Article: Modelling phase transformations and material properties critical to the prediction of distortion during the heat treatment of steels Journal: International Journal of Microstructure and Materials Properties (IJMMP) 2009 Vol.4 No.2 pp.187 - 195 Abstract: This paper describes the recent development of models in JMatPro for the calculation of phase transformations and material properties that are critical to the prediction of distortion during the heat treatment of steels. The success of these models is based on the accurate description of all the major phase transformations taking place, including the formation of ferrite, pearlite, bainite and martensite, as well as the calculation of the properties of the different phases formed during the heat treatment process. One advantage of the current models is that they can be applied to many types of steels, including medium- to high-alloy types. A wide range of properties such as density, thermal expansion coefficient, thermal conductivity, strength and hardness can be calculated, all as a function of time, temperature and cooling rate, even for an arbitrary cooling profile. The material data calculated from JMatPro have been exported directly to Finite Element (FE)/Finite Difference(FD)-based packages for forging/deformation simulation. Inderscience Publishers - linking academia, business and industry through research

Title: Modelling phase transformations and material properties critical to the prediction of distortion during the heat treatment of steels

Authors: Zhanli Guo, Nigel Saunders, Peter Miodownik, Jean-Philippe Schille

Addresses: Sente Software Ltd., Surrey Technology Centre, Guildford GU2 7YG, UK. ' Sente Software Ltd., Surrey Technology Centre, Guildford GU2 7YG, UK. ' Sente Software Ltd., Surrey Technology Centre, Guildford GU2 7YG, UK. ' Sente Software Ltd., Surrey Technology Centre, Guildford GU2 7YG, UK

Abstract: This paper describes the recent development of models in JMatPro for the calculation of phase transformations and material properties that are critical to the prediction of distortion during the heat treatment of steels. The success of these models is based on the accurate description of all the major phase transformations taking place, including the formation of ferrite, pearlite, bainite and martensite, as well as the calculation of the properties of the different phases formed during the heat treatment process. One advantage of the current models is that they can be applied to many types of steels, including medium- to high-alloy types. A wide range of properties such as density, thermal expansion coefficient, thermal conductivity, strength and hardness can be calculated, all as a function of time, temperature and cooling rate, even for an arbitrary cooling profile. The material data calculated from JMatPro have been exported directly to Finite Element (FE)/Finite Difference(FD)-based packages for forging/deformation simulation.

Keywords: materials properties; modelling; distortion; TTT diagram; Jominy hardenability; heat treatment; phase transformations; steel; forging; deformation; JMatPro; simulation; finite element method; FEM; finite difference method.

DOI: 10.1504/IJMMP.2009.028632

International Journal of Microstructure and Materials Properties, 2009 Vol.4 No.2, pp.187 - 195

Published online: 21 Sep 2009 *

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Title: Modelling phase transformations and material properties critical to the prediction of distortion during the heat treatment of steels

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