Microstructure and Properties of Friction Stir Lap Welded Dissimilar Magnesium Alloy

被引：1
|
作者：
Li, Tielong [1 ,3 ]
Wang, Zhenshan [2 ]
Qu, Erguang [3 ]
机构：
[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Adv Joining Technol, Tianjin 300072, Peoples R China
[2] Shanxi Wenxi Silver Magnesium Ind Co LTD, Yuncheng 043800, Shanxi, Peoples R China
[3] Yuncheng Univ, Mech & Elect Engn Dept, Yuncheng 044000, Shanxi, Peoples R China
来源：
JOURNAL OF COMPUTATIONAL AND THEORETICAL NANOSCIENCE | 2015年 / 12卷 / 09期
关键词：
Dissimilar Magnesium Alloy; Friction Stir Lap Welding; Defects; Metallographic Structure; Shear Performance; Curvature;
D O I：
10.1166/jctn.2015.4211
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The extruded AZ80 and roll-casting AZ31B magnesium alloy sheets which AZ80 is under AZ31B were friction stir lap welded with different process parameter. Microstructure observation, hardness measurement, shear test and fracture scanning were carried through for the welding joints. Influence of the friction stir rotating speed on holes, hooked defects, migration interface, micro-structure shaping and mechanical properties of the welding joints were discussed in this paper. Microstructure difference of the different zones of the joint was analyzed and compared. All the shear specimens of welding joints belong to brittle fracture. The shear load is relevant to the curvature of migration interface in advancing side, the greater the curvature, the greater the shear load bearing. The internal holes defects of the welding joint has less effect on shear performance than the curvature of migration interface.
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页码：2990 / 2996
页数：7
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