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2026 Solanki Mg2Si Rich Al Heat Treatment

Keyur Solanki, Paul Lobpreis

2026enadditive manufacturingaluminium alloyslaser powder bed fusionheat treatmentprecipitation hardeningmicrostructure

Abstract

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Laser Powder Bed Fusion (LPBF) research on aluminum alloys has predominantly focused on commercial Al–Si–Mg systems with modest Mg2Si contents, leaving the heat-treatment response of Mg2Si-rich compositions largely unexplored. This study investigates, for the first time, the hardness response of an LPBF-tailored aluminum alloy containing 3.94 ma% Mg2Si—over twice the equilibrium solid-state solubility limit—and identifies an optimized post-processing route to enhance mechanical performance. Three heat-treatment conditions were investigated: direct aging, solution annealing (SA), and combined solution annealing plus artificial aging (SA + A). Hardness mapping revealed that direct aging at 190 °C for 330 min achieved the highest hardness of 164 HBW2.5/67.5. The as-built and direct aged conditions were investigated using SEM, EBSD, and TEM to provide a comparative perspective of the microstructural changes that explain the increase in specimen hardness between the two conditions. The as-built state revealed a highly supersaturated α-Al matrix concentrated with early stage Al-.

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Cite This Work

@article{ee827e35-58ea-4993-8004-af985237dfac,
  title={2026 Solanki Mg2Si Rich Al Heat Treatment},
  author={Keyur Solanki and Paul Lobpreis},
  year={2026},
  language={en}
}
TY  - JOUR
TI  - 2026 Solanki Mg2Si Rich Al Heat Treatment
AU  - Keyur Solanki
AU  - Paul Lobpreis
PY  - 2026
LA  - en
ER  -

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