Welding in the World

, Volume 62, Issue 2, pp 427–433 | Cite as

Influence of alloy elements on microstructure and mechanical properties of Al/steel dissimilar joint by laser welding/brazing

  • Jin Yang
  • Zhishui Yu
  • Yulong Li
  • Hua Zhang
  • Wei Guo
  • Norman Zhou
Research Paper


The problem in dissimilar material joining (e.g., Al/steel) is the degradation of joint mechanical properties by formation of the hard and brittle interfacial intermetallic compounds. In the present study, in order to improve the joint mechanical properties, alloy elements Si and Zn are added in the form of Al-Si and Zn-Al filler metals, respectively. The effects of alloy elements on the joints are investigated in terms of interfacial microstructure and mechanical properties. The results have shown that element Si is able to suppress the growth of interfacial reaction layer, which leads to the improvement in the fracture load, while element Zn is capable of reducing the brittleness of reaction layer, and it consequently enhances the fracture load.


Al/steel dissimilar joint Microstructure Mechanical properties Laser welding/brazing 


Funding information

Financial support of National Natural Science Foundation of China (no. 51665038) and State Scholarship Fund of China (no. 201306820002) are gratefully acknowledged.


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Copyright information

© International Institute of Welding 2017

Authors and Affiliations

  1. 1.Department of Materials EngineeringShanghai University of Engineering ScienceShanghaiChina
  2. 2.Key Laboratory of Robot and Welding Automation of Jiangxi ProvinceNanchang UniversityNanchangChina
  3. 3.School of Mechanical Engineering and AutomationBeihang UniversityBeijingChina
  4. 4.Center for Advanced Materials JoiningUniversity of WaterlooWaterlooCanada

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