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Title: Three-dimensional evaluation of the compression and recovery behavior in a flexible graphite sheet by synchrotron radiation microtomography

The compression and unloading behavior of flexible graphite sheets was investigated using synchrotron radiation microtomography with 1 {mu}m voxel size. The recovery ratio of the flexible graphite sheet was measured accurately by in-situ observation. The three-dimensional strain distribution in the interior of the specimen was obtained using the microstructural tracking method. The inner strain distribution with micrometer scale indicated inhomogeneous deformation. The microstructural tracking analysis revealed that deformation units exist in the flexible graphite sheet. The units seem to deform, affecting the neighboring units with each other. The units had a similar size and shape with compacted exfoliated graphite worms that constitute the flexible graphite sheet. Microscopic deformations during compression and unloading are surely affected by the microstructure of the sheet. Highlights: Black-Right-Pointing-Pointer The compression and recovery behavior was investigated using microtomography. Black-Right-Pointing-Pointer The tracking analysis revealed that deformation units exist in the specimen. Black-Right-Pointing-Pointer Each unit deforms in relation to the neighboring unit.
Authors:
 [1] ;  [1] ; ; ;  [2]
  1. Department of Mechanical Engineering, Toyohashi University of Technology, Toyohashi, AICHI 441-8580 (Japan)
  2. Japan Synchrotron Radiation Research Institute, Sayo-gun, HYOGO 679-5198 (Japan)
Publication Date:
OSTI Identifier:
22066470
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Characterization; Journal Volume: 69; Journal Issue: Complete; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPRESSION; DEFORMATION; GRAPHITE; MICROSTRUCTURE; PHOTON COMPUTED TOMOGRAPHY; SHEETS; STRAINS; SYNCHROTRON RADIATION; THREE-DIMENSIONAL CALCULATIONS; UNLOADING; X RADIATION