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

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Materials Processing in High Gravity

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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.

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Authors and Affiliations

  1. Center for Microgravity Research and Applications, Vanderbilt University, Box 6079-B, Nashville, TN, 37235, USA

    R. N. Grugel, A. B. Hmelo & T. G. Wang

  2. Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, 48109, USA

    C. C. Battaile

Authors
  1. R. N. Grugel
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  2. A. B. Hmelo
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  3. C. C. Battaile
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  4. T. G. Wang
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Liya L. Regel William R. Wilcox

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© 1994 Springer Science+Business Media New York

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Grugel, R.N., Hmelo, A.B., Battaile, C.C., Wang, T.G. (1994). Microstructural Development in Pb-Sn Alloys Subjected to High-Gravity during Controlled Directional Solidification. In: Regel, L.L., Wilcox, W.R. (eds) Materials Processing in High Gravity. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-2520-2_11

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  • DOI: https://doi.org/10.1007/978-1-4615-2520-2_11

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4613-6073-5

  • Online ISBN: 978-1-4615-2520-2

  • eBook Packages: Springer Book Archive

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