Study on Corrosion Behavior of Ultrafine-Grained Ti-6Al-7Nb Fabricated by Equal Channel Angular Pressing
The aim of this study was to investigate the corrosion resistance of ultrafine-grained (UFG) Ti-6Al-7Nb fabricated by equal channel angular pressing (ECAP) and coarse-grained (CG) Ti- 6Al- 7Nb. The microstructure of each specimen was investigated by the electron backscattered diffraction (EBSD) meth...
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MDPI AG
2020-07-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/7/950 |
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| author | Zequn Yu Yuecheng Dong Xin Li Jingzhe Niu Igor Alexandrov Hui Chang |
| author_facet | Zequn Yu Yuecheng Dong Xin Li Jingzhe Niu Igor Alexandrov Hui Chang |
| author_sort | Zequn Yu |
| collection | DOAJ |
| description | The aim of this study was to investigate the corrosion resistance of ultrafine-grained (UFG) Ti-6Al-7Nb fabricated by equal channel angular pressing (ECAP) and coarse-grained (CG) Ti- 6Al- 7Nb. The microstructure of each specimen was investigated by the electron backscattered diffraction (EBSD) method. The corrosion behavior of each specimen was determined by electrochemical measurement in Ringer’s solution. The surface corroded morphologies and oxide film formed on Ti-6Al-7Nb alloy after electrochemical measurement were investigated by scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). EBSD investigation shows that the grain size of UFG Ti-6Al-7Nb decreased to ~0.4 µm, accompanied by low angle grain boundaries (LAGBs) accounting for 39%. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) results indicated that UFG Ti-6Al-7Nb alloy possessed a better corrosion resistance. The surface corroded morphologies revealed many small and shallow corrosion pits, which can be attributed to the good compactness of the oxide film and a rapid self- repairing ability of the UFG Ti-6Al-7Nb alloy. |
| first_indexed | 2024-03-10T18:28:15Z |
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| id | doaj.art-00860edd48f94a7898a7ed2caa940aeb |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T18:28:15Z |
| publishDate | 2020-07-01 |
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| series | Metals |
| spelling | doaj.art-00860edd48f94a7898a7ed2caa940aeb2023-11-20T06:46:49ZengMDPI AGMetals2075-47012020-07-0110795010.3390/met10070950Study on Corrosion Behavior of Ultrafine-Grained Ti-6Al-7Nb Fabricated by Equal Channel Angular PressingZequn Yu0Yuecheng Dong1Xin Li2Jingzhe Niu3Igor Alexandrov4Hui Chang5College of Materials Science and Engineering/Tech Institute for Advanced Materials, Nanjing Tech University, Nanjing 211816, ChinaCollege of Materials Science and Engineering/Tech Institute for Advanced Materials, Nanjing Tech University, Nanjing 211816, ChinaCollege of Materials Science and Engineering/Tech Institute for Advanced Materials, Nanjing Tech University, Nanjing 211816, ChinaState Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, ChinaThe Department of Physics, Ufa State Aviation Technical University, 450008 Ufa, RussiaCollege of Materials Science and Engineering/Tech Institute for Advanced Materials, Nanjing Tech University, Nanjing 211816, ChinaThe aim of this study was to investigate the corrosion resistance of ultrafine-grained (UFG) Ti-6Al-7Nb fabricated by equal channel angular pressing (ECAP) and coarse-grained (CG) Ti- 6Al- 7Nb. The microstructure of each specimen was investigated by the electron backscattered diffraction (EBSD) method. The corrosion behavior of each specimen was determined by electrochemical measurement in Ringer’s solution. The surface corroded morphologies and oxide film formed on Ti-6Al-7Nb alloy after electrochemical measurement were investigated by scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). EBSD investigation shows that the grain size of UFG Ti-6Al-7Nb decreased to ~0.4 µm, accompanied by low angle grain boundaries (LAGBs) accounting for 39%. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) results indicated that UFG Ti-6Al-7Nb alloy possessed a better corrosion resistance. The surface corroded morphologies revealed many small and shallow corrosion pits, which can be attributed to the good compactness of the oxide film and a rapid self- repairing ability of the UFG Ti-6Al-7Nb alloy.https://www.mdpi.com/2075-4701/10/7/950corrosion resistanceTi-6Al-7Nb alloyultrafine-grainedequal channel angular pressingoxide film |
| spellingShingle | Zequn Yu Yuecheng Dong Xin Li Jingzhe Niu Igor Alexandrov Hui Chang Study on Corrosion Behavior of Ultrafine-Grained Ti-6Al-7Nb Fabricated by Equal Channel Angular Pressing Metals corrosion resistance Ti-6Al-7Nb alloy ultrafine-grained equal channel angular pressing oxide film |
| title | Study on Corrosion Behavior of Ultrafine-Grained Ti-6Al-7Nb Fabricated by Equal Channel Angular Pressing |
| title_full | Study on Corrosion Behavior of Ultrafine-Grained Ti-6Al-7Nb Fabricated by Equal Channel Angular Pressing |
| title_fullStr | Study on Corrosion Behavior of Ultrafine-Grained Ti-6Al-7Nb Fabricated by Equal Channel Angular Pressing |
| title_full_unstemmed | Study on Corrosion Behavior of Ultrafine-Grained Ti-6Al-7Nb Fabricated by Equal Channel Angular Pressing |
| title_short | Study on Corrosion Behavior of Ultrafine-Grained Ti-6Al-7Nb Fabricated by Equal Channel Angular Pressing |
| title_sort | study on corrosion behavior of ultrafine grained ti 6al 7nb fabricated by equal channel angular pressing |
| topic | corrosion resistance Ti-6Al-7Nb alloy ultrafine-grained equal channel angular pressing oxide film |
| url | https://www.mdpi.com/2075-4701/10/7/950 |
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