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<p>The results of a&#xa0;study of the structure organization of bimetallic gradient zone formed from a&#xa0;Ti-6Al-4V titanium alloy and a&#xa0;AA5056 aluminum alloy are presented. It is shown that in the cases where the sample is shaped as a&#xa0;flat vertical wall with a&#xa0;smooth change in the content of components, there are no continuous intermetallic layers formed in the gradient zone, and the sample does not fail during printing. In the gradient structure zone, the formation of intermetallic phases and the increase in microhardness are noted. Microcracks are formed in the lower part of the gradient zone. The TiAl, Ti<sub>3</sub>Al and Al<sub>3</sub>Ti intermetallides are formed in different parts of the gradient layer. The tensile tests demonstrate a&#xa0;prevailing formation of the TiAl intermetallides.</p>

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Structure formation in titanium alloy—aluminum alloy gradient zone of samples fabricated by wire-feed electron-beam additive manufacturing

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • A. V. Chumaevskii,
  • A. M. Cheremnov,
  • V. M. Semenchuk,
  • D. A. Gurianov,
  • E. S. Metzler,
  • E. A. Kolubaev

摘要

The results of a study of the structure organization of bimetallic gradient zone formed from a Ti-6Al-4V titanium alloy and a AA5056 aluminum alloy are presented. It is shown that in the cases where the sample is shaped as a flat vertical wall with a smooth change in the content of components, there are no continuous intermetallic layers formed in the gradient zone, and the sample does not fail during printing. In the gradient structure zone, the formation of intermetallic phases and the increase in microhardness are noted. Microcracks are formed in the lower part of the gradient zone. The TiAl, Ti3Al and Al3Ti intermetallides are formed in different parts of the gradient layer. The tensile tests demonstrate a prevailing formation of the TiAl intermetallides.