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Type: Artigo de periódico
Title: Microstructural development during transient directional solidification of hypermonotectic Al-Bi alloys
Author: Silva, AP
Spinelli, JE
Mangelinck-Noel, N
Garcia, A
Abstract: Directional unsteady-state solidification experiments were performed with hypermonotectic Al-5.0 wt%Bi and 7.0 wt%Bi alloys. Thermal parameters such as the growth rate (upsilon) and the thermal gradient (G) were experimentally determined by cooling curves recorded along the casting length. The predominant Bi-rich phase was characterized by droplets embedded in the aluminum matrix. Both the interphase spacing (lambda) and the Bi-rich particles diameter (d) were measured along the casting length. These microstructural features were correlated to the solidification thermal parameters: growth rate, cooling rate and thermal gradient. An experimental law expressing). as a function of both G and upsilon was found to better represent the growth of hypermonotectic Al-Bi alloys. Moreover, it was found that the interphase spacing decreases with increasing alloy bismuth content. (C) 2010 Elsevier Ltd. All rights reserved.
Subject: Casting
Non-ferrous metals and alloys
Thermal analysis
Country: Inglaterra
Editor: Elsevier Sci Ltd
Citation: Materials & Design. Elsevier Sci Ltd, v. 31, n. 10, n. 4584, n. 4591, 2010.
Rights: fechado
Identifier DOI: 10.1016/j.matdes.2010.05.046
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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