J4 ›› 2012, Vol. 25 ›› Issue (3): 92-94.doi: 10.3976/j.issn.1002-4026.2012.03.019

• Content • Previous Articles     Next Articles

Microstructure and mechanical properties of welded joint of AZ31 magnesium alloy by DC-TIG welding

 ZHANG Xin-En1, ZHOU Ji-Xue1, ZHAN Cheng-Wei1, ZHAO Dong-Qing1,2, LI Wei-Hong1, TANG Shou-Qiu1, YANG Yuan-Sheng1,2   

  1. 1.Institute of New Materials, Shandong Academy of Sciences, Jinan 250014, China;
    2.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2012-05-02 Published:2012-06-20 Online:2012-06-20

PDF (PC)

Like

Cited

30

Abstract:

      Argon tungstenarc welding (TIG) is the most popular welding method for magnesium alloys. AZ31 extruded plates with thickness of 6.0 mm were welded by DC-TIG welding. Microstructure and mechanical properties of welded joint of AZ31 magnesium alloy were studied by optical microscopy, scanning electron microscopy and tensile test machine. The microstructure analysis shows that the welded joint is composed of base material, heat affected zone and weld zone. A transition zone appears near the groove between the heat affected zone and the weld zone, which is the mix-fusion zone. The average tensile strength and the elongation of the welding joint is 241.0 MPa and 13.8% respectively, which arrives to 86.0% and 13.8% respectively of the base material. The fracture of welding joints is located in heat affected zone and the fracture surface presents mix fracture characteristics.

Key words: magnesium alloys;argon tungstenarc welding;microstructure;mechanical properties

CLC Number: 

  • TG292

Open Access This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0), which permits third parties to freely share (i.e., copy and redistribute the material in any medium or format) and adapt (i.e., remix, transform, or build upon the material) the articles published in this journal, provided that appropriate credit is given, a link to the license is provided, and any changes made are indicated. The material may not be used for commercial purposes. For details of the CC BY-NC 4.0 license, please visit: https://creativecommons.org/licenses/by-nc/4.0

鲁ICP备10205608号
Website Copyright © Editorial Office of Shandong Science
Tel: 0531-82605310　E-mail: xuxy@qlu.edu.cn
Powered by Beijing Magtech Co. Ltd