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Local flow stresses in interpenetrating-phase composites based on nanoporous gold — in situ diffraction
Citation Link: https://doi.org/10.15480/882.1687
Publikationstyp
Journal Article
Date Issued
2016-09-23
Sprache
English
TORE-DOI
Journal
Volume
127
Start Page
151
End Page
155
Citation
Scripta Materialia (127): 151-155 (2017)
Publisher DOI
Scopus ID
Publisher
Elsevier
We report a synchrotron in situ diffraction experiment exploring stress evolution during compression of interpenetrating-phase nanocomposites based on nanoporous gold and polymer.While previous experiments provided indirect indication of local flow conditions based on macroscopic effective flow stress and micromechanics models such as Gibson-Ashby scaling law, the lattice parameter data of our experiment access the flow stress directly.
At small structure size we find excellent agreement with previous reports, supporting thematch between material andmodel of those studies. Yet, deviations at larger structure size suggest that coarsening generates defects in metal network structure that are ignored by standard models.
At small structure size we find excellent agreement with previous reports, supporting thematch between material andmodel of those studies. Yet, deviations at larger structure size suggest that coarsening generates defects in metal network structure that are ignored by standard models.
Subjects
nanoporous gold
composites
X-ray diffraction
local stress
small-scale plasticity
DDC Class
620: Ingenieurwissenschaften
Publication version
publishedVersion
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