Simulation of the hot flow behaviour of a médium carbón microalloyed steel. Part 3. Constitutive equations
Keywords:Modelling, Hot flow, Deformation, Constitutive equations, Microalloyed steel
According to the part 1 of this work the constitutive equations of the hot flow behaviour of a commercial microalloyed steel have been obtained. For this purpose, the uniaxial hot compression tests described in the part 2 were employed. Tests were carried out over a range of 5 orders of magnitude in strain rate and 300 °C of temperature. Experimental results are compared with the theoretical model introduced in the first part of this study. It is concluded that deviations between experimental and theoretical curves are lower than 10 %. It is shown that the classical hiperbolic sine constitutive equation described accurately the experimental behaviour provided that stresses are normalized by the Young's modulus and strain rates by the self-diffusion coefficient. An internal stress must also be introduced in the latter equation when the initial grain size is fine enough.
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How to Cite
Cabrera, J. M., Al Omar, A., & Prado, J. M. (1997). Simulation of the hot flow behaviour of a médium carbón microalloyed steel. Part 3. Constitutive equations. Revista De Metalurgia, 33(4), 215–228. https://doi.org/10.3989/revmetalm.1997.v33.i4.849
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