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The mechanical properties of fluoride salts at elevated temperaturesThe deformation behavior of CaF2 and LiF single crystals compressed in the 111 and the 100 line directions, respectively, are compared with the mechanical properties of polycrystalline LiF-22 (mol pct) CaF2 eutectic mixture in the temperature range 300 to 1275 K for strain rates varying between 7 x 10 to the -7th and 0.2/s. The true stress-strain curves for the single crystals were found to exhibit three stages in an intermediate range of temperatures and strain rates, whereas those for the eutectic showed negative work-hardening rates after a maximum stress. The true stress-strain rate data for CaF2 and LiF-22 CaF2 could be represented by a power-law relation with the strain rate sensitivities lying between 0.05 and 0.2 for both materials. A similar relation was found to be unsatisfactory in the case of LiF.
Document ID
19900057321
Document Type
Conference Paper
Authors
Raj, S. V. (NASA Lewis Research Center Cleveland, OH, United States)
Whittenberger, J. D. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
NONMETALLIC MATERIALS
Meeting Information
Intl. Conference on Strength of Metals and Alloys (ICSMA 8)(Tampere)
Distribution Limits
Public
Copyright
Other