Shock Compaction of Al Powder Examined by X-Ray Phase Contrast Imaging
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Shock compaction response of ∼50% porous aluminum powder, encapsulated in PMMA cylinders and impacted at 0.3–1.7 km/s using 6061-T6 Al impactors, was examined in situ and in real time using a propagation-based X-ray phase contract imaging (PCI) technique capable of providing micron spatial resolution at the Advanced Photon Source. Numerical simulations of the PCI data accurately captured the propagating compaction shock wave in the powder and the deformation of the powder column.
KeywordsShock compaction Aluminum powder X-ray phase contrast imaging Shock-polar method CTH simulation
This publication is based upon work performed by Los Alamos National Laboratory (LANL) and Sandia National Laboratories (SNL) at the Dynamic Compression Sector (DCS) of the Advanced Photon Source (APS). All PCI data shown in this work were obtained using LANL’s novel multi-frame X-ray phase contrast imaging (MPCI) system developed on the IMPULSE capability at APS. A.M. and B.J.J. acknowledge the financial support provided by LANL Science Campaigns, Joint Munitions Program (JMP), and MaRIE concept, and National Security Technologies (NSTec) Shock Wave Physics Related Diagnostic (SWRD) program. M.H and S.R. acknowledge financial support provided by the Truman fellowship (LDRD) and Science Campaigns within SNL. Paulo Rigg and the DCS team is thanked for their assistance with the experiments; Chuck Owens, Joe Rivera (LANL) and Jim Williams (SNL) are thanked for target assembly; Adam Iverson, Carl Carlson and Matt Teel (NSTec) are thanked for their assistance with the PCI system. LANL is operated by Los Alamos National Security, LLC for the U.S. Department of Energy (DOE) under Contract No. DE-AC52-06NA25396. SNL 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. DOE, NNSA under contract DE-NA0003525. DCS is supported by the U. S. DOE, NNSA, under Award Number DE-NA0002442 and operated by Washington State University (WSU). This research used resources of APS, a U.S. DOE Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
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