1.0 GPa low carbon medium Mn heavy steel plate with excellent ductility. Issue 17 (22nd November 2019)

• Record Type: Journal Article
• Authors: Chen, Jun; Ren, Jia-kuan; Liu, Zhen-yu; Wang, Guo-dong
• Is Part Of: Materials science and technology. Volume 35:Issue 17(2019)
• Page Start: 2143
• Page End: 2149
• Publication Date: 2019-11-22
• Subjects: Medium Mn steel -- retained austenite -- precipitation -- high strength; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2018.1558718
• Languages: English
• ISSNs: 0267-0836

Abstract

ABSTRACT: A vanadium-bearing medium Mn heavy steel plate was designed, and the yield strength reaches around 1.0 GPa and the total elongation reaches around 18% after the annealing treatments. Meanwhile, the steel also possesses relatively good cryogenic impact toughness. Although the dislocation density of ∼2.65 × 10 14 m −2 in the hot-rolled steel decreases to ∼1.13 × 10 14 m −2 in both annealed steels and the volume fractions of retained austenite reach ∼7.9% and ∼13.5% for the steels annealed at 620°C for 1 and 2 h, there is no or small decrease in yield strength owing to numerous nanometer-sized carbides precipitated in martensite matrix. This paper is part of a Thematic Issue on Medium Manganese Steels.