Impact of interstitial carbon on self-diffusion in CoCrFeMnNi high entropy alloys. (November 2020)

• Record Type: Journal Article
• Authors: Lukianova, O.A.; Rao, Z.; Kulitckii, V.; Li, Z.; Wilde, G.; Divinski, S.V.
• Is Part Of: Scripta materialia. Number 188(2020)
• Page Start: 264
• Page End: 268
• Publication Date: 2020-11
• Subjects: Tracer diffusion -- High-entropy alloy -- Carbon solubility; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.07.044
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Tracer diffusion of the matrix elements in CoCrFeNiMn-based high-entropy alloys with 0.2, 0.5 and 0.8 at.% carbon is measured at 1373 K. The diffusion coefficients are found to depend non-monotonously on the carbon content. The diffusion retardation in low-C alloys is discussed in terms of the impact of interstitially-dissolved carbon on the vacancy concentration and the migration barriers in the alloy. In high-C alloys, formation of carbides alternates the observed trends, most probably by increasing the total vacancy concentration. Graphical abstract: Image, graphical abstract