氢扩散模型对临氢结构裂尖氢浓度计算影响

诸滔, 孙浩翔, 周亚洪, 赵宇航, 王艳飞

Effect of Hydrogen Diffusion Model on Hydrogen Concentration Calculation Around a Crack Tip in Hydrogen-exposed Structures

ZHU Tao, SUN Haoxiang, ZHOU Yahong, ZHAO Yuhang, WANG Yanfei

表1 热传导和扩散的类比

Table 1 Analogy between heat conduction and mass diffusion

Heat conduction Diffusion Governing equation ρ∂U∂t=∇⋅k∇T Governing equation ∂C∂t=∇⋅D∇CL Internal energy U=cpT Total concentration C=CL+CT Heat flux q=-k∇T Mass flux J=-D∇CL Temperature T Lattice concentration CL Heat conductivity k Lattice diffusion coefficient DL Heat capacity cp - DL/Dapp Density ρ - 1