Dynamic response of Sn over the temperature range 115–503 K

Planar impact experiments were performed with high purity (99.9985 %) and commercial purity (99.8 %) tin over the temperature range 115 to 503 K. The free surface velocity histories of 2-mm tin samples impacted by 0.5-mm copper flyer plates having velocity of about 350 m/s were recorded with the VISAR. The impact response of the coarse-grain samples of both the tins is associated with relatively large scattering of the Hugoniot elastic limit, the plastic wave rise time, and the spall strength. The dynamic tensile (spall) strength of both the alloys show weak growth with temperature with exception of the close, 15–20 K vicinity of the tin melting point where the spall strength of both the alloys experiences an abrupt two-fold drop. The dynamic shear stresses show obvious trend to grow or at least do not decrease with the increasing temperature. The free surface velocity histories and the spall data obtained below 286 K do not show any peculiarities which could be associated with the β–α transition in tin