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Al–Mg–Si alloys are used as structural materials in automotiveAutomotive vehicles due to their high strength, good corrosion resistanceCorrosion resistance, and good weldability. Built upon the previous success of combinatorial alloy developmentAlloy development of Al–Mn–Fe–Si alloys using laser-directed energy deposition (DED), the feasibility of using the same high-throughput approach to develop Al–Mg–Si alloys has been demonstrated. Al–Mg–Si alloys are known for their susceptibility to thermal cracking during solidificationSolidification in DED. Due to the heat-treatable nature of the alloy, microstructural components are also sensitive to thermal history. By optimizing laser deposition process parameters and feedstock materials, crack-free samples, with microstructuresMicrostructure similar to wrought products, can be successfully printed without the use of grain refinersGrain refiner for a wide range of alloy compositions. PrecipitationPrecipitation is studied as a function of alloy composition and compared to wrought counterparts.

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Al–Mg–Si Alloy Development Using Combinatorial Laser Directed Energy Deposition

  • 会议论文

  • 发表日期：

    2025年

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  • Aleena Maseang,
  • Qingyu Pan,
  • Monica Kapoor,
  • John Carsley,
  • Xiaoyuan Lou

摘要

Al–Mg–Si alloys are used as structural materials in automotiveAutomotive vehicles due to their high strength, good corrosion resistanceCorrosion resistance, and good weldability. Built upon the previous success of combinatorial alloy developmentAlloy development of Al–Mn–Fe–Si alloys using laser-directed energy deposition (DED), the feasibility of using the same high-throughput approach to develop Al–Mg–Si alloys has been demonstrated. Al–Mg–Si alloys are known for their susceptibility to thermal cracking during solidificationSolidification in DED. Due to the heat-treatable nature of the alloy, microstructural components are also sensitive to thermal history. By optimizing laser deposition process parameters and feedstock materials, crack-free samples, with microstructuresMicrostructure similar to wrought products, can be successfully printed without the use of grain refinersGrain refiner for a wide range of alloy compositions. PrecipitationPrecipitation is studied as a function of alloy composition and compared to wrought counterparts.