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This study investigates microstructural andmechanical property variations in a full-scale AA5083 direct-chill cast slabingot. Chemical segregation, grain size gradients, intermetallic compoundmorphology, and porosity distribution were characterized across top, middle,and bottom sections. Magnesium fluctuations, Fe-rich intermetallic size, andporosity density were found to strongly influence hardness, tensile strength,and elongation, particularly in the quarter-thickness region. Results show thatsolidification conditions and local cooling rates drive microstructuralheterogeneity, explaining measured property deviations of 10–15%. Findingssupport improved quality control and future specification development foras-cast AA5083 plates.

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The Effect of Direct Chill Casting on Microstructure and Mechanical Properties of AA5083 (EN AW 5083) Aluminum Alloy Slab Ingot

  • 会议论文

  • 发表日期：

    2026年

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  • Pascal Gauthier,
  • Alexandre Maltais,
  • José Ceballos Tejero,
  • Mehdi Shafiei

摘要

This study investigates microstructural andmechanical property variations in a full-scale AA5083 direct-chill cast slabingot. Chemical segregation, grain size gradients, intermetallic compoundmorphology, and porosity distribution were characterized across top, middle,and bottom sections. Magnesium fluctuations, Fe-rich intermetallic size, andporosity density were found to strongly influence hardness, tensile strength,and elongation, particularly in the quarter-thickness region. Results show thatsolidification conditions and local cooling rates drive microstructuralheterogeneity, explaining measured property deviations of 10–15%. Findingssupport improved quality control and future specification development foras-cast AA5083 plates.