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J Mater Sci Technol  2004, Vol. 20 Issue (04): 431-434    DOI:
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Energy-storage Welding Connection Characteristics of Rapid Solidification AZ91D Mg Alloy Ribbons
Jinfeng XU, Qiuya ZHAI, Sen YUAN
School of Materials Science and Engineering, Xi’an University of Technology, Xi0an 710048, China
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Abstract  Energy-storage welding connection characteristics of rapidly solidified AZ91D Mg alloy ribbons with 40~70 μm thickness are investigated using a microtype energy-storage welding machine. The microstructure and performance of the connection joints are analyzed and studied. The research results indicate that energy-storage welding is able to realize the spot welding connection of AZ9ID Mg alloy ribbons. The welding nugget consists of developed α-Mg equiaxed grains with the sizes of 1.2~2.7 μm and intergranular distributed β-Mg17Al12 compounds. The thickness of bond zone is about 4 μm and the solidification microstructure is characterized by the fine equiaxed grains with the sizes of 0.8~1.2 μm, and grain boundary has become coarsening. The columnar crystal in HAZ also becomes slightly coarsening and the grain boundary has broadened, however, there is no obvious change in its primitive morphology and crystallographic direction. When welding energy is about 2.0 J, the welding joints with higher shear strength and smaller electrical resistivity are obtained.
Key words:  AZ91D      Rapid solidification      Energy-storage welding      Microstructures      Properties      
Received:  01 January 1900     
Corresponding Authors:  Jinfeng XU     E-mail:  xu-zhai@xaut.edu.cn

Cite this article: 

Jinfeng XU, Qiuya ZHAI, Sen YUAN. Energy-storage Welding Connection Characteristics of Rapid Solidification AZ91D Mg Alloy Ribbons. J Mater Sci Technol, 2004, 20(04): 431-434.

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https://www.jmst.org/EN/     OR     https://www.jmst.org/EN/Y2004/V20/I04/431

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