The determining role of reversed austenite in enhancing toughness of a novel ultra-low carbon medium manganese high strength steel. (15th July 2015)

• Record Type: Journal Article
• Authors: Hu, Jun; Du, Lin-Xiu; Sun, Guo-Sheng; Xie, Hui; Misra, R.D.K.
• Is Part Of: Scripta materialia. Volume 104(2015)
• Page Start: 87
• Page End: 90
• Publication Date: 2015-07-15
• Subjects: Medium manganese steel -- Reversed transformation austenite -- Toughness -- Phase stability; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.04.009
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : The ultra-low carbon medium Mn steel was subjected to quenching and intercritical tempering process. The 650 °C tempering route led to 15% volume fraction of austenite with combination of high yield strength of 650 MPa, low yield ratio of 0.86, and excellent elongation of ∼31%. The impact energy at −20 °C was enhanced more than twenty times from 10 J to 213 J. The formation of reversed transformation austenite during the intercritical tempering process contributed to the observed superior mechanical properties.