A metallographic study of diffusion-induced grain boundary migration in the Fe-Zn system

Diffusion-induced grain boundary migration has been studied by zincification of pure iron. The temperature dependence of the rate was measured at 460–650°C A change in morphology was observed between 460 and 650°C and may explain the fact that the phenomenon changed character at higher temperatures. The temperature dependence of v/Dhδ may be decisive, v being the rate of migration. Dh the grain boundary diffusivity and δ the thickness of grain...