Eutectic growth mode in strontium, antimony and phosphorus modified hypoeutectic Al-Si foundry alloys

Nogita, K and Dahle, AK (2001) Eutectic growth mode in strontium, antimony and phosphorus modified hypoeutectic Al-Si foundry alloys. Materials Transactions, 42 3: 393-396. doi:10.2320/matertrans.42.393


Author Nogita, K
Dahle, AK
Title Eutectic growth mode in strontium, antimony and phosphorus modified hypoeutectic Al-Si foundry alloys
Journal name Materials Transactions   Check publisher's open access policy
ISSN 1345-9678
Publication date 2001-01-01
Sub-type Article (original research)
DOI 10.2320/matertrans.42.393
Volume 42
Issue 3
Start page 393
End page 396
Total pages 4
Editor A Kamino
Y Ohmori
T Sakamoto
Place of publication Japan
Publisher Japan Institute of Metals
Language eng
Subject C1
291403 Alloy Materials
671004 Castings
Abstract The effect of strontium (Sr), antimony (Sb) and phosphorus (P) on nucleation and growth mode of the eutectic in hypoeutectic Al-10 mass%Si alloys has been investigated by electron back-scattering diffraction (EBSD) mapping. Specimens were prepared from a hypoeutectic Al-10 mass%Si base alloy, adding different levels of strontium, antimony and phosphorus for modification of eutectic silicon. By comparing the orientation of the aluminium in the eutectic to that of the surrounding primary aluminium dendrites, the solidification mode of the eutectic could be determined. The results of these studies show that the eutectic nucleation mode, and subsequent growth mode, is strongly dependent on additive elements. The EBSD mapping results indicate that the eutectic grew from the primary phase in unmodified and phosphorus-containing alloys. When the eutectic was modified by strontium or antimony, eutectic grains nucleated and grew separately from the primary dendrites.
Keyword Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Aluminium-silicon Alloys
Eutectic Growth
Solidification
Strontium
Antimony
Phosphorus
Modification
Electron Backscattering Diffraction
Silicon
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
 
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Created: Wed, 15 Aug 2007, 02:24:36 EST