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Annealing behavior of Au films was examined by electron microscopy. The specimens were prepared from KCN bath by electrodeposition on pure iron and quenched carbon steel, and heated to 600°C under the electron microscope with JEM-AHG stage and in an electric vacuum furnace under reduced pressure of about 10-5mmHg. The films were 600-2, 000Å in thickness. During this experiment, annealing behavior such as recrystallization was not observed and the initial orientation of as-deposited films was maintained. When a specimen obtained on pure iron was heated at 250°C, the dislocation density decreased and the sub-grains grew up in size. The dislocation density of the films was about 5-8×109cm-2 after annealing at 360°C for 1hr. Stacking faults and micro-twins, which had been formed during electrodeposition, disappeared by heating at above 300°C. The annealing behavior of Au films electrodeposited on quenched carbon steel was identical with that of the films deposited on pure iron. Consequently, the morphology of Au films, which had been inherited from martensite, showed little change after annealing.
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