Segregation and grain refinement in cast titanium alloys

Bermingham, M. J., McDonald, S. D., StJohn, D. H. and Dargusch, M. S. (2009) Segregation and grain refinement in cast titanium alloys. Journal of Materials Research, 24 4: 1529-1535. doi:10.1557/JMR.2009.0173


Author Bermingham, M. J.
McDonald, S. D.
StJohn, D. H.
Dargusch, M. S.
Title Segregation and grain refinement in cast titanium alloys
Journal name Journal of Materials Research   Check publisher's open access policy
ISSN 0884-2914
Publication date 2009-04
Sub-type Article (original research)
DOI 10.1557/JMR.2009.0173
Volume 24
Issue 4
Start page 1529
End page 1535
Total pages 7
Editor Gary L. Messing
Place of publication United States of America
Publisher Materials Research Society
Collection year 2010
Language eng
Subject C1
091207 Metals and Alloy Materials
861201 Coated Metal and Metal-Coated Products
Abstract The growth restriction factor is a parameter derived from binary phase diagrams and is a useful predictor for the grain refining response when a solute is added to a base alloy. This work investigates the relevance of growth restriction theory to titanium alloys where solidification rates are an order of magnitude faster than previous studies in aluminum- and magnesium-based systems. In particular, the segregation of Fe and Cr in titanium is investigated and the effects on grain size studied. It was found that the Scheil equation reasonably modeled solidification of titanium where cooling rates approach 120 degrees C/s, and the growth restriction factors for Fe and Cr were useful in predicting prior-beta grain refinement. However, it was found that caution must be used when calculating growth restriction factors from binary phase diagrams.
Keyword RAPID SOLIDIFICATION
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Mechanical & Mining Engineering Publications
 
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Created: Thu, 03 Sep 2009, 07:55:52 EST by Mr Andrew Martlew on behalf of School of Mechanical and Mining Engineering