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<p>The effects of Ti<sub>32.8</sub>Zr<sub>30.2</sub>Cu<sub>9</sub>Ni<sub>5.3</sub>Be<sub>22.7</sub> amorphous interlayer on the microstructure and properties of TA1 Ti-alloy/2A12 Al-alloy joints by electron beam welding (EBW) were investigated. The electron beam was focused at the middle of the butt joint and 1&#xa0;mm offset toward TA1 and 2A12, respectively. The results show that the Ti–Al intermetallic compound (IMC) layers are detected at the upper part of all three welded joints. However, when the electron beam is offset toward TA1, the area of the IMCs layer is the smallest, and the jagged TiAl<sub>3</sub> reaction layer with a thickness of 2–3&#xa0;μm is formed at the lower part of the welded joint. At the same time, the size of Ti–Al and Al-Zr IMCs on the 2A12 side decreases, and the amount of Al<sub>2</sub>Cu precipitation in the grain boundary significantly reduces and changes from continuous to non-continuous distribution, which also plays a certain role in improving the performance of the welded joint. Under this condition, the welded joint exhibits a maximum tensile strength of 257.3&#xa0;MPa.</p>

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Effect of TiZr-Based Amorphous Interlayer on TA1 Ti-Alloy/2A12 Al-Alloy Joints by Electron Beam Welding

  • 期刊论文

  • 发表日期：

    2026年2月18日

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  • Bo Zhang,
  • Lei Chen,
  • Rongzheng Xu,
  • Li Zhang

摘要

The effects of Ti32.8Zr30.2Cu9Ni5.3Be22.7 amorphous interlayer on the microstructure and properties of TA1 Ti-alloy/2A12 Al-alloy joints by electron beam welding (EBW) were investigated. The electron beam was focused at the middle of the butt joint and 1 mm offset toward TA1 and 2A12, respectively. The results show that the Ti–Al intermetallic compound (IMC) layers are detected at the upper part of all three welded joints. However, when the electron beam is offset toward TA1, the area of the IMCs layer is the smallest, and the jagged TiAl3 reaction layer with a thickness of 2–3 μm is formed at the lower part of the welded joint. At the same time, the size of Ti–Al and Al-Zr IMCs on the 2A12 side decreases, and the amount of Al2Cu precipitation in the grain boundary significantly reduces and changes from continuous to non-continuous distribution, which also plays a certain role in improving the performance of the welded joint. Under this condition, the welded joint exhibits a maximum tensile strength of 257.3 MPa.