Correlation of microdistortions with misfit volumes in High Entropy Alloys. (15th July 2019)

• Record Type: Journal Article
• Authors: Nöhring, Wolfram Georg; Curtin, W.A.
• Is Part Of: Scripta materialia. Number 168(2019)
• Page Start: 119
• Page End: 123
• Publication Date: 2019-07-15
• Subjects: Random alloys -- Solute-solute interactions -- Short-range order -- Modeling; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.04.012
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The yield strengths of High Entropy Alloys have recently been correlated with measured or computed picometer-scale atomic distortions. Here, the root mean square microdistortion in a multicomponent alloy is shown to be nearly proportional to the misfit-volume parameter that enters into a predictive model of solute strengthening. Analysis of two model ternary alloy families, face-centered cubic Cr-Fe-Ni and body-centered cubic Nb-Mo-V, demonstrates the correlation over a wide composition space. The reported correlation of yield strength with microdistortion is thus a consequence of the correlation between microdistortion and misfit parameter and the derived dependence of yield strength on the misfit parameter. Graphical Abstract: Unlabelled Image