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<p>In order to expand the application of dissimilar aluminum alloy in the engineering field, the AA2A12 and AA7075 FSW temperature simulation was established by the J-C model and the effects of heat input on microstructure evolution and mechanical properties of these FSW joints were investigated. The results showed that the simulation temperature and experimental temperature could fit well. As tool rotational speed increased, the welding peak temperature gradually increased from 447 to 583&#xa0;°C. After FSW, the grain size of the NZ increased with the increase of tool rotational speed. The NZ grain size of 1000-80 joint was 2.44&#xa0;µm, and the main texture type was Goss texture with the highest texture strength of 6.09. The maximum tensile strength of the joint was 414&#xa0;MPa, which could reach 87% of AA2A12 BM.</p>

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Influence of Heat Input on Microstructure and Mechanical Properties of AA2A12 and AA7075 FSW Joints with their Temperature Field Model

  • 期刊论文

  • 发表日期：

    2026年2月5日

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  • Yongqi Wang,
  • Rui Huang,
  • Yijia Sheng,
  • Ruifeng Wang,
  • Jiangnan Xia,
  • Zhengwei Tang,
  • Hongwei Niu,
  • Dongshuai Zhou,
  • Jian Wang,
  • Zhihao Bai

摘要

In order to expand the application of dissimilar aluminum alloy in the engineering field, the AA2A12 and AA7075 FSW temperature simulation was established by the J-C model and the effects of heat input on microstructure evolution and mechanical properties of these FSW joints were investigated. The results showed that the simulation temperature and experimental temperature could fit well. As tool rotational speed increased, the welding peak temperature gradually increased from 447 to 583 °C. After FSW, the grain size of the NZ increased with the increase of tool rotational speed. The NZ grain size of 1000-80 joint was 2.44 µm, and the main texture type was Goss texture with the highest texture strength of 6.09. The maximum tensile strength of the joint was 414 MPa, which could reach 87% of AA2A12 BM.