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<p>This study employed explosive welding technology to fabricate a TC1/1060/6061 composite plate subjected to subsequent tensile and interfacial shear tests before and after heat treatment. The macroscopic mechanical properties and fracture behavior were examined through microscopic grain observation and mechanical properties testing. The findings indicated a significant reduction in the strength of 6061 by 60.7% following heat treatment, resulting in an overall decline in the titanium/aluminum composite plate’s strength by 29.9%, yet an significantly enhancement in ductility. The grain size of the vortex region at the 1060/6061 interface remained unchanged after heat treatment. However, the grain morphology of the aluminum side changed greatly. Most of the deformed structures developed into recrystallized structures and substructures, and the low-angle grain boundaries were transformed into high-angle grain boundaries. Consequently, the tensile fracture interface on the aluminum side separated. After heat treatment, the average hardness values of TC1, 1060, and 6061 decreased by 6.4%, 29.2%, and 59.6%, respectively. This micromechanical adjustment can be attributed as the cause of improvement of the ductility observed in each layer and the composite plate.</p>

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The Role of Heat Treatment on the Fracture Behavior of TC1 Titanium Alloy/Al 6061 Explosively Welds Using Al 1060 Interlayer

  • 期刊论文

  • 发表日期：

    2025年11月26日

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  • Haiwei Zhou,
  • Fei Shao,
  • Linyue Bai,
  • Qian Xu,
  • Jiaxin Yuan,
  • Hailong Liu

摘要

This study employed explosive welding technology to fabricate a TC1/1060/6061 composite plate subjected to subsequent tensile and interfacial shear tests before and after heat treatment. The macroscopic mechanical properties and fracture behavior were examined through microscopic grain observation and mechanical properties testing. The findings indicated a significant reduction in the strength of 6061 by 60.7% following heat treatment, resulting in an overall decline in the titanium/aluminum composite plate’s strength by 29.9%, yet an significantly enhancement in ductility. The grain size of the vortex region at the 1060/6061 interface remained unchanged after heat treatment. However, the grain morphology of the aluminum side changed greatly. Most of the deformed structures developed into recrystallized structures and substructures, and the low-angle grain boundaries were transformed into high-angle grain boundaries. Consequently, the tensile fracture interface on the aluminum side separated. After heat treatment, the average hardness values of TC1, 1060, and 6061 decreased by 6.4%, 29.2%, and 59.6%, respectively. This micromechanical adjustment can be attributed as the cause of improvement of the ductility observed in each layer and the composite plate.