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Microstructure homogenization of 2A14 aluminum alloy weld seam by ultrasonic irradiation in metal inert gas welding

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Abstract

The quality of welded joints is affected by microstructure heterogeneity of the weld seam. In this work, the microstructure homogenization of 2A14 aluminum alloy weld seam was achieved by adding ultrasonic irradiation in the metal-inert gas welding (U-MIG). Compared with the traditional MIG, the width and penetration of the weld seam in the U-MIG increased by 1 mm and 1.7 mm, respectively. Ultrasonic cavitation was the main reason for the microstructure homogenization of the weld seam. The columnar grains near the fusion line in the conventional MIG were completely transformed into the equiaxed grains under the action of ultrasonic irradiation. The size of equiaxed grains was more refined than that of the initial columnar grains.

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Funding

The National Science Foundation of China under Grant No. 51675130 financially supported this study. This work was also supported by the Key Program of the National Natural Science Foundation of China (Grant No. 51435004).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China

    Chenglei Fan, Chao Chen, Sanbao Lin, Zeng Liu & Xiaoyu Cai

  2. Beijing Aerospace Fresh Air Machinery and Equipment Co., Ltd, Beijing, 100074, China

    Yuchen Yang

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  1. Chenglei Fan
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  2. Chao Chen
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  3. Sanbao Lin
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  4. Zeng Liu
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  5. Xiaoyu Cai
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  6. Yuchen Yang
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Correspondence to Chenglei Fan.

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Fan, C., Chen, C., Lin, S. et al. Microstructure homogenization of 2A14 aluminum alloy weld seam by ultrasonic irradiation in metal inert gas welding. Int J Adv Manuf Technol 108, 1085–1089 (2020). https://doi.org/10.1007/s00170-019-04784-x

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  • DOI: https://doi.org/10.1007/s00170-019-04784-x

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