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Aluminium alloysAluminium alloys are widely used in the aerospaceAerospace and automotiveAutomotive industryIndustry due to their excellent strength-to-weight ratio and corrosion resistanceCorrosion resistance. There has been a demand for cost-effective alloys in applications at elevated temperatures. We proposed two new Al alloysAl alloy based the on Al–Fe–Mn–Ni–Ce system that have low cracking susceptibility and are capable of maintaining their microstructureMicrostructure and strength at high temperatures \((T>\sim 0.5{T}_{m}\) , where \({T}_{m}\) is the absolute melting temperature of Al) for a given time. To design alloys with a low cracking susceptibility, compositions with a small freezing range during solidificationSolidification were selected. Then the solidificationSolidification shrinkage was experimentally measured in order to further screen the compositions with lower shrinkage. Casts in wedge mould were used to characterise the microstructural morphologies of the designed alloys with various cooling ratesCooling rate. The methodology proposed here can be used for alloy designsAlloy design for both cast and additive manufacturingAdditive manufacturing.

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A New Approach to the Design of Al Alloys with Low Cracking Susceptibility and High-Temperature Strength for Cast and Additive Manufacturing

  • 会议论文

  • 发表日期：

    2025年

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  • Chengbo Zhu,
  • Da Guo,
  • Kai Zhang,
  • Iakovos Tzanakis,
  • Chu Lun Alex Leung,
  • Peter D. Lee,
  • Dmitry Eskin

摘要

Aluminium alloysAluminium alloys are widely used in the aerospaceAerospace and automotiveAutomotive industryIndustry due to their excellent strength-to-weight ratio and corrosion resistanceCorrosion resistance. There has been a demand for cost-effective alloys in applications at elevated temperatures. We proposed two new Al alloysAl alloy based the on Al–Fe–Mn–Ni–Ce system that have low cracking susceptibility and are capable of maintaining their microstructureMicrostructure and strength at high temperatures \((T>\sim 0.5{T}_{m}\) , where \({T}_{m}\) is the absolute melting temperature of Al) for a given time. To design alloys with a low cracking susceptibility, compositions with a small freezing range during solidificationSolidification were selected. Then the solidificationSolidification shrinkage was experimentally measured in order to further screen the compositions with lower shrinkage. Casts in wedge mould were used to characterise the microstructural morphologies of the designed alloys with various cooling ratesCooling rate. The methodology proposed here can be used for alloy designsAlloy design for both cast and additive manufacturingAdditive manufacturing.