Characteristics of AZ31 Mg alloy joint using automatic TIG welding

Hong-tao Liu, Ji-xue Zhou, Dong-qing Zhao, Yun-teng Liu, Jian-hua Wu, Yuan-sheng Yang, Bai-chang Ma, Hai-hua Zhuang

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Hong-tao Liu, Ji-xue Zhou, Dong-qing Zhao, Yun-teng Liu, Jian-hua Wu, Yuan-sheng Yang, Bai-chang Ma, and Hai-hua Zhuang, Characteristics of AZ31 Mg alloy joint using automatic TIG welding, Int. J. Miner. Metall. Mater., 24(2017), No. 1, pp.102-108. https://dx.doi.org/10.1007/s12613-017-1383-8
Hong-tao Liu, Ji-xue Zhou, Dong-qing Zhao, Yun-teng Liu, Jian-hua Wu, Yuan-sheng Yang, Bai-chang Ma, and Hai-hua Zhuang, Characteristics of AZ31 Mg alloy joint using automatic TIG welding, Int. J. Miner. Metall. Mater., 24(2017), No. 1, pp.102-108. https://dx.doi.org/10.1007/s12613-017-1383-8
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研究论文

Characteristics of AZ31 Mg alloy joint using automatic TIG welding

  • Shandong Key Laboratory for High Strength Lightweight Metallic Materials, Advanced Materials Institute, Shandong Academy of Sciences, Jinan 250014, China

  • Shandong Engineering Research Center for Lightweight Automobiles Magnesium Alloys, Advanced Materials Institute, Shandong Academy of Sciences, Jinan 250014, China

  • Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

基金项目: 

This work is supported by the National Key Research and Development Plan of China (Grant Nos. 2016YFB0701200 and 2016YFB0301105), the Natural Science Foundation of Shandong Province, China (Grant Nos. ZR2015EQ019, BS2015CL016, and ZR2015YL007), and the Youth Foundation of Shandong Academy of Sciences, China (Grant No. 2016QN015).

    通信作者:

    Hong-tao Liu E-mail: hongtaoliu@sdas.org

中文摘要

The automatic tungsten-inert gas welding (ATIGW) of AZ31 Mg alloys was performed using a six-axis robot. The evolution of the microstructure and texture of the AZ31 auto-welded joints was studied by optical microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and electron backscatter diffraction. The ATIGW process resulted in coarse recrystallized grains in the heat affected zone (HAZ) and epitaxial growth of columnar grains in the fusion zone (FZ). Substantial changes of texture between the base material (BM) and the FZ were detected. The {0002} basal plane in the BM was largely parallel to the sheet rolling plane, whereas the c-axis of the crystal lattice in the FZ inclined approximately 25° with respect to the welding direction. The maximum pole density increased from 9.45 in the BM to 12.9 in the FZ. The microhardness distribution, tensile properties, and fracture features of the AZ31 auto-welded joints were also investigated.

 

Research Article

Characteristics of AZ31 Mg alloy joint using automatic TIG welding

Author Affilications

    • Shandong Key Laboratory for High Strength Lightweight Metallic Materials, Advanced Materials Institute, Shandong Academy of Sciences, Jinan 250014, China

    • Shandong Engineering Research Center for Lightweight Automobiles Magnesium Alloys, Advanced Materials Institute, Shandong Academy of Sciences, Jinan 250014, China

    • Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

  • Funds: 

    This work is supported by the National Key Research and Development Plan of China (Grant Nos. 2016YFB0701200 and 2016YFB0301105), the Natural Science Foundation of Shandong Province, China (Grant Nos. ZR2015EQ019, BS2015CL016, and ZR2015YL007), and the Youth Foundation of Shandong Academy of Sciences, China (Grant No. 2016QN015).

  • Received: 01 July 2016; Revised: 11 September 2016; Accepted: 17 September 2016;
The automatic tungsten-inert gas welding (ATIGW) of AZ31 Mg alloys was performed using a six-axis robot. The evolution of the microstructure and texture of the AZ31 auto-welded joints was studied by optical microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and electron backscatter diffraction. The ATIGW process resulted in coarse recrystallized grains in the heat affected zone (HAZ) and epitaxial growth of columnar grains in the fusion zone (FZ). Substantial changes of texture between the base material (BM) and the FZ were detected. The {0002} basal plane in the BM was largely parallel to the sheet rolling plane, whereas the c-axis of the crystal lattice in the FZ inclined approximately 25° with respect to the welding direction. The maximum pole density increased from 9.45 in the BM to 12.9 in the FZ. The microhardness distribution, tensile properties, and fracture features of the AZ31 auto-welded joints were also investigated.

 

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S. Srinivasan, R. Ravi Bharath, Andrej Atrens, et al. Fusion Welding of Magnesium Alloys: Process Variants, Metallurgical Challenges, and Structure–Property Relationships—A Critical Review. Journal of Materials Engineering and Performance, 2025. 必应学术
Gaurav Singh, Ashok Kumar Dewangan, Mohammad Faseeulla Khan, et al. Fundamental review on gas tungsten arc welding of magnesium alloys: challenges, innovations, and future perspectives. Welding in the World, 2025. 必应学术
Maroš Vyskoč, Mirjana Novaković, Jelena Potočnik, et al. Microstructure – Properties relationship in laser-welded AZ31B magnesium alloy. Materials Characterization, 2024, 208: 113664. 必应学术
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