Couplings between plasticity and martensitic phase transformation: overall behavior of polycrystalline TRIP steels

Autor:	Mohammed Cherkaoui, Marcel Berveiller, X. Lemoine
Rok vydání:	2000
Předmět:	Austenite Materials science Mechanical Engineering Metallurgy Constitutive equation Nucleation Thermodynamics Plasticity Simple shear Condensed Matter::Materials Science Mechanics of Materials Diffusionless transformation Martensite General Materials Science Ductility
Zdroj:	International Journal of Plasticity. 16:1215-1241
ISSN:	0749-6419
DOI:	10.1016/s0749-6419(00)00008-5
Popis:	Several couplings between plasticity and martensitic phase transformation are at the origin of remarkable properties of ductility and toughness in the case of TRIP steels. A micromechanical model is developed to predict the conditions of nucleation and growth of a martensitic microdomain inside an inhomogeneous plastic strain field. More explicit relations are developed in the case of a simple shear test where a heterogeneous plastic strain field leads to a significant decrease of the critical stress for martensitic transformation. The obtained results are combined with a kinetics and kinematics studies to derive the constitutive equation of an austenitic single crystal from which the overall behavior of a polycrystalline steel is deduced using the self-consistent scale transition method. Comparison with experimental data shows a good agreement.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5998b404416ccefca52e988565cd2347 https://doi.org/10.1016/s0749-6419(00)00008-5 Zobrazit plný text záznamu Full Text from ScienceDirect