1 Department of Wind Energy, Technical University of Denmark 2 Materials science and characterization, Department of Wind Energy, Technical University of Denmark 3 Tsinghua University 4 Tsinghua University
The migration of a recrystallization boundary in pure aluminum was followed during in situ annealing in a scanning electron microscope. The microstructure was characterized using the electron channeling contrast technique, and a typical stop-go grain boundary motion was observed during annealing. Thermal grooving associated with boundary migration on the inspected free surface was characterized after the in-situ experiment using atomic force microscopy. The results show that new thermal grooves develop at places where the recrystallization boundary segments remain stationary for a relatively long time. The kinetics of thermal grooving are determined. Effects of the surface oxidation layer on the formation of thermal grooving as well as the overall influence of grooves on boundary migration are discussed. © (2013) Trans Tech Publications, Switzerland.
Materials Science Forum, 2013, Vol 753, p. 117-120
Aluminum; Atomic force microscopy; Grain boundaries; Grain growth; Scanning electron microscopy; Recrystallization (metallurgy); Boundary migration; Thermal grooves
Main Research Area:
5th International Conference on Recrystallization and Grain Growth, 2013