Tensile Ductility of Several Commercial Aluminum Alloys at Elevated Temperatures


E. M. Taleff, Nevland, P. J., and Krajewski, P. E., “Tensile Ductility of Several Commercial Aluminum Alloys at Elevated Temperatures,” Metallurgical and Materials Transactions A, vol. 32A, pp. 1119–1130, 2001.


One experimental and five commercial aluminum alloys were tested in tension at elevated temperatures (225 °C to 500 °C) over a range of strain rates (2×10−5 to 10−1 s−1). The experimental alloy contained 5 wt pct Zn with a balance of Al. The commercial alloys included AA 5182, 5754, 7150, 6111, and 6022. Two 5182 materials were examined, one produced by standard ingot-processing methods and the other by continuous casting. The 5754 and 5182 alloys exhibited a deformation regime consistent with solute-drag creep for values of diffusivity-compensated strain rate less than 1013 m−2. Within this regime, the 5754 and ingot-metallurgy 5182 materials exhibited tensile ductilities up to 140 pct. The continuously cast 5182 material exhibited lower ductility in this regime than the 5754 and ingot-metallurgy 5182 materials, despite similar stress exponents. Ductility was reduced in the continuously cast 5182 because of significant dynamic grain growth and cavitation. The 7150, Al-5Zn, 6111, and 6022 materials exhibited significantly higher stress exponents and lower tensile ductilities thanthe 5000-series materials.