Theory of designing the gradient microstructured metals for overcoming strength-ductility trade-off. (15th July 2020)

• Record Type: Journal Article
• Authors: Fan, Jitang; Zhu, Linli; Lu, Jian; Fu, Tao; Chen, Aiying
• Is Part Of: Scripta materialia. Number 184(2020)
• Page Start: 41
• Page End: 45
• Publication Date: 2020-07-15
• Subjects: Microstructure -- Metal -- Model -- Strength -- Ductility; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.03.045
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : Gradient microstructure design has been found to be an effective approach to significantly produce the utmost advanced structural metallic materials, which have a signature in mechanical characteristic of strength-ductility-hardenability combination. In this work, a physical theory and mechanism-based numerical model are developed for sophisticatedly designing the gradient microstructured metals. It considers the gradient distribution of grain size, twin, martensite and austenite in a metallic alloy. The numerical results are validated through experiments. The mechanical performance of high strength, large ductility and considerable hardenability is achieved and their trade-off is successfully overcome. Graphical abstract: Theory of designing the metals with a gradient microstructure involving grain size and volume fraction of austenite and martensite as well as twin space for overcoming strength-ductility trade-off with the mechanical performance of high strength, large ductility and considerable hardenability, which is validated by experiments. Image, graphical abstract