Phase engineering in nanocrystalline high-entropy alloy composites to achieve strength-plasticity synergy. (May 2023)

• Record Type: Journal Article
• Authors: Wang, Junjie; Zhao, Ning; Yan, Mengyang; Kou, Zongde; Fu, Shu; Wu, Shangshu; Liu, Sinan; Lan, Si; You, Zesheng; Wang, Di; Hahn, Horst; Feng, Tao
• Is Part Of: Scripta materialia. Number 229(2023)
• Publication Date: 2023-05
• Subjects: Phase engineering -- Nanocrystalline high-entropy alloy composites -- Laser-inert gas condensation -- Diffusion-induced phase transition -- Tensile property; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2023.115374
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: In this work, the strength-plasticity synergy of Al/CoCrFeNi nanocrystalline high-entropy alloy composite (nc-HEAC) prepared by laser-inert gas condensation is achieved via nanoscale diffusion induced phase transition (DIPT) process. The yield strength and elongation of the 16%-Al/CoCrFeNi nc-HEAC annealed at 900 °C were 1338 MPa and 12.1%, showing the combination of outstanding strength and considerable ductility. The synergy of multiple strengthening mechanisms were revealed. Driving the phase transition of nanocrystalline dual-phase composites by thermal diffusion establishes a novel phase engineering design strategy for high-performance alloys. Graphical abstract: Image, graphical abstract