Diffusion behavior of helium in titanium and the effect of grain boundaries revealed by molecular dynamics simulation
Cheng Gui-Jun1, Fu Bao-Qin2, †, , Hou Qing2, Zhou Xiao-Song1, Wang Jun2
       

Diffusion coefficient (D) along the x, y, and z axes as a function of temperature (T) for He in bulk Ti. (a) Zope2003[26] and (b) Cleri1993[28] are used to describe the Ti–Ti interaction. These fitted lines can be explained by Arrhenius relation (ln D = ln D0 − ΔE/kBT) and the migration energy (ΔE) is also anisotropic (ΔEz < ΔEx ≈ ΔEy).