Abstract
Searching for a possibility of registering polymorphic transformations in cobalt under rapid extension, we measured free-surface velocity profiles of high-purity cobalt samples subjected to shock-wave loading at temperatures of 20–400 °C. In this temperature range, the spalling strength of cobalt at rates of its extension of 105 – 106 sec−1 was measured, and the relaxation properties of this material under compression in the shock-wave front were estimated. In the experiments, we failed to observe expected wave-profile anomalies due to possible high-temperature polymorphic transformation of cobalt under extension. Most probably, the volume change due to transformation is too small to exert notable influence on the wave-profile structure. Key words: high-purity cobalt, shock compression, phase transformations, spalling strength, temperature.
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Razorenov, S.V., Kanel', G.I., Kramshonkov, E.N. et al. Shock Compression and Spalling of Cobalt at Normal and Elevated Temperatures. Combustion, Explosion, and Shock Waves 38, 598–601 (2002). https://doi.org/10.1023/A:1020303004747
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DOI: https://doi.org/10.1023/A:1020303004747