Akademik Veri Yönetim Sistemi
Materials Science and Engineering: A, cilt.953, 2026 (SCI-Expanded, Scopus)
The use of aluminum alloys in transport, aerospace, and structural applications continues to grow due to their exceptional strength to weight ratio, corrosion resistance, and formability. Nonetheless, as a result of their post-fire performance, aluminum alloys pose a higher risk to structural safety. Consequently, to assess these risks, a combined experimental and analytical study was carried out. The experimental program consisted of tensile tests on 31 coupons. These coupons were then subjected to fire-simulated temperatures of up to 550 °C with subsequent cooling to room temperature via water, natural air, and foam cooling. In the analytical phase, the response of AA6061-T651 to other properties such as yield strength, ultimate tensile strength, hardness, and elastic modulus based on temperature was integrated into a new set of empirical expressions. These models were compared with the experimental data which are available in the literature. The proposed models allow a generalized framework to be created in evaluating the post-fire performance of the 6xxx series aluminum alloys, which can be used for structural safety assessments and fire-resistant designs. Microstructural investigations confirmed that no new phase transformations occurred after fire exposure, while SEM and EDS analyses revealed grain coarsening, precipitate coarsening/dissolution, and recrystallization at temperatures above 300 °C.