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dc.contributor.authorIvaniski, Thiago Marquespt_BR
dc.contributor.authorSouza, Tomaz Fantin dept_BR
dc.contributor.authorEpp, Jérémypt_BR
dc.contributor.authorRocha, Alexandre da Silvapt_BR
dc.date.accessioned2021-04-06T04:20:00Zpt_BR
dc.date.issued2020pt_BR
dc.identifier.issn1516-1439pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/219492pt_BR
dc.description.abstractIt is well recognized the importance of the rheological characterization for the development of the steel in thermomechanical treatments, especially for the mechanical properties improvement of bainitic steels in subsequent hot forging optimization. Therefore, the plastic strain behaviour of a low carbon high silicon bainitic steel was studied through isothermal compression tests using a thermomechanical simulator at temperatures of 1123 K – 1423 K and strain rates of 0.1 – 5 s-1. Arrhenius equation was used to obtain the constitutive constants, which represents the material behaviour of flow stress in high temperature. Besides, work hardening, dynamic recovery, and the JMAK model in the dynamic recrystallization (DRX) of the steel parameters were determined. The second part of this research compared two proposed modified models from the literature, which showed the differences in modelled flow curves behaviour when they are applied for high strain levels. The flow curves were modelled in high strain levels for further implementation in numerical simulation, thus allowing an adjustment of parameters in hot forming processes for this bainitic steel. The proposed models presented an agreement with experimental values. However, only the Avrami equation to DRX showed the dynamic recovery mechanism in high strain levels, which has represented physical behaviour during the thermomechanical process.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofMaterials research : ibero-american journal of materials. São Carlos, SP. Vol. 23, n. 5 (2020), e20200264, 10 p.pt_BR
dc.rightsOpen Accessen
dc.subjectFlow curves modellingen
dc.subjectAçopt_BR
dc.subjectDynamic revorery and dynamic recrystallization kineticsen
dc.subjectSimulação numéricapt_BR
dc.subjectForjamento a quentept_BR
dc.subjectBainitic steelsen
dc.titleConstitutive modelling of high temperature flow behaviour for a low carbon high silicon bainitic steelpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001123493pt_BR
dc.type.originNacionalpt_BR


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