Enhanced tensile properties of CrMnFeCoNi0.8 high entropy alloy with in-situ TiC particles. (September 2022)

• Record Type: Journal Article
• Authors: Huang, Sirui; Wu, Hao; Zhu, Heguo; Xie, Zonghan; Cheng, Jialin
• Is Part Of: Intermetallics. Volume 148(2022)
• Publication Date: 2022-09
• Subjects: A. high entropy alloys -- B. in-situ -- B. microstructure -- D. mechanical properties; Intermetallic compounds -- Metallography -- Periodicals; Metallic glasses -- Periodicals; Composés intermétalliques -- Métallographie -- Périodiques; 669.94
• DOI: 10.1016/j.intermet.2022.107639
• Languages: English
• ISSNs: 0966-9795

Abstract

Abstract: In-situ TiC particulate reinforced CrMnFeCoNi0.8 high entropy alloy (HEA) matrix composites were prepared by induction melting method. The effect of TiC content upon the microstructure and tensile properties of as-cast samples were analyzed and discussed. The HEA matrix has single-phase face-centered cubic (FCC) structure, determined by X-ray diffraction (XRD) pattern. Compared to the CrMnFeCoNi0.8 matrix, 7.5 vol%TiC/CrMnFeCoNi0.8 composite possessed remarkable yield strength (517.1 MPa vs 240.9 MPa), ultimate tensile strength (926.2 MPa vs 527.5 MPa) and excellent uniform elongation (38.0%). Strong dislocation interactions, load-bearing effect and Orowan mechanism afforded by in-situ TiC particles, together with solid-solution strengthening via C and Ti elements, are responsible for the strength enhancement. Highlights: TiC/CrMnFeCoNi0.8 composites were synthesized by vacuum induction melting. In-situ TiC/CrMnFeCoNi0.8 composites has a FCC base reinforced with TiC particles. 7.5% TiC/CrMnFeCoNi0.8 achieved the combination of tensile strength and ductility. Dislocations, load bearing and Solid-solution are key strengthening factors.