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| GRAIN BOUNDARY MIGRATION IN RECRYSTALLIZED ARMCO IRON DURING GRAIN GROWTH |
| Wu Cheung-hung; Chuang Yu-chih Institute of Metal Research; Academia Sinica |
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Cite this article:
Wu Cheung-hung; Chuang Yu-chih Institute of Metal Research; Academia Sinica. GRAIN BOUNDARY MIGRATION IN RECRYSTALLIZED ARMCO IRON DURING GRAIN GROWTH. Acta Metall Sin, 1960, 5(1): 15-23.
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Abstract Grain boundary migration in recrystallised Armco iron during grain growth has been studied by vacuum etching method. It was found that grain growth in recrystallised α-ferrite is closely related with substructures within the ferrite grains, grains containing no substructures usually grow at the expense of those possessing substructures.Through tracing and analysing the remaining grooves of the migrating grain boundaries and together with other observations, we have confirmed the following theories suggested by previous investigators.1. The main driving force for grain boundary migration is interfacial energy of the grains.2. The manner in which grains in metals disappear is basically the same as that of soap bubbles in a semi-evacuated container.3. Burke's model for the formation of new grain boundaries at the expense of old ones.4. Grain growth is a discontinuous process.
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Received: 18 January 1960
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