Corrosion-resistant high entropy alloy with high strength and ductility. (June 2019)

• Record Type: Journal Article
• Authors: Nene, S.S.; Frank, M.; Liu, K.; Sinha, S.; Mishra, R.S.; McWilliams, B.A.; Cho, K.C.
• Is Part Of: Scripta materialia. Number 166(2019)
• Page Start: 168
• Page End: 172
• Publication Date: 2019-06
• Subjects: High entropy alloy (HEA) -- Cu-HEA -- Corrosion resistance -- TRIP stress; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.03.028
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: High-strength materials lack a synergistic combination of mechanical properties and corrosion resistance desired for most structural applications. Phase and grain boundary architecturing is done in the material to attain balance in these properties. A friction stir processed Fe38.5 Mn20 Co20 Cr15 Si5 Cu1.5 (Cu-HEA) exhibited excellent mechanical properties and high corrosion resistance in synergy. The excellent mechanical properties were attributed to the controlled transformation of ultrafine γ matrix and ε twinning; whereas good corrosion resistance was due to homogenized fine grained γ microstructure. In short, Cu-HEA design opens a new pathway towards realizing strong and ductile alloys with tunable corrosion resistance by engineering matrix metastability. Graphical abstract: Unlabelled Image