The Structure of the Near-Surface Layer of the AAAC Overhead Power Line Wires after Operation and Its Effect on Their Elastic, Microplastic, and Electroresistance Properties
Overhead power-transmission lines are one of the most important components of modern infrastructure. Their service life is determined by the state of the near-surface defect layers (NSDLs) of wires constituting these lines. Both the structure and microstructure of the NSDLs of wires of the AAAC type...
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| Format: | Article |
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MDPI AG
2022-01-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/12/2/166 |
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| author | Maria V. Narykova Aleksandr A. Levin Nikita D. Prasolov Alexey I. Lihachev Boris K. Kardashev Andrej G. Kadomtsev Andrei G. Panfilov Roman V. Sokolov Pavel N. Brunkov Makhsud M. Sultanov Vasily N. Kuryanov Vladimir N. Tyshkevich |
| author_facet | Maria V. Narykova Aleksandr A. Levin Nikita D. Prasolov Alexey I. Lihachev Boris K. Kardashev Andrej G. Kadomtsev Andrei G. Panfilov Roman V. Sokolov Pavel N. Brunkov Makhsud M. Sultanov Vasily N. Kuryanov Vladimir N. Tyshkevich |
| author_sort | Maria V. Narykova |
| collection | DOAJ |
| description | Overhead power-transmission lines are one of the most important components of modern infrastructure. Their service life is determined by the state of the near-surface defect layers (NSDLs) of wires constituting these lines. Both the structure and microstructure of the NSDLs of wires of the AAAC type (All Aluminum Alloy Conductor), which were in operation during 0 (new) to 62 years, were investigated by methods of the X-ray (XRD) and electron back-scattering diffraction, optical microscopy, and resistivity measurements, as well as by means of densitometric and acoustic measurements with layer-by-layer removal of the near-surface material by etching. Two characteristic thicknesses of the NSDLs were obtained, different methods providing close results, namely, ~30–50 μm and ~56–140 μm. According to the mass-density distribution (XRD), these characteristic thicknesses correspond to the depths from the surface where they occur, respectively, ~70% and ~99% of the density drop in comparison with the bulk density value. The rate of increase in NSDL thickness is ~4 μm/year in the interval from 0 to 18 years. Results of investigation of elastic and microplastic properties of wires after removal of ~35 μm of the upper layer are also presented. |
| first_indexed | 2024-03-09T22:14:54Z |
| format | Article |
| id | doaj.art-04f21329ae6d4fc3a9fb5ef171d20b11 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-09T22:14:54Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-04f21329ae6d4fc3a9fb5ef171d20b112023-11-23T19:23:59ZengMDPI AGCrystals2073-43522022-01-0112216610.3390/cryst12020166The Structure of the Near-Surface Layer of the AAAC Overhead Power Line Wires after Operation and Its Effect on Their Elastic, Microplastic, and Electroresistance PropertiesMaria V. Narykova0Aleksandr A. Levin1Nikita D. Prasolov2Alexey I. Lihachev3Boris K. Kardashev4Andrej G. Kadomtsev5Andrei G. Panfilov6Roman V. Sokolov7Pavel N. Brunkov8Makhsud M. Sultanov9Vasily N. Kuryanov10Vladimir N. Tyshkevich11Ioffe Institute, Politekhnicheskaya ul. 26, 194021 St. Petersburg, RussiaIoffe Institute, Politekhnicheskaya ul. 26, 194021 St. Petersburg, RussiaIoffe Institute, Politekhnicheskaya ul. 26, 194021 St. Petersburg, RussiaIoffe Institute, Politekhnicheskaya ul. 26, 194021 St. Petersburg, RussiaIoffe Institute, Politekhnicheskaya ul. 26, 194021 St. Petersburg, RussiaIoffe Institute, Politekhnicheskaya ul. 26, 194021 St. Petersburg, RussiaIoffe Institute, Politekhnicheskaya ul. 26, 194021 St. Petersburg, RussiaIoffe Institute, Politekhnicheskaya ul. 26, 194021 St. Petersburg, RussiaIoffe Institute, Politekhnicheskaya ul. 26, 194021 St. Petersburg, RussiaMoscow Power Engineering Institute, National Research University, Volzhsky branch, Lenina pr. 69, 404110 Volzhsky, RussiaMoscow Power Engineering Institute, National Research University, Volzhsky branch, Lenina pr. 69, 404110 Volzhsky, RussiaMoscow Power Engineering Institute, National Research University, Volzhsky branch, Lenina pr. 69, 404110 Volzhsky, RussiaOverhead power-transmission lines are one of the most important components of modern infrastructure. Their service life is determined by the state of the near-surface defect layers (NSDLs) of wires constituting these lines. Both the structure and microstructure of the NSDLs of wires of the AAAC type (All Aluminum Alloy Conductor), which were in operation during 0 (new) to 62 years, were investigated by methods of the X-ray (XRD) and electron back-scattering diffraction, optical microscopy, and resistivity measurements, as well as by means of densitometric and acoustic measurements with layer-by-layer removal of the near-surface material by etching. Two characteristic thicknesses of the NSDLs were obtained, different methods providing close results, namely, ~30–50 μm and ~56–140 μm. According to the mass-density distribution (XRD), these characteristic thicknesses correspond to the depths from the surface where they occur, respectively, ~70% and ~99% of the density drop in comparison with the bulk density value. The rate of increase in NSDL thickness is ~4 μm/year in the interval from 0 to 18 years. Results of investigation of elastic and microplastic properties of wires after removal of ~35 μm of the upper layer are also presented.https://www.mdpi.com/2073-4352/12/2/166aluminum wiresoverhead power transmission linesXRDEBSDoptical microscopydensitometry |
| spellingShingle | Maria V. Narykova Aleksandr A. Levin Nikita D. Prasolov Alexey I. Lihachev Boris K. Kardashev Andrej G. Kadomtsev Andrei G. Panfilov Roman V. Sokolov Pavel N. Brunkov Makhsud M. Sultanov Vasily N. Kuryanov Vladimir N. Tyshkevich The Structure of the Near-Surface Layer of the AAAC Overhead Power Line Wires after Operation and Its Effect on Their Elastic, Microplastic, and Electroresistance Properties Crystals aluminum wires overhead power transmission lines XRD EBSD optical microscopy densitometry |
| title | The Structure of the Near-Surface Layer of the AAAC Overhead Power Line Wires after Operation and Its Effect on Their Elastic, Microplastic, and Electroresistance Properties |
| title_full | The Structure of the Near-Surface Layer of the AAAC Overhead Power Line Wires after Operation and Its Effect on Their Elastic, Microplastic, and Electroresistance Properties |
| title_fullStr | The Structure of the Near-Surface Layer of the AAAC Overhead Power Line Wires after Operation and Its Effect on Their Elastic, Microplastic, and Electroresistance Properties |
| title_full_unstemmed | The Structure of the Near-Surface Layer of the AAAC Overhead Power Line Wires after Operation and Its Effect on Their Elastic, Microplastic, and Electroresistance Properties |
| title_short | The Structure of the Near-Surface Layer of the AAAC Overhead Power Line Wires after Operation and Its Effect on Their Elastic, Microplastic, and Electroresistance Properties |
| title_sort | structure of the near surface layer of the aaac overhead power line wires after operation and its effect on their elastic microplastic and electroresistance properties |
| topic | aluminum wires overhead power transmission lines XRD EBSD optical microscopy densitometry |
| url | https://www.mdpi.com/2073-4352/12/2/166 |
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