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Earlier work has demonstrated that the formability of a low-carbon sheet steel can be improved by deforming at temperatures below room temperature. In this work the tensile properties of a 5182-0 aluminum alloy were determined at low temperatures, and a significant increase in work-hardening rate resulted. The forms of the constitutive equations which best fitted the deformation behaviors of low-carbon steel and 5182-0 aluminum were completely different and could be rationalized in terms of the operative microscopic deformation mode. It appears that it may be possible to infer the operative microscopic deformation mechanism from the form of the constitutive equation.
constitutive equations, 5182-0 aluminum, AK steel, recovery, saturation
Staff Research Engineer, General Motors Research Laboratory, Warren, Mich.