Corrosion-resistant high entropy alloy with high strength and ductility

By S. Nene, M. Frank, K. Liu, S. Sinha, Rajiv S. Mishra, B. McWilliams, Kyu C. Cho. Scripta Materialia, 2019

223 citations recorded by the source corpus.

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 Fe38.5Mn20Co20Cr15Si5Cu1.5 (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 e 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.

Subfields: Aerospace Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/cb856cc5bf876384744e4e4060b2d5a095bef66c

Citations in the corpus

• Clarifying the four core effects of high-entropy materials (2024, unknown): “…from corrosion, oxidation and wear-and-tear; as thermal or diffusion barriers to inhibit heat transfer or atomic-molecular diffusion; as cutting tools to increase wear resistance and lifetime 47–52 ; and as catalysts for waste degradation and for water splitting to generate hydrogen 53,54 .”