Enhancing creep resistance of aged Fe–Cr–Ni medium-entropy alloy via nano-sized Cu-rich and NbC precipitates investigated by nanoindentation
Materials with high creep resistance are required for next-generation fossil and nuclear power plants. In this study, the effect of aging on the creep resistance of a Fe–Cr–Ni medium-entropy alloy (MEA) was investigated via a nanoindentation test. The precipitate evolution in the aged MEA was analyz...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422012510 |
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| author | Jianbing Gao Zhenlin Xu Xudong Fang Junjing He Weihuo Li Xiaojie Du Yizhu He Xiquan Jia Shengxuan Zhou |
| author_facet | Jianbing Gao Zhenlin Xu Xudong Fang Junjing He Weihuo Li Xiaojie Du Yizhu He Xiquan Jia Shengxuan Zhou |
| author_sort | Jianbing Gao |
| collection | DOAJ |
| description | Materials with high creep resistance are required for next-generation fossil and nuclear power plants. In this study, the effect of aging on the creep resistance of a Fe–Cr–Ni medium-entropy alloy (MEA) was investigated via a nanoindentation test. The precipitate evolution in the aged MEA was analyzed by the electron channeling contrast imaging (ECCI) technique. The volume fraction and size of the precipitates in different aging states were characterized and analyzed quantitatively. The strain rate sensitivity and activation volume were estimated to analyze the creep properties and mechanism. The precipitates of the MEA evolved with aging time, consisting of Z phases, M23C6 carbides, Cu-rich, and NbC particles. With the extension of aging time, the strain rate sensitivity first increased, then decreased, and finally tended to be stable. The creep behavior of the Fe–Cr–Ni MEA was controlled by the interaction between dislocation and precipitates. The Fe–Cr–Ni MEA has excellent creep resistance after long-term aging, benefiting from the nano-sized Cu-rich and NbC precipitates that significantly enlarged the dislocation pinning effect. The understandings obtained from this work could benefit the development and optimization of the creep-resistant MEAs. |
| first_indexed | 2024-04-12T01:44:44Z |
| format | Article |
| id | doaj.art-384607a38d48478e827b56b802676fc4 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-12T01:44:44Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-384607a38d48478e827b56b802676fc42022-12-22T03:53:06ZengElsevierJournal of Materials Research and Technology2238-78542022-09-012018601872Enhancing creep resistance of aged Fe–Cr–Ni medium-entropy alloy via nano-sized Cu-rich and NbC precipitates investigated by nanoindentationJianbing Gao0Zhenlin Xu1Xudong Fang2Junjing He3Weihuo Li4Xiaojie Du5Yizhu He6Xiquan Jia7Shengxuan Zhou8School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, ChinaSchool of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, ChinaState Key Laboratory of Advanced Stainless Steel, Taiyuan Iron and Steel (Group) Co., Ltd, Taiyuan 030003, ChinaSchool of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, ChinaSchool of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, ChinaSchool of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, ChinaSchool of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, China; Corresponding author.School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, ChinaSchool of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, ChinaMaterials with high creep resistance are required for next-generation fossil and nuclear power plants. In this study, the effect of aging on the creep resistance of a Fe–Cr–Ni medium-entropy alloy (MEA) was investigated via a nanoindentation test. The precipitate evolution in the aged MEA was analyzed by the electron channeling contrast imaging (ECCI) technique. The volume fraction and size of the precipitates in different aging states were characterized and analyzed quantitatively. The strain rate sensitivity and activation volume were estimated to analyze the creep properties and mechanism. The precipitates of the MEA evolved with aging time, consisting of Z phases, M23C6 carbides, Cu-rich, and NbC particles. With the extension of aging time, the strain rate sensitivity first increased, then decreased, and finally tended to be stable. The creep behavior of the Fe–Cr–Ni MEA was controlled by the interaction between dislocation and precipitates. The Fe–Cr–Ni MEA has excellent creep resistance after long-term aging, benefiting from the nano-sized Cu-rich and NbC precipitates that significantly enlarged the dislocation pinning effect. The understandings obtained from this work could benefit the development and optimization of the creep-resistant MEAs.http://www.sciencedirect.com/science/article/pii/S2238785422012510Medium-entropy alloyCreepPrecipitateNanoindentationAging |
| spellingShingle | Jianbing Gao Zhenlin Xu Xudong Fang Junjing He Weihuo Li Xiaojie Du Yizhu He Xiquan Jia Shengxuan Zhou Enhancing creep resistance of aged Fe–Cr–Ni medium-entropy alloy via nano-sized Cu-rich and NbC precipitates investigated by nanoindentation Journal of Materials Research and Technology Medium-entropy alloy Creep Precipitate Nanoindentation Aging |
| title | Enhancing creep resistance of aged Fe–Cr–Ni medium-entropy alloy via nano-sized Cu-rich and NbC precipitates investigated by nanoindentation |
| title_full | Enhancing creep resistance of aged Fe–Cr–Ni medium-entropy alloy via nano-sized Cu-rich and NbC precipitates investigated by nanoindentation |
| title_fullStr | Enhancing creep resistance of aged Fe–Cr–Ni medium-entropy alloy via nano-sized Cu-rich and NbC precipitates investigated by nanoindentation |
| title_full_unstemmed | Enhancing creep resistance of aged Fe–Cr–Ni medium-entropy alloy via nano-sized Cu-rich and NbC precipitates investigated by nanoindentation |
| title_short | Enhancing creep resistance of aged Fe–Cr–Ni medium-entropy alloy via nano-sized Cu-rich and NbC precipitates investigated by nanoindentation |
| title_sort | enhancing creep resistance of aged fe cr ni medium entropy alloy via nano sized cu rich and nbc precipitates investigated by nanoindentation |
| topic | Medium-entropy alloy Creep Precipitate Nanoindentation Aging |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422012510 |
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