Razorenov, S. V.; Garkushin, G. V.; Kanel, G. I.; Popov, N. N.
December 2009
AIP Conference Proceedings;12/28/2009, Vol. 1195 Issue 1, p1027
Conference Proceeding
The behavior of Ni48.9-Ti51.1 and Ni50.6-Ti49.4 shape memory alloys under shock wave loading was investigated in the temperature range of their martensitic transformations. Tested samples had the grain sizes ∼15 to 30 μm and 0.05 to 0.3 μm. Measured free surface velocity histories has demonstrated influence of the martensitic transformation on response of the alloys to shock-wave loading. The dependences of HEL on both the temperature and the alloy composition are similar to quasi-static flow stress data. Refining of the grain size not only increases the HEL values but also shifts the transitions to lower temperatures. The pseudoelastic behavior in sub-microsecond time range results in formation of rarefaction shock.


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