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<p>Dual wire and electron-beam additive manufacturing (WEBAM) was applied to produce multicomponent alloys containing 10, 25, and 50 vol.% of ER321 stainless steel in aluminum bronze CuAl9Mn2 and examine their as-built as well as annealed at 400 and 675&#xa0;°C for 1&#xa0;h microstructures. The microstructure of the as-built samples was composed of α-Cu(Al, Ni), α-Fe(Cr) and γ-Fe (Ni) solid solutions reinforced by β′-Cu<sub>3</sub>Al, NiAl and κ<sub>iv</sub>-phase (Fe<sub>3</sub>Al) precipitates, respectively. Annealing at 400 and 675&#xa0;°C resulted in enhanced microhardness of the as-built samples but affected their tensile strength and plasticity due to the effect of over-aging. The minimal wear rates were obtained on samples containing 10 vol.% of stainless steel. Wear rate increased with increasing the content of stainless steel in the bronze because of changing wear mechanism from adhesive plastic flow to abrading (plowing) by transferred stainless steel build-ups.</p>

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Microstructural Evolution and Mechanical and Tribological Characteristics of Additively Manufactured and Annealed Multicomponent Aluminum Bronze-Stainless Steel Alloys

  • 期刊论文

  • 发表日期：

    2025年11月18日

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  • A. Zykova,
  • A. Panfilov,
  • A. Nikolaeva,
  • D. Gurianov,
  • N. Savchenko,
  • S. Tarasov,
  • E. Kolubaev

摘要

Dual wire and electron-beam additive manufacturing (WEBAM) was applied to produce multicomponent alloys containing 10, 25, and 50 vol.% of ER321 stainless steel in aluminum bronze CuAl9Mn2 and examine their as-built as well as annealed at 400 and 675 °C for 1 h microstructures. The microstructure of the as-built samples was composed of α-Cu(Al, Ni), α-Fe(Cr) and γ-Fe (Ni) solid solutions reinforced by β′-Cu3Al, NiAl and κiv-phase (Fe3Al) precipitates, respectively. Annealing at 400 and 675 °C resulted in enhanced microhardness of the as-built samples but affected their tensile strength and plasticity due to the effect of over-aging. The minimal wear rates were obtained on samples containing 10 vol.% of stainless steel. Wear rate increased with increasing the content of stainless steel in the bronze because of changing wear mechanism from adhesive plastic flow to abrading (plowing) by transferred stainless steel build-ups.