A medium-C martensite steel with 2.6 GPa tensile strength and large ductility. (15th April 2023)

• Record Type: Journal Article
• Authors: Junkui, Li; Zhinan, Yang; Hua, Ma; Chen, Chen; Fucheng, Zhang
• Is Part Of: Scripta materialia. Number 228(2023)
• Publication Date: 2023-04-15
• Subjects: Martensitic steel -- Dislocation -- Carbides -- Tensile properties; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2023.115327
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Nanoscale lath martensite with high density dislocations and fine V carbides embedded in heterogeneous lamellar structure was produced in Medium-C (0.46%) martensitic steel through multistage rolling process followed by subsequent oil quenching and low-temperature tempering. Tensile properties show the yield strength, ultimate tensile strength and uniform elongation are up to 1809 MPa, 2590 MPa and 12.6%, respectively. The excellent combination of strength and ductility is comparable and even superior to other high-strength high-ductility metallic materials. In addition, the underlying mechanisms were briefly discussed. Graphical abstract: Image, graphical abstract