The effect of structural integrity on the tensile deformation characteristics of A206-T71 alloy castings

The effect of structural integrity on the tensile deformation of A206-T71 castings was evaluated. To generate a wide range of structural integrity, some castings were subjected to hot isostatic pressing (HIP) at various conditions and the others received no remedial processing. The analysis of true stress–strain curves of all castings showed that A206-T71 follows the Kocks–Mecking Stage III work hardening model in both non-HIPed and HIPed conditions. Nevertheless distinct differences were found within and between the HIPed and non-HIPed conditions. Kocks–Mecking parameters were correlated to elongation and toughness (strain energy). Structural integrity or quality, as measured by relative toughness, was found to have two types of effects on the Kocks–Mecking parameters. These effects are discussed in the paper.