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In-Situ Microtomographic Characterization of Single-Cavity Growth During High-Temperature Creep of Leaded Brass

Authors
  • Isaac, A.1, 2
  • Dzieciol, K.3, 4
  • Sket, F.3, 5
  • Borbély, A.3, 4
  • 1 Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Berlin, 14109, Germany , Berlin (Germany)
  • 2 Brazilian Synchrotron Light Laboratory, Campinas, SP, 13083-970, Brazil , Campinas (Brazil)
  • 3 Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, 40237, Germany , Düsseldorf (Germany)
  • 4 École Nationale Supérieure des Mines de Saint-Étienne 158, Cours Fauriel, Saint-Étienne, Cedex 2, F-42023, France , Saint-Étienne (France)
  • 5 IMDEA Materials Institute, Madrid, 28040, Spain , Madrid (Spain)
Type
Published Article
Journal
Metallurgical and Materials Transactions A
Publisher
Springer US
Publication Date
Jul 20, 2011
Volume
42
Issue
10
Identifiers
DOI: 10.1007/s11661-011-0781-1
Source
Springer Nature
Keywords
License
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Abstract

Synchrotron microtomography was used for in-situ characterization of high-temperature creep damage in leaded brass. Applying image registration to subsequent tomographic reconstructions, the volumetric growth rate of single cavities with equivalent radii between 2 and 4.3 μm was assessed. We conclude from the volume dependence of the growth rates that both the viscous flow and grain boundary (GB) diffusion mechanisms influence void growth. We show that void growth in leaded brass is retarded by negative stress triaxiality, which develops in the matrix during heating the specimen to the deformation temperature.

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