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Changes in solidified microstructuresThe properties and casting behavior of metals are significantly affected by their cast structure. This structure is optimized by producing columnar versus equiaxed grains and coarse versus fine grains by controlling solidification conditions. The transition from columnar to equiaxed grains is favored by: constitutional supercooling with effective nucleation of free dendrites; melting off and transport of dendrite tips and arms; mechanical vibration; falling down of free dendrites from a chilled top surface; and induced flow in the solidifying structure by oscillation of rotation.
Document ID
19840026524
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wallace, J. F.
(Case Western Reserve Univ. Cleveland, OH, United States)
Date Acquired
August 12, 2013
Publication Date
September 1, 1984
Publication Information
Publication: NASA. Lewis Research Center Fundamentals of Alloy Solidification Appl. to Industrial Processes
Subject Category
Metallic Materials
Accession Number
84N34595
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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