Explaining the drop of work-hardening rate and limitation of transformation-induced plasticity effect in metastable stainless steels during tensile deformation
Mohammad Javad Sohrabi, Hamed Mirzadeh, Saeed Sadeghpour, R. Mahmudi
Abstract
While the occurrence of the transformation-induced plasticity effect in metastable austenitic stainless steels has been adequately explained, the reason behind the fall of work-hardening rate after the maximum value remains largely unknown. In the present work, via extensive work-hardening analysis and examination of the mechanical properties and strengthening mechanisms by the Hollomon analysis, Hall-Petch law, and rule-of-mixtures, it is revealed that the yielding of the deformation-induced martensite leads to the drop of work-hardening rate and limits the strengthening effect of strain-induced martensitic transformation and tensile ductility.
Topics & Concepts
Materials scienceWork hardeningPlasticityAusteniteDiffusionless transformationMetallurgyUltimate tensile strengthDrop (telecommunication)Austenitic stainless steelHardening (computing)Strain hardening exponentMartensiteComposite materialMicrostructureTelecommunicationsLayer (electronics)CorrosionComputer scienceMicrostructure and Mechanical Properties of SteelsHydrogen embrittlement and corrosion behaviors in metalsWelding Techniques and Residual Stresses