基于晶体塑性模型预测TA32钛合金损伤及高温成形极限

范荣磊, 陈明和, 吴迪鹏, 武永

Prediction of Damage and Hot Forming Limit of TA32 Titanium Alloy Based on Crystal Plasticity Model

FAN Ronglei, CHEN Minghe, WU Dipeng, WU Yong

表2 750 ℃下TA32钛合金CPFE模型中的材料参数

Table 2 Material parameters in CPFE model of TA32 titanium alloy at 750 oC

Item Parameter Value Unit Elastic constant of α phase C11, C12, C13, C33, C44 78, 42, 32, 90, 27 GPa Elastic constant of β phase C11, C12, C44 110, 92, 45 GPa Shear modulus μ 24 (α), 17 (β) GPa Reference shear rate γ˙0 0.1, 0.01, 0.001 s-1 Dislocation activation energy QS 413 (α), 600 (β) kJ·mol-1 Boltzmann constant kB 1.38 × 10-23 J·K-1 Material index p, q 0.5, 1.5 - Critical resolved shear stress τcr-prism, τcr-{110}[111] 140 (α), 112 (β) - Hardening coefficient ω1, ω2 1.5, 1.3 - Statistical coefficient λ 0.12 - Burgers vector b 0.295 (α), 0.286 (β) nm Dislocation multiplication constant k3 1278 - Dislocation annihilation constant k4 -14754 - Damage related material constant d1 300 -