Duplex Aging and Gas Nitriding Process as a Method of Surface Modification of Titanium Alloys for Aircraft Applications
This study discusses the effect of a duplex aging + nitriding process on the wear resistance of an aged double-phase titanium alloy, BT22. Nitriding was applied simultaneously with the heat treatment of the alloy, which is advantageous over the conventional heat and surface treatment methods applied...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-01-01
|
| Series: | Metals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4701/12/1/100 |
| _version_ | 1827664165088526336 |
|---|---|
| author | Oleksandr Tisov Magdalena Łępicka Yurii Tsybrii Alina Yurchuk Myroslav Kindrachuk Oleksandr Dukhota |
| author_facet | Oleksandr Tisov Magdalena Łępicka Yurii Tsybrii Alina Yurchuk Myroslav Kindrachuk Oleksandr Dukhota |
| author_sort | Oleksandr Tisov |
| collection | DOAJ |
| description | This study discusses the effect of a duplex aging + nitriding process on the wear resistance of an aged double-phase titanium alloy, BT22. Nitriding was applied simultaneously with the heat treatment of the alloy, which is advantageous over the conventional heat and surface treatment methods applied to titanium alloys. According to the results, the thickness of the case depth of the nitrided samples was 40–50 μm. Moreover, nitrogen was uniformly dispersed in the substrate, which was indicated by the hardness tests. The average microhardness of the substrate material was 300 HV<sub>0.01</sub>, while the hardness of the top layer was 1190 HV<sub>0.01</sub>, which is an almost four-fold increase. The applied duplex treatment substantially affected the wear performance of the tested alloy. For the untreated alloy, the maximum coefficient of friction was 0.8, while in the surface-modified sample, the maximum fluctuations reached 0.6. The abrasive wear process was dominant in the nitrided samples, while delamination and adhesive wear were observed for the untreated specimens. The nitrided alloy exhibited double the wear resistance of the untreated samples. The proposed treatment does not require additional time or energy consumption, providing a substantial technological advantage over conventional methods. Though the alpha case reduces the mechanical performance of titanium, the nitriding of only the component sections intended to withstand friction will have a positive effect. |
| first_indexed | 2024-03-10T00:56:20Z |
| format | Article |
| id | doaj.art-01a0a9f176154183b372d74b39bce29f |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T00:56:20Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-01a0a9f176154183b372d74b39bce29f2023-11-23T14:42:19ZengMDPI AGMetals2075-47012022-01-0112110010.3390/met12010100Duplex Aging and Gas Nitriding Process as a Method of Surface Modification of Titanium Alloys for Aircraft ApplicationsOleksandr Tisov0Magdalena Łępicka1Yurii Tsybrii2Alina Yurchuk3Myroslav Kindrachuk4Oleksandr Dukhota5School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaFaculty of Mechanical Engineering, Bialystok University of Technology, 15-351 Bialystok, PolandFaculty of Mechanical Engineering, Bialystok University of Technology, 15-351 Bialystok, PolandAerospace Faculty, National Aviation University, 03058 Kyiv, UkraineAerospace Faculty, National Aviation University, 03058 Kyiv, UkraineAerospace Faculty, National Aviation University, 03058 Kyiv, UkraineThis study discusses the effect of a duplex aging + nitriding process on the wear resistance of an aged double-phase titanium alloy, BT22. Nitriding was applied simultaneously with the heat treatment of the alloy, which is advantageous over the conventional heat and surface treatment methods applied to titanium alloys. According to the results, the thickness of the case depth of the nitrided samples was 40–50 μm. Moreover, nitrogen was uniformly dispersed in the substrate, which was indicated by the hardness tests. The average microhardness of the substrate material was 300 HV<sub>0.01</sub>, while the hardness of the top layer was 1190 HV<sub>0.01</sub>, which is an almost four-fold increase. The applied duplex treatment substantially affected the wear performance of the tested alloy. For the untreated alloy, the maximum coefficient of friction was 0.8, while in the surface-modified sample, the maximum fluctuations reached 0.6. The abrasive wear process was dominant in the nitrided samples, while delamination and adhesive wear were observed for the untreated specimens. The nitrided alloy exhibited double the wear resistance of the untreated samples. The proposed treatment does not require additional time or energy consumption, providing a substantial technological advantage over conventional methods. Though the alpha case reduces the mechanical performance of titanium, the nitriding of only the component sections intended to withstand friction will have a positive effect.https://www.mdpi.com/2075-4701/12/1/100duplex heat treatmentnitridingBT22titanium alloyswear resistance |
| spellingShingle | Oleksandr Tisov Magdalena Łępicka Yurii Tsybrii Alina Yurchuk Myroslav Kindrachuk Oleksandr Dukhota Duplex Aging and Gas Nitriding Process as a Method of Surface Modification of Titanium Alloys for Aircraft Applications Metals duplex heat treatment nitriding BT22 titanium alloys wear resistance |
| title | Duplex Aging and Gas Nitriding Process as a Method of Surface Modification of Titanium Alloys for Aircraft Applications |
| title_full | Duplex Aging and Gas Nitriding Process as a Method of Surface Modification of Titanium Alloys for Aircraft Applications |
| title_fullStr | Duplex Aging and Gas Nitriding Process as a Method of Surface Modification of Titanium Alloys for Aircraft Applications |
| title_full_unstemmed | Duplex Aging and Gas Nitriding Process as a Method of Surface Modification of Titanium Alloys for Aircraft Applications |
| title_short | Duplex Aging and Gas Nitriding Process as a Method of Surface Modification of Titanium Alloys for Aircraft Applications |
| title_sort | duplex aging and gas nitriding process as a method of surface modification of titanium alloys for aircraft applications |
| topic | duplex heat treatment nitriding BT22 titanium alloys wear resistance |
| url | https://www.mdpi.com/2075-4701/12/1/100 |
| work_keys_str_mv | AT oleksandrtisov duplexagingandgasnitridingprocessasamethodofsurfacemodificationoftitaniumalloysforaircraftapplications AT magdalenałepicka duplexagingandgasnitridingprocessasamethodofsurfacemodificationoftitaniumalloysforaircraftapplications AT yuriitsybrii duplexagingandgasnitridingprocessasamethodofsurfacemodificationoftitaniumalloysforaircraftapplications AT alinayurchuk duplexagingandgasnitridingprocessasamethodofsurfacemodificationoftitaniumalloysforaircraftapplications AT myroslavkindrachuk duplexagingandgasnitridingprocessasamethodofsurfacemodificationoftitaniumalloysforaircraftapplications AT oleksandrdukhota duplexagingandgasnitridingprocessasamethodofsurfacemodificationoftitaniumalloysforaircraftapplications |