Deformation, residual stress, and constitutive relations for quenched W319 aluminum

A study of the development of deformation and transient and residual stresses during quenching in aluminum alloy W319 is presented. Rapid tension tests were performed on W319 in the supersaturated solution state at several temperatures and strain rates. A material model following the mechanical threshold stress (MTS)-Voce formulation is developed and implemented in both a simple one-dimensional code and a fully three-dimensional form as a user material subroutine in ABAQUS. The results of the tension tests are used to determine the parameters in the thermo-mechanical constitutive model. Unidirectional beam quenching experiments are performed to test the applicability of the constitutive model. Residual stresses in the beams are measured using a groove removal technique upon completion of the quenching process. Residual stress and deformation results from beam quenching experiments compare well to the analytical results computed using the constitutive model.