TY - JOUR

T1 - Modelling steady state deformation of fee metals by non-equilibrium thermodynamics

AU - Huang, M.

AU - Del Castillo, P. E.J.Rivera Díaz

AU - Van Der Zwaag, S.

PY - 2007/9/1

Y1 - 2007/9/1

N2 - 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.

AB - 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.

KW - Dislocation density

KW - Saturation stress

KW - Steady state deformation

KW - Thermodynamics

U2 - 10.1179/174328407X226527

DO - 10.1179/174328407X226527

M3 - Journal article

AN - SCOPUS:35148851880

VL - 23

SP - 1105

EP - 1108

JO - Materials Science and Technology

JF - Materials Science and Technology

SN - 0267-0836

IS - 9

ER -