Effect of Heat Treatment on Microstructure, Tensile Properties and High-Temperature Corrosion Resistance of the FeCrMnNi High Entropy Alloy
FeCrMnNi high-entropy alloys prepared by vacuum induction melting were tested and characterized using an X-ray diffractometer, a scanning electron microscope, a micro hardness tester and a universal tensile tester to investigate the effects of the heat treatment temperature on the microstructure and...
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| Format: | Article |
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MDPI AG
2022-09-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/12/9/1537 |
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| author | Zhen Cai Na Wei Yaolei Han Fang Si Lei Mi Chenhui Zhang Xiaohua Liu Fengyang Jiang Tiandong Wu |
| author_facet | Zhen Cai Na Wei Yaolei Han Fang Si Lei Mi Chenhui Zhang Xiaohua Liu Fengyang Jiang Tiandong Wu |
| author_sort | Zhen Cai |
| collection | DOAJ |
| description | FeCrMnNi high-entropy alloys prepared by vacuum induction melting were tested and characterized using an X-ray diffractometer, a scanning electron microscope, a micro hardness tester and a universal tensile tester to investigate the effects of the heat treatment temperature on the microstructure and mechanical properties of the alloys and the heat-resistant corrosion properties of FeCrMnNi alloy after annealing at 800 °C. It is a high-entropy alloy with a typical dendritic (DR) morphology. With the increase in the heat-treatment temperature, the amount of ultrafine precipitates with the BCC structure in the matrix increased; furthermore, the amount of ultrafine precipitates started to decrease at temperatures above 900 °C, and the DR structure gradually weakened. After heat treatment at temperatures above 800 °C, the alloy showed a tensile strength of 721.1 MPa and an elongation at break of 26.7%, which indicates improved strength of the alloy while maintaining good plasticity, mainly because a large amount of nanoscale particles precipitated between the DR structures and enabled fine grain strengthening. Therefore, an appropriate heat-treatment temperature helps to improve the overall mechanical properties of the high-entropy alloy. |
| first_indexed | 2024-03-09T23:09:44Z |
| format | Article |
| id | doaj.art-610b95e9603149ee97c0983715f91459 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T23:09:44Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-610b95e9603149ee97c0983715f914592023-11-23T17:47:44ZengMDPI AGMetals2075-47012022-09-01129153710.3390/met12091537Effect of Heat Treatment on Microstructure, Tensile Properties and High-Temperature Corrosion Resistance of the FeCrMnNi High Entropy AlloyZhen Cai0Na Wei1Yaolei Han2Fang Si3Lei Mi4Chenhui Zhang5Xiaohua Liu6Fengyang Jiang7Tiandong Wu8Power Station Life Management Technology Center, Suzhou Nuclear Power Research Institute, Suzhou 215004, ChinaTechnology Center, Xi’an Chao Jing Technology Co., Ltd., Xi’an 710200, ChinaPower Station Life Management Technology Center, Suzhou Nuclear Power Research Institute, Suzhou 215004, ChinaSchool of Materials Engineering, Xi’an Polytechnic University, Xi’an 710048, ChinaTechnology Center, Xi’an Chao Jing Technology Co., Ltd., Xi’an 710200, ChinaTechnology Center, Xi’an Chao Jing Technology Co., Ltd., Xi’an 710200, ChinaTechnology Center, Xi’an Chao Jing Technology Co., Ltd., Xi’an 710200, ChinaSchool of Materials Engineering, Xi’an Polytechnic University, Xi’an 710048, ChinaTechnology Center, Xi’an Chao Jing Technology Co., Ltd., Xi’an 710200, ChinaFeCrMnNi high-entropy alloys prepared by vacuum induction melting were tested and characterized using an X-ray diffractometer, a scanning electron microscope, a micro hardness tester and a universal tensile tester to investigate the effects of the heat treatment temperature on the microstructure and mechanical properties of the alloys and the heat-resistant corrosion properties of FeCrMnNi alloy after annealing at 800 °C. It is a high-entropy alloy with a typical dendritic (DR) morphology. With the increase in the heat-treatment temperature, the amount of ultrafine precipitates with the BCC structure in the matrix increased; furthermore, the amount of ultrafine precipitates started to decrease at temperatures above 900 °C, and the DR structure gradually weakened. After heat treatment at temperatures above 800 °C, the alloy showed a tensile strength of 721.1 MPa and an elongation at break of 26.7%, which indicates improved strength of the alloy while maintaining good plasticity, mainly because a large amount of nanoscale particles precipitated between the DR structures and enabled fine grain strengthening. Therefore, an appropriate heat-treatment temperature helps to improve the overall mechanical properties of the high-entropy alloy.https://www.mdpi.com/2075-4701/12/9/1537high entropy alloyheat treatmentmicrostructuremechanical propertieshigh temperature steam corrosion |
| spellingShingle | Zhen Cai Na Wei Yaolei Han Fang Si Lei Mi Chenhui Zhang Xiaohua Liu Fengyang Jiang Tiandong Wu Effect of Heat Treatment on Microstructure, Tensile Properties and High-Temperature Corrosion Resistance of the FeCrMnNi High Entropy Alloy Metals high entropy alloy heat treatment microstructure mechanical properties high temperature steam corrosion |
| title | Effect of Heat Treatment on Microstructure, Tensile Properties and High-Temperature Corrosion Resistance of the FeCrMnNi High Entropy Alloy |
| title_full | Effect of Heat Treatment on Microstructure, Tensile Properties and High-Temperature Corrosion Resistance of the FeCrMnNi High Entropy Alloy |
| title_fullStr | Effect of Heat Treatment on Microstructure, Tensile Properties and High-Temperature Corrosion Resistance of the FeCrMnNi High Entropy Alloy |
| title_full_unstemmed | Effect of Heat Treatment on Microstructure, Tensile Properties and High-Temperature Corrosion Resistance of the FeCrMnNi High Entropy Alloy |
| title_short | Effect of Heat Treatment on Microstructure, Tensile Properties and High-Temperature Corrosion Resistance of the FeCrMnNi High Entropy Alloy |
| title_sort | effect of heat treatment on microstructure tensile properties and high temperature corrosion resistance of the fecrmnni high entropy alloy |
| topic | high entropy alloy heat treatment microstructure mechanical properties high temperature steam corrosion |
| url | https://www.mdpi.com/2075-4701/12/9/1537 |
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