Architectured multi-metal CoCrFeMnNi-Inconel 718 lamellar composite by high-pressure torsion. (1st April 2021)

• Record Type: Journal Article
• Authors: Karthik, G.M.; Asghari-Rad, Peyman; Sathiyamoorthi, Praveen; Zargaran, Alireza; Kim, Eun Seong; Kim, Taek Soo; Kim, Hyoung Seop
• Is Part Of: Scripta materialia. Number 195(2021)
• Publication Date: 2021-04-01
• Subjects: Multi-materials -- Composites -- High-pressure torsion -- Powder metallurgy -- High entropy alloy; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2021.113722
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Multi-metal composites have gained much interest in recent years to explore the unfilled space of the strength-elongation window. However, producing these composites is challenging and is limited to a few material combinations because most processing techniques involve melting/solidification and high-temperatures. This work demonstrates a new powder metallurgy-based approach to produce these composites using high-pressure torsion. Lamellar nano-crystalline composite with high entropy alloy (CoCrFeMnFe) matrix and uniformly distributed nickel-base superalloy (Inconel 718) reinforcement are realized after high-pressure torsion. The current approach has resulted in an excellent metallurgical bonded interface with an ultra-fine grain size in both the matrix and reinforcement. The samples showed an exceptional synergy of high yield strength ~900 MPa and elongation ~40%, overcoming the perennial challenge in multi-metal composites. The current approach is versatile and can open up a horizon of multi-material combinations with a synergy of strength and ductility. Graphical abstract: Image, graphical abstract