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Effect of neodymium on microstructure and mechanical properties of AZ91 magnesium alloy

Song Yu-lai1, Liu Yao-hui2, Zhu Xian-yong1, Wang Su-huan1, Yu Si-rong2   

  1. 1.College of Materials Science and Engineering, Jilin University, Changchun 130022, China; 2.Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun 130022, China
  • Received:2005-09-20 Revised:2005-12-02 Online:2006-05-01 Published:2006-05-01
  • Contact: Liu Yaohui

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Abstract: The microstructure and mechanical properties of as cast AZ91Nd(neodymium) magnesium alloys were studied by microstructure analysis, mechanical property testing and analysis of fracture surface, where w(Nd) is 0, 0.1%, 0.3%, 0.5%, 1.0%, 1.5%. The results reveal that the element Nd added into AZ91 exists in the forms of both solid solution and intermetallics Al11Nd3. It has great effects on refining grains of αMg and βMg17Al12 , depressing the precipitation of secondary βMg17Al12 and transforming the partially divorced eutectic into the fully divorced. Nd effectively improves the tensile strength, ductility and hardness of AZ91 alloy due to the effects of solidsolution strengthening, precipitation strengthening as well as finegrained strengthening.

Key words: composite material, magnesium alloy, neodymium, microstructure, mechanical properties

CLC Number: 

  • TG146
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