NiCrFe焊缝金属的晶界形貌和晶界MC碳化物对局部变形行为的影响

周辉,王培,陆善平

Effect of Grain Boundary Morphology and MC on Plastic Deformation Behavior of NiCrFe Weld Metal: Crystal Plasticity Finite Element Analysis

Hui ZHOU,Pei WANG,Shanping LU

表2 晶体塑性计算使用的NiCrFe焊缝金属和MC的材料参数

Table 2 Material parameters of NiCrFe weld metal and MC precipitate that used in crystalline plasticity finite element method

Parameter Symbol Matrix MC Unit Elastic moduli E 143000 650000 MPa Reference strain rate γ˙(α) 0.001 0.001 1/s Rate sensitivity parameter m 20 50 1 Initial slip resistance τ0 53 120 MPa Saturation slip resistance τs 225 350 MPa Initial hardening modulus h0 160 240 MPa Hardening ratio q 1 1 1