PT Journal
AU Chlupova, A
   Poloprudsky, J
   Jambor, M
   Bruza, J
   Poczklan, L
   Man, J
TI Heat Treatment-Induced Microstructural Changes in Selectively Laser Melted AlSi10Mg Alloy
SO Manufacturing Technology Journal
PY 2025
BP 742
EP 750
VL 25
IS 6
DI 10.21062/mft.2025.077
DE Selective Laser Melting; Heat Treatment; AlSi10Mg; Microstructure; Properties
AB The study examines the effect of various post-processing heat treatments on the microstructural evolution and hardness of the AlSi10Mg alloy produced by selective laser melting (SLM). The alloy was examined in the as-built (AB) condition and after three heat treatment regimes: direct aging (DA, 160°C/5 h), stress relieving (SR, 300°C/2 h), and solution annealing followed by artificial aging (SA, 520°C/2 h + 170°C/4 h) to better understand the solidification and consolidation processes. A multiscale characterization using OM, SEM, EBSD, TEM, and EDS was performed to reveal the changes in specific microstructures due to additive manufacturing and different levels of heat treatment. The AB state exhibited a fine cellular network of Si within an α-Al matrix, and high hardness (approx. 138 HV1). The DA treatment preserved cellular morphology with mild coarsening, whereas SR led to partial fragmentation of the Si network and a significant drop in hardness (approx. 83 HV1). The SA condition caused recrystallization, Si spheroidization, and formation of Mg- and Fe-rich precipitates, accompanied by moderate hardness recovery (approx. 104 HV1). The persistent crystallographic texture was confirmed across all states.
ER