Uncertainty in separating the strain contributions of sliding and diffusion in diffusional creep

Significant efforts have been directed towards the quantification of individual contributions from diffusion and grain boundary sliding to the overall strain during diffusional creep. However, these analyses are based on several simplifying assumptions such as considering grains of equal sizes/shape...

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Bibliographic Details
Published in:Scripta materialia 2001-03, Vol.44 (5), p.841-845
Main Authors: Sahay, Satyam S, Murty, G.S
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Creep
Diffusion
Exact sciences and technology
Grain boundaries
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Physics
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Summary:Significant efforts have been directed towards the quantification of individual contributions from diffusion and grain boundary sliding to the overall strain during diffusional creep. However, these analyses are based on several simplifying assumptions such as considering grains of equal sizes/shapes, and the total strain is achieved in a single step. However, in a real system undergoing diffusional creep there will be a large number of grains with varying grain size, aspect ratio and orientation. All these directly influence the diffusional creep process. Moreover, as the diffusional creep evolves with time through infinitesimally small steps, these parameters will continuously change thereby making it impossible to separate the contributions of sliding and diffusion in a practically meaningful situation.
ISSN:1359-6462
1872-8456
DOI:10.1016/S1359-6462(00)00655-2