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Title: Dynamic compaction of nickel powder examined by x-ray phase contrast imaging

Journal Article · · AIP Conference Proceedings
DOI:https://doi.org/10.1063/1.5044929· OSTI ID:1565880
 [1];  [1];  [1];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. National Security Technologies, LLC, Los Alamos,NM (United States)

Understanding the shock response of porous, granular materials is important for many scientific applications. In this work, a propagation-based x-ray phase contrast imaging technique was used to examine the shock compaction response of Ni powder (particle size: 30 and 45 µm), encapsulated in PMMA cylinders, in situ and in real time. The propagating shock wave in the PMMA cylinder and the deformation of the Ni powder column were recorded, but the compaction wave in the Ni powder could not be observed due to insufficient penetration of x-ray photons through the sample. The overall shape of the deformed Ni column downstream of the PMMA shock looked qualitatively similar for both particle sizes: it deformed inward and then outward similar to a converging-diverging nozzle, followed by a ‘mushroom’-like structure at the impact face. A preliminary analysis of our data using shock-polar method provided insight into the observed shock and flow deflection angles at the PMMA/Ni interface, and permitted evaluation of the Ni powder EOS used in this work.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1565880
Report Number(s):
LA-UR-17-27835
Journal Information:
AIP Conference Proceedings, Vol. 1979, Issue 1; Conference: 20.Biennial APS Conference on Shock Compression of Condensed Matter (SCCM-2017), St. Louis, MO (United States), 9-14 July 2017; ISSN 0094-243X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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Cited By (1)

In situ X-ray imaging of heterogeneity in dynamic compaction of granular media journal January 2019