Y.S. Wang , J.Q. Yao , D.X. Wang , S.R. Li , Y. Shi , Z.H. Yin , X.P. Dong , X.W. Liu
{"title":"C掺杂AlCoCrFeNi2.1共晶高熵合金在600℃下的显微组织和相稳定性","authors":"Y.S. Wang , J.Q. Yao , D.X. Wang , S.R. Li , Y. Shi , Z.H. Yin , X.P. Dong , X.W. Liu","doi":"10.1016/j.nxmate.2024.100451","DOIUrl":null,"url":null,"abstract":"<div><div>The AlCoCrFeNi<sub>2.1</sub> eutectic high-entropy alloy (EHEA) presents a promising balance between high strength and ductility, with its excellent mechanical properties maintained up to 600–700 °C. C doping has been shown to further enhance its strength. However, the phase stability of the alloy remains uncertain. This study evaluated the microstructure and phase stability of both the as-cast AlCoCrFeNi<sub>2.1</sub> EHEA and its C-doped counterpart, (AlCoCrFeNi<sub>2.1</sub>)<sub>97</sub>C<sub>3</sub>, at 600 °C. After 20 days of annealing, the eutectic structure of the AlCoCrFeNi<sub>2.1</sub> EHEA exhibited slight coarsening in localized areas without phase decomposition. In contrast, the C-doped alloy developed needle-like and granular precipitates within the BCC phase.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100451"},"PeriodicalIF":0.0000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Microstructure and phase stability of C-doped AlCoCrFeNi2.1 eutectic high-entropy alloys at 600 °C\",\"authors\":\"Y.S. Wang , J.Q. Yao , D.X. Wang , S.R. Li , Y. Shi , Z.H. Yin , X.P. Dong , X.W. Liu\",\"doi\":\"10.1016/j.nxmate.2024.100451\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The AlCoCrFeNi<sub>2.1</sub> eutectic high-entropy alloy (EHEA) presents a promising balance between high strength and ductility, with its excellent mechanical properties maintained up to 600–700 °C. C doping has been shown to further enhance its strength. However, the phase stability of the alloy remains uncertain. This study evaluated the microstructure and phase stability of both the as-cast AlCoCrFeNi<sub>2.1</sub> EHEA and its C-doped counterpart, (AlCoCrFeNi<sub>2.1</sub>)<sub>97</sub>C<sub>3</sub>, at 600 °C. After 20 days of annealing, the eutectic structure of the AlCoCrFeNi<sub>2.1</sub> EHEA exhibited slight coarsening in localized areas without phase decomposition. In contrast, the C-doped alloy developed needle-like and granular precipitates within the BCC phase.</div></div>\",\"PeriodicalId\":100958,\"journal\":{\"name\":\"Next Materials\",\"volume\":\"7 \",\"pages\":\"Article 100451\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2025-04-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Next Materials\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2949822824003496\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2024/12/10 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Next Materials","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2949822824003496","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/12/10 0:00:00","PubModel":"Epub","JCR":"","JCRName":"","Score":null,"Total":0}
Microstructure and phase stability of C-doped AlCoCrFeNi2.1 eutectic high-entropy alloys at 600 °C
The AlCoCrFeNi2.1 eutectic high-entropy alloy (EHEA) presents a promising balance between high strength and ductility, with its excellent mechanical properties maintained up to 600–700 °C. C doping has been shown to further enhance its strength. However, the phase stability of the alloy remains uncertain. This study evaluated the microstructure and phase stability of both the as-cast AlCoCrFeNi2.1 EHEA and its C-doped counterpart, (AlCoCrFeNi2.1)97C3, at 600 °C. After 20 days of annealing, the eutectic structure of the AlCoCrFeNi2.1 EHEA exhibited slight coarsening in localized areas without phase decomposition. In contrast, the C-doped alloy developed needle-like and granular precipitates within the BCC phase.
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