Describing the deformation behaviour of TRIP and dual phase steels employing an irreversible thermodynamics formulation

• Published in: Materials science and technology Vol. 31; no. 13; pp. 1658 - 1663
• Main Authors: Li, S., Honarmandi, P., Arróyave, R., Rivera-Diaz-del-Castillo, P. E. J.
• Format: Journal Article
• Language: English
• Published: London, England Taylor & Francis 01.10.2015; SAGE Publications
• Subjects: Alloys; Bainitic ferrite; Dislocation density; Dissipation; Dual phase steels; Irreversible thermodynamics; Materials science; Mathematical models; Mechanically induced martensitic transformation; Plastic deformation; Thermodynamics; Transformations; TRIP steel; TRIP steels; Mechanically induced martensitic transformation; Bainitic ferrite; TRIP steel; Irreversible thermodynamics
• ISSN: 0267-0836; 1743-2847
• DOI: 10.1179/1743284715Y.0000000076

The plastic deformation of multiphase steels is described employing an irreversible thermodynamics formulation. Transformation induced plasticity and dual phase grades are described within a single theoretical framework. The approach describes the plastic deformation of each individual phase in terms of the evolution of dislocation density, subject to dissipative mechanisms associated to dislocation generation, glide and annihilation. The collective behaviour of the ensemble of phases into a single microstructure is ensured through a self-consistent approach based on the iso-work approximation. The parameterised model shows very good agreement with several alloys studied experimentally and available in the literature.