Akademik Veri Yönetim Sistemi
Journal of the Taiwan Institute of Chemical Engineers, cilt.174, 2025 (SCI-Expanded)
Background: AA2024 alloy is known for its high strength and wear resistance, but conventional manufacturing methods have limitations such as micro-porosity. This study aims to overcome these limitations by applying thixoforging and T6 heat treatment to AA2024 alloy produced via powder metallurgy. Methods: In this study, AA2024 alloy was fabricated by powder metallurgy, and the effect of thixoforging and post-thixoforging T6 heat treatment on the microstructural, mechanical, and tribological properties were analyzed using optical and SEM microscopy, density measurements, hardness and tensile strength tests, and ball-on-disk wear tests. Significant Findings: Thixoforging at 595 °C, 615 °C, and 635 °C significantly enhanced material characteristics by reducing porosity, refining the grain structure, and achieving a maximum relative density of 99.45 %. T6 heat treatment further strengthened the alloy by promoting the precipitation of Al₂Cu and Al₂CuMg phases. Results showed that hardness increased approximately up to 48 % after thixoforging, with an additional 22 % improvement following T6 treatment compared to untreated AA2024 alloy. Besides, yield strength rose by 52 %, while ultimate tensile strength improved by 58 %, driven by precipitation hardening. Tribological evaluations revealed an 85 % reduction in wear rate post-thixoforging, further decreasing after heat treatment due to enhanced oxide film formation. The dominant wear mechanism transitioned from adhesive wear and delamination to predominantly abrasive wear.