Semisolid deformation behavior and processing of CoCrCuxFeNi high-entropy alloys. (November 2022)

• Record Type: Journal Article
• Authors: Chaussê de Freitas, Caio; Caram, Rubens; Campo, Kaio Niitsu
• Is Part Of: Intermetallics. Volume 150(2022)
• Publication Date: 2022-11
• Subjects: Semisolid processing -- High-entropy alloys -- Semisolid deformation behavior -- Microstructure -- Mechanical properties; Intermetallic compounds -- Metallography -- Periodicals; Metallic glasses -- Periodicals; Composés intermétalliques -- Métallographie -- Périodiques; 669.94
• DOI: 10.1016/j.intermet.2022.107682
• Languages: English
• ISSNs: 0966-9795

Abstract

Abstract: In this study, the semisolid deformability and processability of three CoCrCux FeNi high-entropy alloys (x = 1, 2, and 3) were evaluated. At 1175 °C, the Cu content had a major influence on the semisolid deformation due to its control of the liquid fraction. The semisolid alloys displayed a typical pseudoplastic rheological behavior. Only the CoCrCu3 FeNi alloy filled the die completely during thixoforming. The Vickers hardness decreased with increasing Cu content due to the different hardness values of the constituent FCC phases. The compression test results showed that the thixoformed CoCrCu3 FeNi had good plasticity and a yield stress of 310 MPa. Thus, semisolid processing can be an alternative route for manufacturing components made of high-entropy alloys. Graphical abstract: Image 1 Highlights: Semisolid compression properties were evaluated. The Cu content had a strong influence on the apparent viscosity. The CoCrCu3 FeNi alloy was successfully thixoformed.