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Convection and dendrite crystallizationThe convection and thermal conditions in aqueous and metallic liquid systems under conditions of the Dendrite Remelting Rocket Experiment were assessed to help establish the relevance of the rocket experiment to the metals casting phenomena. The results of the study indicate that aqueous or metallic convection velocities in the cell are of insignificant magnitudes at the 0.0001 to 0.00001 g levels of the experiment. The crystallization phenomena observed in the rocket experiment, therefore, may be indicative of how metals will solidify in low-g. The influence of possibly differing thermal fields, however, remains to be assessed. The rocket experiment may also be relevant to how metals solidify on the ground at temperature differences and in cell configurations such that the flow velocities are not high enough to break or bend delicate dendrite arms. Again, however, the influence of the thermal fields must be assessed.
Document ID
19770036989
Document Type
Conference Paper
Authors
Grodzka, P. G. (Lockheed Missiles and Space Co., Inc. Huntsville, Ala., United States)
Johnston, M. H. (Lockheed Missiles and Space Co. Huntsville, AL, United States)
Griner, C. S. (NASA Marshall Space Flight Center Huntsville, Ala., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1977
Subject Category
SOLID-STATE PHYSICS
Report/Patent Number
AIAA PAPER 77-120
Meeting Information
Aerospace Sciences Meeting(Los Angeles, CA)
Distribution Limits
Public
Copyright
Other