Tensile Ductility of Several Commercial Aluminum Alloys at Elevated Temperatures

Citation:

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.

Abstract:

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.

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