{"title":"Enhanced mechanical properties of NiCoCrCuAl high entropy alloys with dual-phase microstructure","authors":"Fa-Chang Zhao , Xing-Ming Zhao , Rong-Da Zhao , Fu-Fa Wu , Shun-Hua Chen","doi":"10.1016/j.intermet.2024.108627","DOIUrl":null,"url":null,"abstract":"<div><div>The correspondence between the mechanical properties and the microstructure of NiCoCrCuAl series high-entropy alloys (HEAs) was investigated by the adjustment of face-centered cubic (FCC) and body-centered cubic (BCC) phase proportions. The results show that the NiCoCrCuAl HEAs changed from FCC to BCC phase, with the volume fraction of body-centered cubic (BCC) phase increasing from 14 % to 93 %. The microstructure of the alloys evolves from typical dendritic structure to fine equiaxed grains. The hardness of 518 Hv and the ultimate tensile strength of 1092 MPa were achieved in the NiCoCrCuAl series HEAs. The phase composition and microstructure were comprehensively analyzed based on the mixing entropy and enthalpy, atomic size, valence electron concentration, and electronegativity. The mechanical properties were analyzed from the perspective of mixture of FCC and BCC phases.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"178 ","pages":"Article 108627"},"PeriodicalIF":4.8000,"publicationDate":"2025-01-03","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/S0966979524004461","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
The correspondence between the mechanical properties and the microstructure of NiCoCrCuAl series high-entropy alloys (HEAs) was investigated by the adjustment of face-centered cubic (FCC) and body-centered cubic (BCC) phase proportions. The results show that the NiCoCrCuAl HEAs changed from FCC to BCC phase, with the volume fraction of body-centered cubic (BCC) phase increasing from 14 % to 93 %. The microstructure of the alloys evolves from typical dendritic structure to fine equiaxed grains. The hardness of 518 Hv and the ultimate tensile strength of 1092 MPa were achieved in the NiCoCrCuAl series HEAs. The phase composition and microstructure were comprehensively analyzed based on the mixing entropy and enthalpy, atomic size, valence electron concentration, and electronegativity. The mechanical properties were analyzed from the perspective of mixture of FCC and BCC phases.
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.
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