Modelling Interface Diffusion Creep: Single Phase Insights and Two Phase Challenges

John Wheeler; J.M. Ford

doi:10.4028/www.scientific.net/MSF.715-716.983

Paper Titles

Annealing Phenomena in Cu/Ni Composite Electrodeposit
p.952

Migration of Dislocation Boundaries in a Modified P911 3%Co Heat Resistant Steel during Tempering, Ageing and Creep
p.953

On the Recrystallization Kinetics of 3D Potts Monte Carlo Simulations
p.959

Modelling of Recrystallization Curves of Porous Copper-Titanium Powder Materials
p.965

Analytical Expressions for Formal Kinetics
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The Influence of Subgrain Size on the Bainite Refinement for Steels
p.977

Modelling Interface Diffusion Creep: Single Phase Insights and Two Phase Challenges
p.983

Investigations on Interaction between Recrystallization and Precipitation at Finishing Steps of Seamless Tube Rolling
p.988

The Evolution of Structure and Mechanical Properties of Fe-Mn-V-Ti-0,1C Low-Carbon Steel Subjected to Severe Plastic Deformation and Subsequent Annealing
p.994

HomeMaterials Science ForumMaterials Science Forum Vols. 715-716Modelling Interface Diffusion Creep: Single Phase...

Modelling Interface Diffusion Creep: Single Phase Insights and Two Phase Challenges

Abstract:

Numerical and analytic models for diffusion creep have commercial and geological uses. For single phase polycrystals, numerical models of interface diffusion creep illustrate how grains rotate and what the relative contributions of grain shape change and grain boundary sliding are to the overall strain. In particular they shows that an equi-axed starting material will initially show large grain angular velocities but that these slow down as grain become slightly elongate. A steady state microstructure with some grain elongation and little or no grain rotation is reached. Consequently the equi-axed grain shapes seen in superplastic deformation require additional processes for a full explanation. For two phase aggregates, the mathematical framework cannot be simply extended it breaks down as the system becomes mathematically overdetermined. Further work is required to solve this problem. If the second phase is insoluble, the mathematics can, though, be extended successfully, paving the way for models of diffusion creep with insoluble second phase particles.

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Periodical:

Materials Science Forum (Volumes 715-716)

Pages:

983-987

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.715-716.983

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Online since:

April 2012

Authors:

John Wheeler, J.M. Ford

Keywords:

Diffusion Creep, Multiphase Creep, Rheology

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