Tuning Corrosion Resistance and AC Soft Magnetic Properties of Fe-Co-Ni-Al Medium-Entropy Alloy via Ni Content
Corrosion of soft magnetic materials during service can significantly impact their performance and service life, therefore it is important to improve their corrosion resistance. In this paper, the corrosion resistance, alternating current soft magnetic properties (AC SMPs) and microstructure of FeCo...
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2024-11-01
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| author | Wenfeng Peng Yubing Xia Hui Xu Xiaohua Tan |
| author_facet | Wenfeng Peng Yubing Xia Hui Xu Xiaohua Tan |
| author_sort | Wenfeng Peng |
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| description | Corrosion of soft magnetic materials during service can significantly impact their performance and service life, therefore it is important to improve their corrosion resistance. In this paper, the corrosion resistance, alternating current soft magnetic properties (AC SMPs) and microstructure of FeCoNi<i><sub>x</sub></i>Al (<i>x</i> = 1.0–2.0) medium-entropy alloys (MEAs) were studied. Corrosion resistance is greatly improved with an increase in Ni content. The <i>x</i> = 2.0 alloy has the lowest corrosion current density (<i>I<sub>corr</sub></i> = 2.67 × 10<sup>−7</sup> A/cm<sup>2</sup>), which is reduced by 71% compared to the <i>x</i> = 1.0 alloy. Increasing the Ni content can improve the AC SMPs of the alloy. When <i>x</i> = 1.75, the total loss (<i>P<sub>s</sub></i>) is improved by 6% compared to the <i>x</i> = 1.0 alloy. X-ray diffraction (XRD) and scanning electron microscopy (SEM) show that the increase in Ni content is beneficial for promoting the formation of the face-centered-cubic (FCC) phase, and the body-centered-cubic (BCC) phase is gradually divided by the FCC phase. Electron backscatter diffraction (EBSD) shows that, with the increase in Ni content, the number of grain boundaries in the alloy is greatly reduced and numerous phase boundaries appear in the alloys. The degree of strain concentration is significantly reduced with the increasing Ni content. The corrosion mechanism of alloys is also discussed in this paper. Our study provides a method to balance the soft magnetic properties and corrosion resistance, paving the way for potential applications of Fe-Co-Ni-Al MEAs in corrosive environments. |
| format | Article |
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| institution | Kabale University |
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| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
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| series | Entropy |
| spelling | doaj-art-ea20bc3f9e234b19b8d5ccbc6ab992172024-12-27T14:25:00ZengMDPI AGEntropy1099-43002024-11-012612103810.3390/e26121038Tuning Corrosion Resistance and AC Soft Magnetic Properties of Fe-Co-Ni-Al Medium-Entropy Alloy via Ni ContentWenfeng Peng0Yubing Xia1Hui Xu2Xiaohua Tan3Institute of Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200072, ChinaInstitute of Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200072, ChinaInstitute of Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200072, ChinaInstitute of Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200072, ChinaCorrosion of soft magnetic materials during service can significantly impact their performance and service life, therefore it is important to improve their corrosion resistance. In this paper, the corrosion resistance, alternating current soft magnetic properties (AC SMPs) and microstructure of FeCoNi<i><sub>x</sub></i>Al (<i>x</i> = 1.0–2.0) medium-entropy alloys (MEAs) were studied. Corrosion resistance is greatly improved with an increase in Ni content. The <i>x</i> = 2.0 alloy has the lowest corrosion current density (<i>I<sub>corr</sub></i> = 2.67 × 10<sup>−7</sup> A/cm<sup>2</sup>), which is reduced by 71% compared to the <i>x</i> = 1.0 alloy. Increasing the Ni content can improve the AC SMPs of the alloy. When <i>x</i> = 1.75, the total loss (<i>P<sub>s</sub></i>) is improved by 6% compared to the <i>x</i> = 1.0 alloy. X-ray diffraction (XRD) and scanning electron microscopy (SEM) show that the increase in Ni content is beneficial for promoting the formation of the face-centered-cubic (FCC) phase, and the body-centered-cubic (BCC) phase is gradually divided by the FCC phase. Electron backscatter diffraction (EBSD) shows that, with the increase in Ni content, the number of grain boundaries in the alloy is greatly reduced and numerous phase boundaries appear in the alloys. The degree of strain concentration is significantly reduced with the increasing Ni content. The corrosion mechanism of alloys is also discussed in this paper. Our study provides a method to balance the soft magnetic properties and corrosion resistance, paving the way for potential applications of Fe-Co-Ni-Al MEAs in corrosive environments.https://www.mdpi.com/1099-4300/26/12/1038medium-entropy alloys (MEAs)soft magnetic propertiescorrosion resistancephase constitutiongrain boundary distribution |
| spellingShingle | Wenfeng Peng Yubing Xia Hui Xu Xiaohua Tan Tuning Corrosion Resistance and AC Soft Magnetic Properties of Fe-Co-Ni-Al Medium-Entropy Alloy via Ni Content Entropy medium-entropy alloys (MEAs) soft magnetic properties corrosion resistance phase constitution grain boundary distribution |
| title | Tuning Corrosion Resistance and AC Soft Magnetic Properties of Fe-Co-Ni-Al Medium-Entropy Alloy via Ni Content |
| title_full | Tuning Corrosion Resistance and AC Soft Magnetic Properties of Fe-Co-Ni-Al Medium-Entropy Alloy via Ni Content |
| title_fullStr | Tuning Corrosion Resistance and AC Soft Magnetic Properties of Fe-Co-Ni-Al Medium-Entropy Alloy via Ni Content |
| title_full_unstemmed | Tuning Corrosion Resistance and AC Soft Magnetic Properties of Fe-Co-Ni-Al Medium-Entropy Alloy via Ni Content |
| title_short | Tuning Corrosion Resistance and AC Soft Magnetic Properties of Fe-Co-Ni-Al Medium-Entropy Alloy via Ni Content |
| title_sort | tuning corrosion resistance and ac soft magnetic properties of fe co ni al medium entropy alloy via ni content |
| topic | medium-entropy alloys (MEAs) soft magnetic properties corrosion resistance phase constitution grain boundary distribution |
| url | https://www.mdpi.com/1099-4300/26/12/1038 |
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