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To analyze the impact of L-PBF process parameters and T7 heat treatment on the microstructure and mechanical properties of Al-Cu 224 alloy.

Microstructural Evolution and Mechanical Behavior of L-PBF Al-Cu 224 Alloy: Role of Process Parameters and Heat Treatment

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To analyze the impact of L-PBF process parameters and T7 heat treatment on the microstructure and mechanical properties of Al-Cu 224 alloy.
Varied laser power (200–370 W), scanning speed (130–1900 mm/s), and hatch spacing (90–130 μm) during L-PBF.
Conducted microstructural characterization using optical microscopy, scanning electron microscopy, and electron backscatter diffraction.
Evaluated mechanical properties post-T7 heat treatment.
Achieved yield strength of 152 MPa in as-built samples, increased to 233 MPa post-T7 treatment.
Keyhole porosity limited relative density to 95%, with energy density affecting defect formation.
Identified trade-offs between hot cracking and porosity influencing mechanical performance.

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Investigates L-PBF parameters and T7 heat treatment effects on Al-Cu 224 alloy properties, highlighting optimization implications.

Pourkhorshid et al. (2026) studied this question.

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