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Coble-creep response and variability of grain-boundary properties

Published online by Cambridge University Press:  31 January 2011

W. S. Tong ,
J. M. Rickman ,
H. M. Chan  and
M. P. Harmer
W. S. Tong
Affiliation:
Department of Materials Science and Engineering, Lehigh University, Bethlehem, Pennsylvania 18015
J. M. Rickman
Affiliation:
Department of Materials Science and Engineering, Lehigh University, Bethlehem, Pennsylvania 18015
H. M. Chan
Affiliation:
Department of Materials Science and Engineering, Lehigh University, Bethlehem, Pennsylvania 18015
M. P. Harmer
Affiliation:
Department of Materials Science and Engineering, Lehigh University, Bethlehem, Pennsylvania 18015
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Abstract

A microstructural model of steady-state creep that couples grain-boundary transport, micromechanics, and grain sliding is employed to investigate the grain-boundary diffusional creep response of an idealized microstructure with variable boundary diffusivities. Both numerical and analytical methods were used to determine the stress state and, in some cases, the strain rate associated with an applied uniaxial, tensile stress. Various types of boundaries are considered, and the implications of our results for more general microstructures are discussed.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 2 , February 2002 , pp. 348 - 352
Copyright
Copyright © Materials Research Society 2002

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