Stress-assisted martensitic transformations in steels : A 3-D phase-field study
2013 (English)In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 61, no 7, 2595--2606 p.Article in journal (Refereed) Published
A 3D elastoplastic phase-field model is developed for modeling, using Finite Element Method (FEM), the stress-assisted martensitic transformation by considering plastic deformation as well as anisotropic elastic properties of steels. Phase-field simulations in 3D are performed by considering different loading conditions on a single crystal of austenite in order to observe the microstructure evolution. The thermodynamic parameters corresponding to an Fe – 0.3%C steel as well as the physical parameters corresponding to commercial steels, acquired from experimental results, are considered as the input data for the simulations. The simulation results clearly show the well-known Magee effect and Greenwood-Johnson effect. The results also show that even though the applied stresses are below the yield limit of the material, plastic deformation initiates due to the martensitic transformation,viz. the well known TRIP (transformation induced plasticity) phenomenon. Finally it is concluded that the loading conditions, TRIP phenomenon as well as the autocatalysis play a major role in the stress-assisted martensitic microstructure evolution.
Place, publisher, year, edition, pages
2013. Vol. 61, no 7, 2595--2606 p.
Phase-field method, Martensitic transformation, Stress-induced, Microstructures, Steels
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-95305DOI: 10.1016/j.actamat.2013.01.039ISI: 000317161800028ScopusID: 2-s2.0-84875209312OAI: oai:DiVA.org:kth-95305DiVA: diva2:527634
Updated from in press to published. QC 201306252012-05-212012-05-212013-06-25Bibliographically approved