Correlation of thermal pits and condensation cavities in aluminum

A new insight into grain growth kinetics in terms of polygonized sub-structure development

“…After two cycles, the grain boundary su~face revealed no modification in its morphology; however, after 10 cycles, the grain boundary became slightly faceted as shown in Figure 9(a), in-**The authors (43)(44) have shown that the interface morphology is not noticeably affected by the liquid gallium film. thought it would be interesting to find out· how this substructure interacts with grain boundaries.…”

“…To follow the evolution of the intergranular surface with thermal cycling, we employed a new method of grain boundary separation by liquid gallium** developed by Roques-Carmes et at. (43)(44) for stresses generate dislocations which can rearrange themselves in polygonization walls during subsequent annealing. Whereas the driving Jorce for normal grain growth decreases continuously with increasing time, the force restraining grain boundary migration progressively increases with the development of a well-polygonized network.…”