Grain refinement in rapidly solidified W-Si alloys

Grain refinement in rapidly solidified W--Si alloys has been investigated with respect to Si content and solidification rate. Solid-solution W--Si alloys with varying Si content were prepared into small buttons by arc melting, from which rapidly quenched foils of various thickness were made by the h...

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Bibliographic Details
Published in:Journal of materials science 1991-11, Vol.26 (21), p.5911-5914
Main Authors: SOON-GUN KIM, WHANG, S. H
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Metals. Metallurgy
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Solidification
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Summary:Grain refinement in rapidly solidified W--Si alloys has been investigated with respect to Si content and solidification rate. Solid-solution W--Si alloys with varying Si content were prepared into small buttons by arc melting, from which rapidly quenched foils of various thickness were made by the hammer and anvil technique. The grain size of the foils was studied with respect to thickness and Si content. The results show that the grain size is inversely proportional to the thickness of a foil and also is an exponential function of Si content on an empirical basis. The combined effect of cooling rate and Si content on the grain size can be expressed by an exponential function.
ISSN:0022-2461
1573-4803
DOI:10.1007/BF01130133