Modelling steady state deformation of fee metals by non-equilibrium thermodynamics

Huang, M. and Del Castillo, P. E.J.Rivera Díaz and Van Der Zwaag, S. (2007) Modelling steady state deformation of fee metals by non-equilibrium thermodynamics. Materials Science and Technology, 23 (9). pp. 1105-1108. ISSN 0267-0836

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Abstract

The steady state of plastic deformation is modelled by non-equilibrium thermodynamics theory. Based on energy conservation and constant entropy requirements at the steady state, the saturation dislocation density p is found to be determined by ρ=λε̇/(bvc), where λ is a constant that depends on the material properties, ε̇ is the strain rate, b is the magnitude of Burgers vector and vc is the dislocation climb velocity along the dislocation line. Then, by employing the Taylor relation, the saturation flow stress is obtained. The model is applied to four pure fee single crystals under tensile testing and polycrystalline Al at steady state creep. The predictions are in good agreement with the experimental observations.

Item Type:
Journal Article
Journal or Publication Title:
Materials Science and Technology
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2210
Subjects:
ID Code:
146117
Deposited By:
Deposited On:
10 Aug 2020 14:35
Refereed?:
Yes
Published?:
Published
Last Modified:
23 Nov 2020 15:41