Microstructural Development in Pb-Sn Alloys Subjected to High-Gravity during Controlled Directional Solidification View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

1994

AUTHORS

R. N. Grugel , A. B. Hmelo , C. C. Battaile , T. G. Wang

ABSTRACT

Research conducted over the past three decades has suggested that solidification processing of metals and alloys in a centrifuge can lead to enhanced materials properties.1-11 With the potential of such processing demonstrated, there exists a need for quantitative data gathered under controlled solidification conditions. To this end, a centrifuge, dedicated to materials research, was constructed within the Materials Science and Engineering Department at Vanderbilt University. This has since been employed to investigate the effect of a high-gravity environment on microstructural development of Pb- 50 wt pct Sn alloys during controlled directional solidification.For otherwise constant solidification processing conditions of composition, growth rate, and temperature gradient, centrifugation caused the primary dendrite arm spacing to decrease significantly. The secondary dendrite arm spacing, the eutectic spacing, and the primary dendrite trunk diameters exhibited no change with increasing gravity level.These results are discussed in terms of suppressing convection in the bulk liquid and/or modification of the solute-enriched liquid layer about the dendrite tips. Work in progress to directly visualize effects attributed to enhanced gravity is discussed. More... »

PAGES

101-110

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-1-4615-2520-2_11

DOI

http://dx.doi.org/10.1007/978-1-4615-2520-2_11

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1013383167


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