{"title":"Enhanced properties of Al0.3NbTiZrMox refractory high-entropy alloys achieved with a change in Mo content","authors":"","doi":"10.1016/j.intermet.2024.108418","DOIUrl":null,"url":null,"abstract":"<div><p>The present study investigated how the addition of Mo, within a carefully designed alloy composition, regulated the properties of Al<sub>0.3</sub>NbTiZrMo<sub>x</sub> refractory high-entropy alloys. A thorough analysis of the microstructure of the resultant alloys and comprehensive tests on hardness, friction, wear, and electrochemical corrosion were performed. Results revealed that Mo plays a crucial role in promoting the formation of a BCC + HCP phase and in refining the alloy's grain structure. In addition, increasing Mo content led to higher hardness and improved wear resistance, primarily driven by solution strengthening, dislocation strengthening, and fine crystal strengthening. At the same time, the increase in Mo content was greatly conducive to the improvement of corrosion resistance due to the increase in phase transformation, composition homogenization, grain refinement, and the presence of Mo-passivation film.</p></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":null,"pages":null},"PeriodicalIF":4.3000,"publicationDate":"2024-07-18","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/S0966979524002371","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}
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Abstract
The present study investigated how the addition of Mo, within a carefully designed alloy composition, regulated the properties of Al0.3NbTiZrMox refractory high-entropy alloys. A thorough analysis of the microstructure of the resultant alloys and comprehensive tests on hardness, friction, wear, and electrochemical corrosion were performed. Results revealed that Mo plays a crucial role in promoting the formation of a BCC + HCP phase and in refining the alloy's grain structure. In addition, increasing Mo content led to higher hardness and improved wear resistance, primarily driven by solution strengthening, dislocation strengthening, and fine crystal strengthening. At the same time, the increase in Mo content was greatly conducive to the improvement of corrosion resistance due to the increase in phase transformation, composition homogenization, grain refinement, and the presence of Mo-passivation film.
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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