Effect of Low-Temperature Annealing on Creep Properties of AlSi10Mg Alloy Produced by Additive Manufacturing: Experiments and Modeling

• Published in: Metals (Basel ) Vol. 11; no. 2; p. 179
• Main Authors: Paoletti, Chiara, Cerri, Emanuela, Ghio, Emanuele, Santecchia, Eleonora, Cabibbo, Marcello, Spigarelli, Stefano
• Format: Journal Article
• Language: English
• Published: MDPI AG 01-02-2021
• Subjects: additive manufacturing; aluminum alloys; annealing; creep; modeling
• ISSN: 2075-4701; 2075-4701
• DOI: 10.3390/met11020179

The effects of postprocessing annealing at 225 °C for 2 h on the creep properties of AlSi10Mg alloy were investigated through constant load experiments carried out at 150 °C, 175 °C and 225 °C. In the range of the experimental conditions here considered, the annealing treatment resulted in an increase in minimum creep rate for a given stress. The reduction in creep strength was higher at the lowest temperature, while the effect progressively vanished as temperature increased and/or applied stress decreased. The minimum creep rate dependence on applied stress was modeled using a physically-based model which took into account the ripening of Si particles at high temperature and which had been previously applied to the as-deposited alloy. The model was successfully validated, since it gave an excellent description of the experimental data.