Open AccessIncremental Micromechanical Modelling of the Transformation Induced Plasticity
Author(s) -
Jean-Marc Diani,
M. Berveiller,
H. Sabar
Publication year - 1996
Publication title -
journal de physique iv (proceedings)
Language(s) - English
Resource type - Journals
eISSN - 1764-7177
pISSN - 1155-4339
DOI - 10.1051/jp4:1996140
Subject(s) - plasticity , martensite , austenite , materials science , microscopic scale , transformation (genetics) , scale (ratio) , kinematics , macroscopic scale , mechanics , flow (mathematics) , orientation (vector space) , micromechanics , metallurgy , composite material , microstructure , geometry , classical mechanics , mathematics , physics , chemistry , composite number , gene , quantum mechanics , optics , biochemistry
Classical plasticity (dislocation motion) coupled to solid-solid phase transformation (lattice changes) is the primary cause of the special behaviour of TRIP (TRansformation Induced Plasticity) steels. Internal stresses associated with the phase change induces in fact a large additional plastic flow inside austenite and martensite. We propose a kinematic description of such a phenomenon based on a local decomposition of strain rate into an elastoplastic part and a given lattice inelastic strain rate field. Based on this description and using usual Green functions method, a concentration tensor for the total strain rate field is obtained. The self consistent approximation allows to determine the behavior of the equivalent material and the équivalent transformation strain rate
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