{"title":"Effect of V on microstructure and properties of Fe1.25CoNiAlMn0.21Vx magnetic high-entropy alloys","authors":"","doi":"10.1016/j.matchar.2024.114330","DOIUrl":null,"url":null,"abstract":"<div><p>The mechanism of performance enhancement of magnetic high-entropy alloys (MHEAs) under powder metallurgical processes is unknown, especially in terms of precipitated phases. This work reports the doping behavior of Fe<sub>1.25</sub>CoNiAlMn<sub>0.21</sub>V<sub>x</sub> (x = 0, 0.2 and 0.5) MHEAs, caused by the change of V content. Fe<sub>1.25</sub>CoNiAlMn<sub>0.21</sub>V<sub>x</sub> MHEAs were prepared by the mechanical alloying (MA) and the spark plasma sintering (SPS). Special attention was paid to the effect of the V content on the microstructure evolution, hardness, compressive strength, and magnetic properties of HEAs. Interestingly, the phase structure of these alloys remained relatively stable regardless of the variation in V content. The addition of a small amount of V helps to increase the saturation magnetization <em>Ms</em> of the alloy up to 117.2 emu/g and also promotes the solid-solution strengthening effect, with a maximum compression strength of 2724 MPa and a hardness of 531 HV. The excess V atoms could not completely enter the FCC phase to form a solid solution, but would instead and form a tough and brittle phase, reducing the mechanical properties of the alloy.</p></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":null,"pages":null},"PeriodicalIF":4.8000,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Characterization","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1044580324007113","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CHARACTERIZATION & TESTING","Score":null,"Total":0}
引用次数: 0
Abstract
The mechanism of performance enhancement of magnetic high-entropy alloys (MHEAs) under powder metallurgical processes is unknown, especially in terms of precipitated phases. This work reports the doping behavior of Fe1.25CoNiAlMn0.21Vx (x = 0, 0.2 and 0.5) MHEAs, caused by the change of V content. Fe1.25CoNiAlMn0.21Vx MHEAs were prepared by the mechanical alloying (MA) and the spark plasma sintering (SPS). Special attention was paid to the effect of the V content on the microstructure evolution, hardness, compressive strength, and magnetic properties of HEAs. Interestingly, the phase structure of these alloys remained relatively stable regardless of the variation in V content. The addition of a small amount of V helps to increase the saturation magnetization Ms of the alloy up to 117.2 emu/g and also promotes the solid-solution strengthening effect, with a maximum compression strength of 2724 MPa and a hardness of 531 HV. The excess V atoms could not completely enter the FCC phase to form a solid solution, but would instead and form a tough and brittle phase, reducing the mechanical properties of the alloy.
期刊介绍:
Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials.
The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal.
The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include:
Metals & Alloys
Ceramics
Nanomaterials
Biomedical materials
Optical materials
Composites
Natural Materials.