Grain refinement of aluminum alloys: Part I. The nucleant and solute paradigms - a review of the literature

Easton, M. and St John, D. H. (1999) Grain refinement of aluminum alloys: Part I. The nucleant and solute paradigms - a review of the literature. Metallurgical & Materials Transactions A, 30A 6: 1613-1623.

Author Easton, M.
St John, D. H.
Title Grain refinement of aluminum alloys: Part I. The nucleant and solute paradigms - a review of the literature
Journal name Metallurgical & Materials Transactions A   Check publisher's open access policy
ISSN 1073-5623
Publication date 1999-05-01
Sub-type Article (original research)
Volume 30A
Issue 6
Start page 1613
End page 1623
Total pages 11
Editor D. E. Laughlin
Place of publication USA
Publisher TMS & ASM
Collection year 1999
Language eng
Subject C1
291403 Alloy Materials
671004 Castings
Abstract Despite the extensive literature on grain refinement, there is not a consensus on the mechanism of grain refinement in aluminum alloys. Recently, there has been a shift in understanding of the grain-refinement paradigm from purely being concerned with the nucleation event, called here the 'nucleant paradigm,' to also being concerned with the effect of solute elements, or, the 'solute paradigm,' on the final grain structure. This article is divided into two parts. In Part I, the literature underpinning both paradigms is explained, and the validity of the paradigm shift toward the solute paradigm as a more complete understanding of grain refinement is presented. Part II experimentally confirms the validity of the solute paradigm and details a mechanism which explains the need for both effective nucleants and a solute of a good segregating power in order to obtain grain refinement.
Keyword Engineering controlled terms
Crystal microstructure
Grain growth
Metallographic phases
Nucleation
Phase diagrams
Engineering uncontrolled terms
Grain refinement
Nucleant paradigms
Solute
Solute paradigms
Engineering main heading
Aluminum alloys
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, 11 Jun 2008, 01:15:12 EST