Aoxiang Li, Kaiwen Kang, Borui Zhang, Jinshan Zhang, Di Huang, Mingkun Xu, Saike Liu, Yiteng Jiang, Gong Li
{"title":"Development and characterization of CoCrFeNi high entropy alloy composites reinforced by B4C ceramic particles","authors":"Aoxiang Li, Kaiwen Kang, Borui Zhang, Jinshan Zhang, Di Huang, Mingkun Xu, Saike Liu, Yiteng Jiang, Gong Li","doi":"10.1016/j.intermet.2025.108740","DOIUrl":null,"url":null,"abstract":"<div><div>To address the challenge of the low yield strength of single-phase FCC high-entropy alloys (HEAs), developing high-performance HEA composites has emerged as a promising strategy for enhancing the mechanical properties of HEAs. In this study, we propose a novel CoCrFeNi-based HEA composites incorporating a small amount of B<sub>4</sub>C ceramic particles. The influence of varying B<sub>4</sub>C ceramic particle content on the microstructure evolution and mechanical properties of CoCrFeNi(B<sub>4</sub>C)<sub>x</sub> HEAs was systematically investigated. Microstructure analysis reveals that increasing the B<sub>4</sub>C ceramic particles promoted the precipitation of M<sub>7</sub>C<sub>3</sub> carbides at grain boundaries, resulting in a dendritic microstructure. Mechanical testing demonstrated a significant improvement in yield strength and Vickers hardness, attributed to the synergistic strengthening of solution and precipitation strengthening. Furthermore, the microhardness of the M<sub>7</sub>C<sub>3</sub> carbides increased from 12.1 GPa to 15.5 GPa with higher B<sub>4</sub>C ceramic particle content, highlighting the contribution of these carbides to the overall hardness of the composite. This design strategy exploits the synergy between the metal matrix and ceramic reinforcements, improving mechanical performance and offering new possibilities for the development of advanced materials for demanding industrial applications.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"181 ","pages":"Article 108740"},"PeriodicalIF":4.3000,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Intermetallics","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0966979525001050","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
To address the challenge of the low yield strength of single-phase FCC high-entropy alloys (HEAs), developing high-performance HEA composites has emerged as a promising strategy for enhancing the mechanical properties of HEAs. In this study, we propose a novel CoCrFeNi-based HEA composites incorporating a small amount of B4C ceramic particles. The influence of varying B4C ceramic particle content on the microstructure evolution and mechanical properties of CoCrFeNi(B4C)x HEAs was systematically investigated. Microstructure analysis reveals that increasing the B4C ceramic particles promoted the precipitation of M7C3 carbides at grain boundaries, resulting in a dendritic microstructure. Mechanical testing demonstrated a significant improvement in yield strength and Vickers hardness, attributed to the synergistic strengthening of solution and precipitation strengthening. Furthermore, the microhardness of the M7C3 carbides increased from 12.1 GPa to 15.5 GPa with higher B4C ceramic particle content, highlighting the contribution of these carbides to the overall hardness of the composite. This design strategy exploits the synergy between the metal matrix and ceramic reinforcements, improving mechanical performance and offering new possibilities for the development of advanced materials for demanding industrial applications.
期刊介绍:
This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys.
The journal reports the science and engineering of metallic materials in the following aspects:
Theories and experiments which address the relationship between property and structure in all length scales.
Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations.
Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties.
Technological applications resulting from the understanding of property-structure relationship in materials.
Novel and cutting-edge results warranting rapid communication.
The journal also publishes special issues on selected topics and overviews by invitation only.