Published September 1976
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Solidification microstructures of aluminium-uranium alloys
Description
The solidification of microstrutures of aluminium-uranium alloys in the range of 4 to 20% uranium is investigated. The solidification was obtained both in ingot molds and under controlled directional solidification. The conditions for the presence of primary crystals and eutectic are discussed and an analysis of the influence of variables (growth rate and thermal gradient in the liquid) on the alloy structure is made. The effect of cooling rate on the alloy structures has been determined. It is found that the resulting structure can be derived from the kinectics concept, as required by the coupled-zone theory. Suggestions on the qualitative intervals of composition and temperatures with eutectic growth are presented
Availability note (English)
MF available from INIS under the Report Number.Abstract (Portuguese)
Examinam-se as microestruturas de solidificacao de ligas aluminio-uranio, com teores de 4 a 20% U, obtidos por solidificacoes convencional e unidirecional. Procura-se verificar quais as condicoes para formacao dos cristais primarios e do eutetico para o sistema Al-UAl4, e analisar a influencia das variaveis sobre a estrutura obtida. Estuda-se o efeito da velocidade de resfriamento sobre as estruturas das ligas, principalmente as de composicoes euteticas (13%U) e hipereuteticas (acima de 13%U). Analisa-se os efeitos da velocidade de crescimento e do gradiente termico no liquido. Mostra-se que as estruturas podem ser analisadas utilizando-se o conceito cinetico de regiao de crescimento conjunto 'coupled zone'. Sugere-se a localizacao qualitativa do intervalo de composicoes e temperaturas no qual se tem crescimento euteticoFiles
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Additional details
Additional titles
- Original title (Portuguese)
- Microestructuras de solidificacao de ligas aluminio-uranio
Publishing Information
- Imprint Pagination
- 17 p.
- Journal Issue
- no. 436
- Series
- Publicacao IEA.
- Report number
- IEA--436
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 8332090
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ALUMINIUM BASE ALLOYS; CRYSTAL GROWTH; EUTECTICS; MICROSTRUCTURE; SOLIDIFICATION; URANIUM ALLOYS
- Descriptors DEC
- ACTINIDE ALLOYS; ALLOYS; ALUMINIUM ALLOYS; CRYSTAL STRUCTURE