The Effect of Laser Nitriding on Surface Characteristics and Wear Resistance of NiTi Alloy with Low Power Fiber Laser
The laser nitriding was performed in nitrogen gas at room temperature (20 °C) and low temperature (−190 °C) by a low power fiber laser to modify the wear and abrasion resistance of NiTi alloy. The surface roughness and element composition were analyzed by roughness device and energy-dispersive X-ray...
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| Format: | Article |
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MDPI AG
2021-01-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/2/515 |
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| author | Hao Wang Ralf Nett Evgeny L. Gurevich Andreas Ostendorf |
| author_facet | Hao Wang Ralf Nett Evgeny L. Gurevich Andreas Ostendorf |
| author_sort | Hao Wang |
| collection | DOAJ |
| description | The laser nitriding was performed in nitrogen gas at room temperature (20 °C) and low temperature (−190 °C) by a low power fiber laser to modify the wear and abrasion resistance of NiTi alloy. The surface roughness and element composition were analyzed by roughness device and energy-dispersive X-ray spectroscopy respectively. The results of roughness show that laser treatment can change the surface roughness due to the laser remelting. The effect of laser nitriding on the microhardness, friction coefficient, and worn scars of NiTi alloy was also studied, which shows that the microhardness of the NiTi alloy increases after laser nitriding. The optical microscope and scanning electron microscope were used to characterize the surface of NiTi alloy after wear testing to observe the microstructure of worn scars. The results show that the laser nitriding with different parameters can induce a nitride layer with different thicknesses and the higher energy deposition is the key factor for the formation of the nitride layer, which can decrease the friction coefficient and reduce wear loss during the application of NiTi alloy. The improvement of wear resistance can be attributed to the hard nitriding layer. |
| first_indexed | 2024-03-09T05:52:47Z |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T05:52:47Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-f62f0d22ceee46b3801e544ed533feab2023-12-03T12:16:33ZengMDPI AGApplied Sciences2076-34172021-01-0111251510.3390/app11020515The Effect of Laser Nitriding on Surface Characteristics and Wear Resistance of NiTi Alloy with Low Power Fiber LaserHao Wang0Ralf Nett1Evgeny L. Gurevich2Andreas Ostendorf3Chair of Applied Laser Technologies, Ruhr-Universität Bochum, 44801 Bochum, GermanyChair of Applied Laser Technologies, Ruhr-Universität Bochum, 44801 Bochum, GermanyLaser Center-LFM, Münster University of Applied Sciences, 48565 Steinfurt, GermanyChair of Applied Laser Technologies, Ruhr-Universität Bochum, 44801 Bochum, GermanyThe laser nitriding was performed in nitrogen gas at room temperature (20 °C) and low temperature (−190 °C) by a low power fiber laser to modify the wear and abrasion resistance of NiTi alloy. The surface roughness and element composition were analyzed by roughness device and energy-dispersive X-ray spectroscopy respectively. The results of roughness show that laser treatment can change the surface roughness due to the laser remelting. The effect of laser nitriding on the microhardness, friction coefficient, and worn scars of NiTi alloy was also studied, which shows that the microhardness of the NiTi alloy increases after laser nitriding. The optical microscope and scanning electron microscope were used to characterize the surface of NiTi alloy after wear testing to observe the microstructure of worn scars. The results show that the laser nitriding with different parameters can induce a nitride layer with different thicknesses and the higher energy deposition is the key factor for the formation of the nitride layer, which can decrease the friction coefficient and reduce wear loss during the application of NiTi alloy. The improvement of wear resistance can be attributed to the hard nitriding layer.https://www.mdpi.com/2076-3417/11/2/515laser nitridingwear resistanceNiTi alloyroughnessmicrohardness |
| spellingShingle | Hao Wang Ralf Nett Evgeny L. Gurevich Andreas Ostendorf The Effect of Laser Nitriding on Surface Characteristics and Wear Resistance of NiTi Alloy with Low Power Fiber Laser Applied Sciences laser nitriding wear resistance NiTi alloy roughness microhardness |
| title | The Effect of Laser Nitriding on Surface Characteristics and Wear Resistance of NiTi Alloy with Low Power Fiber Laser |
| title_full | The Effect of Laser Nitriding on Surface Characteristics and Wear Resistance of NiTi Alloy with Low Power Fiber Laser |
| title_fullStr | The Effect of Laser Nitriding on Surface Characteristics and Wear Resistance of NiTi Alloy with Low Power Fiber Laser |
| title_full_unstemmed | The Effect of Laser Nitriding on Surface Characteristics and Wear Resistance of NiTi Alloy with Low Power Fiber Laser |
| title_short | The Effect of Laser Nitriding on Surface Characteristics and Wear Resistance of NiTi Alloy with Low Power Fiber Laser |
| title_sort | effect of laser nitriding on surface characteristics and wear resistance of niti alloy with low power fiber laser |
| topic | laser nitriding wear resistance NiTi alloy roughness microhardness |
| url | https://www.mdpi.com/2076-3417/11/2/515 |
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