Abstract
The theoretical assessment of the Al-Cu-Si was carried out in this work based on recent experimental studies (Riani et al. in Intermetallics, 17:154-164, 2009; He et al. in CALPHAD, 33:200-210, 2009. http://dx.doi.org/10.1016/j.calphad.2008.07.015; Ponweiser N and Richter KW in J. of Alloys and Compd, 512:252-263, 2012; Hallstedt et al. in CALPHAD, 53:25-38, 2016; Zobac et al in J Mater Sci, 55:5322-15333, 2020). The reassessment of the Cu-Si system was also carried out in the scope of this work, as experimental data indicates reasonable solubility of Al in all intermetallic phases in the Cu-Si binary system, and the stoichiometric models used in previous assessments of the Cu-Si binary system are not fully suitable for the extension into the ternary system. Excellent agreement was reached for the reassessment of the Cu-Si system with previous works, and new original results were obtained during the assessment of the ternary system. The high solubility of Si in the β(bcc) phase at high temperatures was modelled to explain experimental inconsistencies in the Cu-rich corner between 600 and 800 °C, and this assumption was confirmed experimentally. All main features of the experimental Al-Cu-Si phase diagram were reproduced well by theoretical modelling.
Original language | English |
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Article number | 173107 |
Pages (from-to) | 1206-1243 |
Number of pages | 38 |
Journal | Journal of Phase Equilibria and Diffusion |
Volume | 45 |
Issue number | 6 |
DOIs | |
Publication status | Published - Dec 2024 |
Austrian Fields of Science 2012
- 104017 Physical chemistry
- 104011 Materials chemistry
- 103018 Materials physics
Keywords
- Al-Cu-Si phase diagram
- CALPHAD
- Critical reassessment
- Cu-Si
- γ_brass phase