Dislocation Link Length Models for Creep and Strain Hardening

Öström, Peter; Lagneborg, R.

doi:10.1016/b978-1-4832-8412-5.50053-9

Cited by 5 publications

References 3 publications

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On dislocation link length statistics for constant strain rate deformation

Shi

Northwood

1993

Phys. Stat. Sol. (a)

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A model based on the dislocation link length statistics of the three‐dimensional dislocation network structure is used to analyse high‐temperature constant strain rate deformation of crystalline materials. In particular, the strain rate change during steady‐state constant strain rate deformation is studied in some detail. It is shown that the corresponding change in the flow stress, Δσ, associated with an instantaneous change, Δσ, in the imposed strain rate of an otherwise constant strain rate, \documentclass{article}\pagestyle{empty}\begin{document}$ \dot \varepsilon $\end{document} , at a given temperature follows the Haasen relation in that the (Δσ/Δ ln \documentclass{article}\pagestyle{empty}\begin{document}$ \dot \varepsilon $\end{document} ) versus σ plot is linear with the slope being equal to the strain rate sensitivity, m (Cottrell‐Stokes law). The material parameters are also examined in the light of the model results and previous mechanical measurements. It is shown that the model produces constant strain rate sensitivity values for constant strain rate deformation. Agreement between model predictions and reported data is reasonably good.

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On dislocation link length statistics for constant strain rate deformation

Shi

Northwood

1993

Phys. Stat. Sol. (a)

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Kinetics of Plastic Deformation

Ray

2018

Kinetics of Metallurgical Processes

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A model for dislocation creep

Gondi

Sili

1991

Il Nuovo Cimento D

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Summary. --Experimental results of dynamic modulus and internal friction, measured directly during creep deformation, and back-stress data from dip test measurements are considered for an explanation of the power law of creep. The explanation is essentially based on the assumption that stationary creep depends on dislocations in the subgrain interior with zones of accumulation near to the subboundaries which are conditioning for the emission processes. The power law is related to the tendency, of the dislocation segments, to approach to the lengths of superior backstress limit, the more the higher the applied stress.PACS 62.20 -Mechanics and rheology of solids.

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Dislocation Link Length Models for Creep and Strain Hardening

Cited by 5 publications

References 3 publications

On dislocation link length statistics for constant strain rate deformation

On dislocation link length statistics for constant strain rate deformation

Kinetics of Plastic Deformation

A model for dislocation creep

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