THE EFFECT OF HELIUM ON RECRYSTALLIZATION AND GRAIN BOUNDARY MOVEMENT IN ALUMINUM
A layer of helium-containing material was formed in samples of cold- worked aluminum by cyclotron alpha -particle irradiation, and this layer was used to observe the effect of helium on subsequent recrystallization and grain growth in the samples. Helium concentrations>10/sup -4/ at.% severely inhibited recrystallization of the layer during post-irradiation heating of the samples, and helium-filled bubbles inhibited grain boundary movement in recrystallized aluminum. Helium concentrations <10/sup -5/ at.% had little effect on either recrystallization or grain boundary movement. Addition to the aluminum of impurities other than helium tended to reduce the inhibiting effect of helium on recrystallization. Calculations indicate that the inhibition of recrystallization was not due to the presence of helium-filled bubbles of radii >10/sup -5/ cm; it must have arisen either from individual helium atoms in solution or from small clusters of helium atoms. (auth)
- Research Organization:
- Atomic Energy of Canada Ltd., Chalk River, Ont.
- NSA Number:
- NSA-17-018784
- OSTI ID:
- 4730773
- Journal Information:
- Acta Met., Journal Name: Acta Met. Vol. Vol: 11
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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