FEM Modelling of Recrystallization Behaviour for Near-Alpha Ti Alloy IMI834
The recrystallization behaviour of near-alpha titanium alloy IMI834, which is primarily used for high temperature aerospace compressor disc applications, has been investigated at hot working temperatures. The latest results of a finite element model, developed using the commercial code DEFORM-3D with constitutive equations adapted from available literature, will be presented. Model development and validation involved the hot compression of specimens with an initial bimodal alpha+beta microstructure at temperatures of 1000°C-1100°C, strain rates of 0.01s 1-1s 1, and varied post-deformation annealing times. The characterization of microstructure through quantitative metallography revealed beta grain refinement achieved primarily through static/metadynamic recrystallization. The beta recrystallization kinetics were subsequently predicted through an Avrami-type relationship.
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
P. Vo et al., "FEM Modelling of Recrystallization Behaviour for Near-Alpha Ti Alloy IMI834", Advanced Materials Research, Vols. 89-91, pp. 592-597, 2010