Mechanism of Grain Refinement in 3D-Printed AlSi10Mg Alloy Subjected to Severe Plastic Deformation
Abstract
:1. Introduction
2. Methodology
- Laser power = 175 W;
- Layer thickness = 20 µm;
- Scanning speed = 1400 mm/s;
- Scanning strategy—zigzag with 67° rotation;
- Build plate material—pure aluminum;
- Build plate temperature—room temperature.
3. Results
3.1. Microstructure Analysis
3.2. Grain Refinement Model
4. Conclusions
- The unique heterogeneous microstructure was preserved after heat treatment. Electron microscopy analysis revealed a multiscale heterogeneous microstructure composed of bimodal grains, melt pool structures, and Al/Si cells.
- Intensive accumulation of dislocations resulted in a refinement of the grain structure down to the sub-micrometer scale. After one ECAP pass, the average grain size of the grains attained ~500 nm.
- The Al/Si cell boundaries significantly contributed to grain refinement, mainly because of their tendency to hinder dislocation movement.
- High-resolution TKD results demonstrated that the Al/Si cellular wall lattice orientation increased after ECAP processing. The newly formed subgrain boundaries have misorientation between 2 and 8°, thus contributing to grain refinement.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Snopiński, P.; Hilšer, O. Mechanism of Grain Refinement in 3D-Printed AlSi10Mg Alloy Subjected to Severe Plastic Deformation. Materials 2024, 17, 4098. https://doi.org/10.3390/ma17164098
Snopiński P, Hilšer O. Mechanism of Grain Refinement in 3D-Printed AlSi10Mg Alloy Subjected to Severe Plastic Deformation. Materials. 2024; 17(16):4098. https://doi.org/10.3390/ma17164098
Chicago/Turabian StyleSnopiński, Przemysław, and Ondřej Hilšer. 2024. "Mechanism of Grain Refinement in 3D-Printed AlSi10Mg Alloy Subjected to Severe Plastic Deformation" Materials 17, no. 16: 4098. https://doi.org/10.3390/ma17164098