Denuded zones, diffusional creep, and grain boundary sliding

The appearance of denuded zones following low stress creep in particle-containing crystalline materials is both a microstructural prediction and observation often cited as irrefutable evidence for the Nabarro-Herring (N-H) mechanism of diffusional creep. In the present article, the evidence for such...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2002-02, Vol.33 (2), p.219-229
Main Authors: WADSWORTH, Jeffrey, RUANO, Oscar A, SHERBY, Oleg D
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: structure, mechanical and thermal properties
Creep
Crystals
Exact sciences and technology
Grain
Materials science
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Metals. Metallurgy
Physics
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Summary:The appearance of denuded zones following low stress creep in particle-containing crystalline materials is both a microstructural prediction and observation often cited as irrefutable evidence for the Nabarro-Herring (N-H) mechanism of diffusional creep. In the present article, the evidence for such denuded zones is critically examined. It is proposed that grain boundary sliding accommodated by slip is the rate-controlling process in the stress range where denuded zones have been observed.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-002-0084-7