{"title":"A novel low-cost medium entropy alloys with excellent mechanical properties via multiple strengthening mechanisms","authors":"Na Li , Shilin Feng , Shugang Sun , Ran Wei","doi":"10.1016/j.intermet.2024.108329","DOIUrl":null,"url":null,"abstract":"<div><p>The microstructure and tensile mechanical properties of novel FeNiCrAl<sub>x</sub>Ti<sub>y</sub> medium-entropy alloys (MEAs) were investigated. The results showed that the microstructure of the MEAs undergoes a transformation from FCC single-phase to FCC + BCC dual-phase with increasing Ti and Al content. The addition of Ti and Al significantly increases the strength while maintaining appropriate ductility. Specifically, the (FeNiCr)<sub>94</sub>Ti<sub>2</sub>Al<sub>4</sub> exhibits excellent combinations of yield strength (∼1.2 GPa and ∼1.5 GPa) and tensile ductility (13 % and 19 %) at both 298 K and 77 K. Microstructural analysis reveals that the excellent cryogenic mechanical properties are attributed to the co-existing multiple strengthening mechanisms. This work provides a simple route for designing low-cost MEAs with excellent cryogenic tensile properties.</p></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":null,"pages":null},"PeriodicalIF":4.3000,"publicationDate":"2024-05-12","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/S0966979524001481","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 microstructure and tensile mechanical properties of novel FeNiCrAlxTiy medium-entropy alloys (MEAs) were investigated. The results showed that the microstructure of the MEAs undergoes a transformation from FCC single-phase to FCC + BCC dual-phase with increasing Ti and Al content. The addition of Ti and Al significantly increases the strength while maintaining appropriate ductility. Specifically, the (FeNiCr)94Ti2Al4 exhibits excellent combinations of yield strength (∼1.2 GPa and ∼1.5 GPa) and tensile ductility (13 % and 19 %) at both 298 K and 77 K. Microstructural analysis reveals that the excellent cryogenic mechanical properties are attributed to the co-existing multiple strengthening mechanisms. This work provides a simple route for designing low-cost MEAs with excellent cryogenic tensile properties.
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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