Strengthening of high entropy alloys by dilute solute additions: CoCrFeNiAlx and CoCrFeNiMnAlx alloys. (September 2017)

• Record Type: Journal Article
• Authors: Varvenne, Céline; Curtin, William A.
• Is Part Of: Scripta materialia. Number 138(2017)
• Page Start: 92
• Page End: 95
• Publication Date: 2017-09
• Subjects: High entropy alloys -- Mechanical properties -- Solution strengthening -- Modeling; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.05.035
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: A theory to predict the initial flow stress of an arbitrary N -component fcc random alloy is extended to predict the additional strengthening when a dilute concentration of a substitutional element is introduced. Assuming properties for the N -component alloy to be established, the theory requires only information on the elastic and lattice constants of the new N + 1-alloy, and makes a parameter-free prediction for the strength-increment due to the added N + 1st element. The theory is applied to the CoCrFeNiAl x and CoCrFeNiMnAl x systems, achieving good agreement with experiments. The theory thus serves as a valuable tool for guiding design of new fcc random alloys. Graphical abstract: