Molybdenum Dynamic Yield Strength Measured via the Tamped RMI Method
Travis Voorhees, Sandia National Laboratories, California
The high pressure and high strain rate dynamic strength of Molybdenum (Mo) is experimentally and computationally investigated in the 3-20 GPa stress and 105-106 /s strain rate regime using the tamped Richtmyer-Meshkov instability method. Plate impact experiments are performed at Argonne National Laboratory’s Advanced Photon Source’s Dynamic Compression Sector (DCS), driving a planar shock front through a corrugated Mo-D2O or Mo-perfluorooctane (C8F18) interface, forcing the corrugation to invert and form a jet. The extent of the deformation (jet length, jet shape, etc.) is experimentally measured using X-ray phase contrast imaging at the DCS. Numerical simulations are performed using the Eulerian code CTH and calibrated against the experimental radiographs. Mo yield strength, Y, as a function of shock pressure, P, strain rate, ϵ ̇, and temperature, T, is determined for each impact experiment and presented.
Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia LLC, a wholly owned subsidiary of Honeywell International Inc. for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.
Abstract Author(s): Travis Voorhees, Athena Padgiotis, Ben Zussman, Shuye Guo, Vince Garcia, Tracy Vogler