Finite element analysis of small-scale hot compression testing

This paper models hot compression testing using a dilatometer in loading mode. These small-scale tests provide high throughput at low cost, but are susceptible to inhomogeneity due friction and temperature gradients. A novel method is presented for correcting the true stress-strain constitutive response over full range of temperatures, strain-rates strain. The nominal from used predict offset curves inhomogeneity, this stress ?? applied piecewise data, one iteration. key new feature smoothing fitting flow data as function strain-rate, multiple discrete strains. corrected model then provides quantitative prediction spatial temporal variation strain-rate strain throughout sample, needed correlate local deformation conditions with microstructure texture evolution. study uses detailed series 144 Zr-Nb alloy. While an important wrought nuclear alloy its own right, it also serves here test case modelling alloys, particularly those dual ?-? phase microstructures (such titanium alloys).