The role of interstitial carbon atoms on the strain-hardening rate of twinning-induced plasticity steels. (15th March 2020)

• Record Type: Journal Article
• Authors: Luo, Z.C.; Huang, M.X.
• Is Part Of: Scripta materialia. Number 178(2020)
• Page Start: 264
• Page End: 268
• Publication Date: 2020-03-15
• Subjects: TWIP steel -- Strain-hardening -- Dislocation density -- Carbon-dislocation interaction -- 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.2019.11.047
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Synchrotron X-ray diffraction was applied to measure the dislocation density of two twinning-induced plasticity (TWIP) steels with different carbon content but comparable stacking fault energy (SFE). We found that the dislocation density of the carbon-alloyed TWIP is much higher than that of the carbon-free TWIP steel, though these two steels possess similar twin volume fraction. It indicates that the excellent tensile and strain-hardening properties of the carbon-alloyed TWIP steels are mainly caused by the high dislocation density induced by the carbon-dislocation interaction. Carbon-free TWIP steels are conventional low SFE fcc alloys similar to 316L stainless steel. Graphical abstract: Image, graphical abstract