M
M.F. Ashby
Researcher at Harvard University
Publications - 32
Citations - 10957
M.F. Ashby is an academic researcher from Harvard University. The author has contributed to research in topics: Creep & Grain boundary. The author has an hindex of 27, co-authored 32 publications receiving 10270 citations. Previous affiliations of M.F. Ashby include University of Cambridge.
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The deformation of plastically non-homogeneous materials
TL;DR: The geometrically necessary dislocations as discussed by the authors were introduced to distinguish them from the statistically storages in pure crystals during straining and are responsible for the normal 3-stage hardening.
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Diffusion-accommodated flow and superplasticity
M.F. Ashby,R. A. Verrall +1 more
TL;DR: In this article, a new mechanism for superplastic deformation is described and modelled, which differs fundamentally from Nabarro-Herring and Coble creep in a topological sense: grains switch their neighbors and do not elongate significantly.
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On grain boundary sliding and diffusional creep
Rishi Raj,M.F. Ashby +1 more
TL;DR: In this paper, the problem of sliding at a nonplanar grain boundary is considered in detail, and the results give solutions to the following problems: 1) How much sliding occurs in a polycrystal when neither diffusive flow nor dislocation motion is possible? 2) What is the sliding rate at a wavy or stepped grain boundary when diffusional flow of matter occurs? 3) How is the rate of diffusional creep in polycrystals in which grain boundaries slide? 4) how is this creep rate affected by grain shape, and grain boundary migration? 5)
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A first report on deformation-mechanism maps
TL;DR: Deformations-mechanism maps as discussed by the authors display the fields of stress and temperature in which a particular mechanism of plastic flow is dominant, i.e., dislocation glide, diffusional flow and dislocation creep.
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Intergranular fracture at elevated temperature
Rishi Raj,M.F. Ashby +1 more
TL;DR: In this paper, the authors analyzed the kinetic problem of intergranular fracture at elevated temperatures by the nucleation and growth of voids in the grain boundary and calculated the time-to-fracture.