Constitutive modelling, dynamic globularization behavior and processing map for Ti-6Cr-5Mo-5V-4Al alloy during hot deformation

Superplastic deformation behavior of ultra-fine-grained Ti-1V-4Al-3Mo alloy: constitutive modeling and processing map

“…°C. This η-value is close to the typical efficiency value associated with dynamic recrystallization [20,25,43]. At this deformation regime, the β phase fraction was 52±4%, and the microstructure was equiaxed and homogeneous due to successful continuous dynamic recrystallization at the initial stage of superplastic deformation [25,43].…”

“…The efficiency value related to dynamic grain growth was below 0.2. Current results showed lower efficiency for the dynamic grain growth in the studied deformation regimes as compared to the typical values attained for hot deformation processes; η=0.3-0.4 [20,50].…”

“…Prasad et al [18] proposed processing maps, which are widely utilized for adjusting processing factors and governing microstructure during thermomechanical treatment. Based on dynamic materials model (DMM), in which the workpiece works as a dissipater of power, the processing maps can be constructed [19][20][21][22][23].…”

Hot Deformation Behaviors and Intrinsic Hot Workability Map of Ti-12Mo-4Zr-5Sn Alloy Based on Physical Model and Polar Reciprocity Model

“…Among the equation: ε − ln σ, β and n 1 under different conditions can be obtained, and the slope of each line can be obtained. Then, the corresponding α can be obtained according to Equation (8). Therefore, the average value of α is 0.005695.…”

“…It can express the influence of deformation conditions (temperature, strain rate, and strain) on the rheological behavior, and is the basis of the finite element numerical simulation technology and the formulation and optimization of thermal deformation process parameters. In recent years, there have been many reports on the application of the constitutive model to exploring the thermal deformation behavior of titanium alloy [7,8], but most of the constitutive models are based on Arrhenius constitutive equation, which belongs to the macroscopic phenomenological constitutive model. Those cannot effectively reveal the physical properties of materials.…”