Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/107209
Type: Artigo de periódico
Title: Correlation Between Unsteady-state Solidification Conditions, Dendrite Spacings, And Mechanical Properties Of Ai-cu Alloys
Author: Quaresma J.M.V.
Carlos A.
Garcia A.
Abstract: The wide range of operational conditions existing in foundry and casting processes generates as a direct consequence a diversity of solidification microstructures. Structural parameters such as grain size and interdendritic spacings are strongly influenced by the thermal behavior of the metal/mold system during solidification, imposing, as a consequence, a close correlation between this system and the resulting microstructure. Mechanical properties depend on the microstructural arrangement defined during solidification. Expressions correlating the mechanical behavior with microstructure parameters should be useful for future planning of solidification conditions in terms of a determined level of mechanical strength, which is intended to be attained. In the present work, analytical expressions have been developed describing thermal gradients and tip growth rate during one-dimensional unsteadystate solidification of alloys. Experimental results concerning the solidification of Al-4.5 \vt pet Cu and Al-15 wt pet Cu alloys and dendritic growth models have permitted the establishment of general expressions correlating microstructure dendrite spacings with solidification processing variables. The correlation of these expressions with experimental equations relating mechanical properties and dendrite spacings provides an insight into the preprogramming of solidification in terms of casting mechanical properties.
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Rights: aberto
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Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-0034489871&partnerID=40&md5=d21ac632ff970b49b5370d2f19ab8f56
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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