The respective hardening contributions of dislocations and twins to the flow stress of a twinning-induced plasticity steel. (February 2016)

• Record Type: Journal Article
• Authors: Liang, Z.Y.; Li, Y.Z.; Huang, M.X.
• Is Part Of: Scripta materialia. Volume 112(2016)
• Page Start: 28
• Page End: 31
• Publication Date: 2016-02
• Subjects: TWIP steel -- Twin -- Dislocation density -- Synchrotron X-ray diffraction; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.09.003
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Deformation twins in twinning-induced plasticity (TWIP) steels have been considered in the literature as the source of back stress and kinematic hardening, which contribute considerably to the flow stress. Nevertheless, it is demonstrated in the present work that the contribution of twins to the flow stress is limited. Instead, dislocations, via forest hardening, account for up to ~ 90% of the flow stress increment after yielding in the present TWIP steel. In other words, dislocation evolution dominates the work-hardening rate of TWIP steels. Graphical abstract: