Capacidad de predicción de esfuerzos de conformado de materiales metálicos. Aplicación a la aleación Ti-6Al-4V

Rieiro, Ignacio; Martínez, Alberto; Carsí, Manuel

doi:10.3989/revmetalm.1998.v34.i4.800

Cited by 1 publication

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“…Históricamente, la modelización de la deformación en caliente se ha realizado empleando ecuaciones constitutivas como la ley potencial [1] o la ecuación de Garofalo [2][3][4] , que en definitiva son ecuaciones algebraicas que generalmente se han asociado al estado estacionario para la deformación. En contraste, en las últimas tres décadas se han desarrollado diferentes modelos diferenciales o dinámicos que consideran condiciones transitorias y estacionarias para la deformación.…”

Section: Introductionunclassified

Un nuevo modelo fenomenológico y diferencial para predecir la respuesta mecánica de materiales metálicos policristalinos sometidos a deformación en caliente

Castellanos¹,

Múñoz²,

Gutiérrez³

et al. 2012

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This paper presents a new phenomenological and differential model (that use differential equations) to predict the flow stress of a metallic polycrystalline material under hot working. The model, called MCC, depends on six parameters and uses two internal variables to consider the strain hardening, dynamic recovery and dynamic recrystallization processes that occur under hot working. The experimental validation of the MCC model has been carried out by means of stress-strain curves from torsion tests at high temperature (900 ºC a 1200 ºC) and moderate high strain rate (0.005 s -1 to 5 s -1 ) in a high nitrogen steel. The results reveal the very good agreement between experimental and predicted stresses. Furthermore, the Garofalo a-parameter and the strain to reach 50 % of recrystallized volume fraction have been employed as a control check being a first step to the physical interpretation of variables and parameters of the MCC model.

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