min、进给速度为100mm/min时

得到良好的焊接接头

接头表面没有观察到宏观裂纹

抗拉强度达到86.2 MPa

焊接接头断裂于偏镁一侧;焊缝中心硬度较高

整个焊缝区硬度呈Λ型分布。焊缝处的XRD分析结果显示

焊缝处存在的金属间化合物有Al3Mg2、Al12Mg17、AlCu、Al2Cu、MgCu2。

Abstract

Effects of adding Cu foil on AZ31 magnesium with 2mm in thickness and 5052 aluminum dissimilar alloys welding were investigated by frictional stirring welding.With the help of optical microscopy

XRD

micro-hardness tester and computer control electronic universal testing machine

microstructure and performance of the welding joint were tested.The results reveal that

after adding Cu foil at the layup

with rotational speed of 1 200r/min and travel rate of 100mm/min

absence of macroscopic crack can be observed on the surface of jiont

and tensile strength of the joint can reach 86.2 MPa

and the crack welded joint is formed on the side of magnesium.Moreover

the welding center exhibits the the highest hardness.The XRD analysis reveals that there exists intermetallic compound of Al

、Al12Mg17、AlCu、Al

Cu、MgCu

in the welding line.