Study of residual stresses in Ti-7Al using theory and experiments

摘要: Abstract Finite element simulations are carried out to follow the evolution of residual stresses in Ti-7Al ( α -hcp) alloy, as developed under an applied stress gradient. A model built upon phenomenological mesoscopic field dislocation mechanics is employed simulate deformation behavior. Model predictions validated with results generated from high energy X-ray diffraction experiments using synchrotron radiation. These provide for important simulation input, viz. grain positions and orientations, strain rate sensitivities prismatic basal slip systems Ti-7Al. data obtained individual grains enabled calculation values estimated  ∼ 0.04  ∼ 0.02 respectively. Residual at length scale subgrains successfully predicted against experimental data. key achievement present work measurement gradients within grains. Conclusions this that deform mainly via slip, accurate characterization rate-sensitivity needed development grain-level stresses.