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Title: A metallography and x-ray tomography study of spall damage in ultrapure Al

We characterize spall damage in shock-recovered ultrapure Al with metallography and x-ray tomography. The measured damage profiles in ultrapure Al induced by planar impact at different shock strengths, can be described with a Gaussian function, and showed dependence on shock strengths. Optical metallography is reasonably accurate for damage profile measurements, and agrees within 10–25% with x-ray tomography. Full tomography analysis showed that void size distributions followed a power law with an exponent of γ = 1.5 ± 2.0, which is likely due to void nucleation and growth, and the exponent is considerably smaller than the predictions from percolation models.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ; ; ;  [4] ;  [5] ;  [3] ;  [1] ;  [6] ;  [5] ;  [7]
  1. School of Science, Wuhan University of Technology, Wuhan, Hubei 430070 (China)
  2. (United States)
  3. (China)
  4. The Peac Institute of Multiscale Sciences and Sichuan University, Chengdu, Sichuan 610207 (China)
  5. HPSynC@Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  6. Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  7. National Key Laboratory of Shock Wave and Detonation Physics, Chinese Academy of Engineering Physics, Mianyang, Sichuan 621900 (China)
Publication Date:
OSTI Identifier:
22300248
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 4; Journal Issue: 7; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; FORECASTING; GAUSS FUNCTION; METALLOGRAPHY; NUCLEATION; TOMOGRAPHY; X RADIATION