Abstract
Shock-loading of a material in contact with a high explosive (HE) experiences a Taylor wave (triangular wave) loading profile. Samples of 316L stainless steel were shock loaded to several peak pressures to examine the influence of square-topped and triangular (Taylor-wave)-shaped pulse loading on spallation behavior. The 316L SS sample loaded to 6.6 GPa using a square-topped pulse with a pulse duration of 0.9 μsec displayed incipient spallation while the sample loaded to the identical peak shock pressure but with a triangular-shaped loading pulse (which immediately unloads the sample after the peak Hugoniot stress is achieved) exhibited no damage. To achieve an approximately equivalent level of incipient spall using a triangular-shaped loading pulse, an - 2X increase in the peak Hugoniot stress was required. Detailed metallographic and microtextural analysis of the damage evolution in spalled 316L SS samples as a function of loading pulse shape and the peak Hugoniot stress is presented.
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