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#17892, Combined Compression and Shear Plate Impact Experiments to Study Beta to Gamma Phase Evolution in Pure Tin

The work presents results of combined compression and shear plate impact experiments to study phase evolution (beta to gamma) in pure tin. In order to conduct the experiments thin tin foil samples of approximately 150 microns in thickness are sandwiched between two hard tungsten carbide plates and shock compressed to normal pressures up to15 GPa followed by shear loading. The results of the experiments provide critical information on the individual roles of compression and shear stresses on the phase transformation kinetics of tin. Moreover, the experiments are used to determine the shear strength of pure tin in the un-transformed beta phase and its transformed gamma phase. These results are useful in understanding the competition between spall and ejecta formation and cavitation and jet formation in pure tin.

Shahram Askeri   Washington State University
Vikas Prakash   Washington State University