Effect of Mn Doping on Microstructure and Corrosion Behavior of CoCuNiTi High-Entropy Alloy Coatings
Mn-doped CoCuNiTi HEACs were prepared on 45 carbon steel substrate by laser cladding. CoCuNiTi and CoCuMnNiTi HEACs are dual-phase structures composed of FCC and BCC. The addition of Mn causes a decrease in the lattice constant and cell volume of the above two phases, as well as an increase in the d...
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2024-12-01
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| Series: | Crystals |
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| author | Mingxing Ma Zhixin Wang Chengjun Zhu Ying Dong Lixin Liu Liang Zhao Qingxue Cui Dachuan Zhu Deliang Zhang |
| author_facet | Mingxing Ma Zhixin Wang Chengjun Zhu Ying Dong Lixin Liu Liang Zhao Qingxue Cui Dachuan Zhu Deliang Zhang |
| author_sort | Mingxing Ma |
| collection | DOAJ |
| description | Mn-doped CoCuNiTi HEACs were prepared on 45 carbon steel substrate by laser cladding. CoCuNiTi and CoCuMnNiTi HEACs are dual-phase structures composed of FCC and BCC. The addition of Mn causes a decrease in the lattice constant and cell volume of the above two phases, as well as an increase in the density of the two phases and the FCC phase content. The microstructures of the two alloys are the typical dendritic structures. Ti and Co elements are enriched in the dendrite region; Cu element is enriched in the interdendrite region; the distribution of Mn is the most uniform in the dendrite and interdendrite regions. The addition of Mn element causes the microstructure to be significantly refined, and the width of the primary dendrite is reduced from 8.10 μm to 4.11 μm. CoCuNiTi alloy belongs to activation dissolution, and the Mn-containing alloy exhibits an obvious passivation zone. The addition of Mn element increases the capacitive reactance arc radius and the maximum phase angle of the alloy, indicating that the corrosion resistance of the Mn-containing alloy is significantly improved. |
| format | Article |
| id | doaj-art-0bbdec5329f041a385e8ed3a5a00243b |
| institution | Kabale University |
| issn | 2073-4352 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Crystals |
| spelling | doaj-art-0bbdec5329f041a385e8ed3a5a00243b2025-01-24T13:28:03ZengMDPI AGCrystals2073-43522024-12-011512910.3390/cryst15010029Effect of Mn Doping on Microstructure and Corrosion Behavior of CoCuNiTi High-Entropy Alloy CoatingsMingxing Ma0Zhixin Wang1Chengjun Zhu2Ying Dong3Lixin Liu4Liang Zhao5Qingxue Cui6Dachuan Zhu7Deliang Zhang8School of Mechanical Engineering, Henan Polytechnic Institute, Nanyang 473000, ChinaSchool of Materials Electronics and Energy Storage, Zhongyuan University of Technology, Zhengzhou 451191, ChinaSchool of Mechanical Engineering, Henan Polytechnic Institute, Nanyang 473000, ChinaSchool of Mechanical Engineering, Henan Polytechnic Institute, Nanyang 473000, ChinaSchool of Mechanical Engineering, Henan Polytechnic Institute, Nanyang 473000, ChinaSchool of Materials Electronics and Energy Storage, Zhongyuan University of Technology, Zhengzhou 451191, ChinaSchool of Materials Electronics and Energy Storage, Zhongyuan University of Technology, Zhengzhou 451191, ChinaCollege of Material Science and Engineering, Sichuan University, Chengdu 610065, ChinaSchool of Materials Science and Engineering, Northeastern University, Shenyang 110819, ChinaMn-doped CoCuNiTi HEACs were prepared on 45 carbon steel substrate by laser cladding. CoCuNiTi and CoCuMnNiTi HEACs are dual-phase structures composed of FCC and BCC. The addition of Mn causes a decrease in the lattice constant and cell volume of the above two phases, as well as an increase in the density of the two phases and the FCC phase content. The microstructures of the two alloys are the typical dendritic structures. Ti and Co elements are enriched in the dendrite region; Cu element is enriched in the interdendrite region; the distribution of Mn is the most uniform in the dendrite and interdendrite regions. The addition of Mn element causes the microstructure to be significantly refined, and the width of the primary dendrite is reduced from 8.10 μm to 4.11 μm. CoCuNiTi alloy belongs to activation dissolution, and the Mn-containing alloy exhibits an obvious passivation zone. The addition of Mn element increases the capacitive reactance arc radius and the maximum phase angle of the alloy, indicating that the corrosion resistance of the Mn-containing alloy is significantly improved.https://www.mdpi.com/2073-4352/15/1/29CoCuNiTihigh-entropy alloy coatingwhole pattern fittingphase compositioncorrosion protectionlaser cladding |
| spellingShingle | Mingxing Ma Zhixin Wang Chengjun Zhu Ying Dong Lixin Liu Liang Zhao Qingxue Cui Dachuan Zhu Deliang Zhang Effect of Mn Doping on Microstructure and Corrosion Behavior of CoCuNiTi High-Entropy Alloy Coatings Crystals CoCuNiTi high-entropy alloy coating whole pattern fitting phase composition corrosion protection laser cladding |
| title | Effect of Mn Doping on Microstructure and Corrosion Behavior of CoCuNiTi High-Entropy Alloy Coatings |
| title_full | Effect of Mn Doping on Microstructure and Corrosion Behavior of CoCuNiTi High-Entropy Alloy Coatings |
| title_fullStr | Effect of Mn Doping on Microstructure and Corrosion Behavior of CoCuNiTi High-Entropy Alloy Coatings |
| title_full_unstemmed | Effect of Mn Doping on Microstructure and Corrosion Behavior of CoCuNiTi High-Entropy Alloy Coatings |
| title_short | Effect of Mn Doping on Microstructure and Corrosion Behavior of CoCuNiTi High-Entropy Alloy Coatings |
| title_sort | effect of mn doping on microstructure and corrosion behavior of cocuniti high entropy alloy coatings |
| topic | CoCuNiTi high-entropy alloy coating whole pattern fitting phase composition corrosion protection laser cladding |
| url | https://www.mdpi.com/2073-4352/15/1/29 |
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