Finite Element Modeling of Hot Compression Testing of Titanium Alloys

Abstract This paper presents experimental results and finite element analysis of hot upsetting titanium alloys Ti64 Ti407 using a dilatometer in loading mode. All samples showed barrelling, as consequence an inhomogeneous temperature distribution friction. The FE is full thermomechanical model the test calibrated multiple thermocouples. At each nominal strain rate, true flow stress–strain response inferred difference between initially assumed constitutive input to analysis, $$\sigma =f\left(T,\dot{\varepsilon },\varepsilon \right)$$ ? = f T , ? ? , predicted model. applies new procedures for: (1) modeling thermal gradient; (2) finding stress correction due inhomogeneity, literature data analysis; (3) smoothing data, fitting empirical }\right)$$ surfaces at discrete strains. extracted confirm moderate strain-softening behavior alloy, predicts local deformation conditions, for application interpretation microstructure texture evolution. highlights actual showing that discrepancy varies systematically with central rate being magnified significantly, by factors order 2–3.