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Production of Al–Ti–C grain refiner alloys by reactive synthesis of elemental powders: Part II. Grain refining performance of alloys and secondary processing

Published online by Cambridge University Press:  31 January 2011

H. J. Brinkman ,
F. Zupanič ,
J. Duszczyk  and
L. Katgerman
H. J. Brinkman
Affiliation:
Delft University of Technology, Laboratory of Materials Science, Rotterdamseweg 137,2628 AL Delft, The Netherlands
F. Zupanič
Affiliation:
University of Maribor, Faculty of Mechanical Engineering, Smetanova 17, SI-2000 Maribor, Slovenia
J. Duszczyk
Affiliation:
Delft University of Technology, Laboratory of Materials Science, Rotterdamseweg 137,2628 AL Delft, The Netherlands
L. Katgerman
Affiliation:
Delft University of Technology, Laboratory of Materials Science, Rotterdamseweg 137,2628 AL Delft, The Netherlands
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Abstract

This article, Part II in a series, reports on the grain refining performance of the Al–Ti–C alloys produced by reactive synthesis. Grain refinement was tested as a function of the following parameters in the reaction synthesis process: Ti content, Ti/C ratio, and cooling rate after the reaction. The grain refining performance of the alloys in the as-synthesized condition was limited due to either a shortage of TiC particles or an insufficient amount of aluminum matrix. Dilution of the alloys to a nominal composition of 3 wt% Ti, followed by extrusion improved the grain refinement to the level of commercially available Al–Ti–C grain refining alloys. A prerequisite for successful secondary processing is that the conversion of carbon is completed in the reaction synthesis; otherwise Al4C3 is formed rather than TiC.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 12 , December 2000 , pp. 2628 - 2635
Copyright
Copyright © Materials Research Society 2000

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References

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