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- W1998391490 abstract "The creep behaviour of 1CrMoV steel in the tempered bainitic condition at 823–838 K from three separate studies was examined. It was found that two regions of deformation exist: in that at high stresses (σ > 230 MPa) the stress exponent n is about 14 and the activation energy for creep is about 397 000 J mol−1; at low stresses (σ < 230 MPa) the stress exponent n is about 4 and the activation energy is about 210 000 J mol−1. Using the concept of friction stress σ0 a constitutive equation is derived which is in good agreement with the three sets of experimental data. The constitutive equation for creep deformation in 1CrMoV in the tempered bainitic condition at 823–838 K is given by ϵ̇ = ADVGbkTρ−ρ0G3.5 where Dv is the volume self-diffusion coefficient for iron, G the shear modulus, b the Burgers vector, k Boltzman's constant, σ the applied stress, A a constant and ε the minimum creep rate. The application of friction stress to the life assessment of engineering components is discussed. It is concluded that it is a useful parameter in assessing the microstructural damage that takes place during long-term creep. However, before it can be of use in the life assessment of components, new techniques (experimental or theoretical) of determining friction stress at low applied stresses are required." @default.
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- W1998391490 date "1982-07-01" @default.
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- W1998391490 title "A constitutive equation for creep deformation of 1CrMoV ferrritic steel at 823–838 K" @default.
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- W1998391490 doi "https://doi.org/10.1016/0025-5416(82)90111-2" @default.
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