Effect of Pulse Frequency on Microstructure, Friction and Wear Properties of Inconel 718 Coatings Prepared via Laser Cladding
The Inconel 718 alloy clad coating was successfully prepared via pulsed laser deposition. The effect of pulse frequency on the evolution of microstructure, hardness and tribological properties of the as-deposited samples were analyzed via scanning electron microscopy (SEM), microhardness tester and...
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MDPI AG
2023-06-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/13/7/986 |
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| author | Jun Wu Sheng Wang Donghang Li Hanwen Zhou Jianchen Cai Xiaohong Yang |
| author_facet | Jun Wu Sheng Wang Donghang Li Hanwen Zhou Jianchen Cai Xiaohong Yang |
| author_sort | Jun Wu |
| collection | DOAJ |
| description | The Inconel 718 alloy clad coating was successfully prepared via pulsed laser deposition. The effect of pulse frequency on the evolution of microstructure, hardness and tribological properties of the as-deposited samples were analyzed via scanning electron microscopy (SEM), microhardness tester and ball-on-plate tribometer. The results showed that with the decrease in pulse frequency, the cooling rate of molten pool increases gradually, which effectively refines the γ-(Ni, Cr, and Fe) dendrites and restrains Nb segregation. Hence, the morphology of the brittle Laves phase changed from long chained to granular and its volume fraction decreased from 6.59% to 2.41%. The hardness of the coating increased from 261 HV<sub>0.1</sub> to 297 HV<sub>0.1</sub> and the tribological property also improved simultaneously. The friction coefficient decreased from 0.2387 to 0.2066, and the wear rate decreased from 27.30 × 10<sup>−4</sup> mg·N<sup>−1</sup>·m<sup>−1</sup> to 19.15 × 10<sup>−4</sup> mg·N<sup>−1</sup>·m<sup>−1</sup>. It can also be observed that the wear area of the counterpart, Si<sub>3</sub>N<sub>4</sub> ball, increased from 2.016 mm<sup>2</sup> to 2.662 mm<sup>2</sup>. The increase in the hardness and tribological property were attributed to the grain refining strengthening. |
| first_indexed | 2024-03-11T01:10:47Z |
| format | Article |
| id | doaj.art-81c1bcbe934e4a6ca21640b50b7f4ffd |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-11T01:10:47Z |
| publishDate | 2023-06-01 |
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| series | Crystals |
| spelling | doaj.art-81c1bcbe934e4a6ca21640b50b7f4ffd2023-11-18T18:52:47ZengMDPI AGCrystals2073-43522023-06-0113798610.3390/cryst13070986Effect of Pulse Frequency on Microstructure, Friction and Wear Properties of Inconel 718 Coatings Prepared via Laser CladdingJun Wu0Sheng Wang1Donghang Li2Hanwen Zhou3Jianchen Cai4Xiaohong Yang5Department of Mechanical Engineering, Quzhou University, Quzhou 324000, ChinaMechanical and Electrical Engineering, Quzhou College of Technology, Quzhou 324000, ChinaDepartment of Mechanical Engineering, Quzhou University, Quzhou 324000, ChinaDepartment of Mechanical Engineering, Quzhou University, Quzhou 324000, ChinaDepartment of Mechanical Engineering, Quzhou University, Quzhou 324000, ChinaAcademician Expert Workstation, Jinhua Polytechnic, Jinhua 321017, ChinaThe Inconel 718 alloy clad coating was successfully prepared via pulsed laser deposition. The effect of pulse frequency on the evolution of microstructure, hardness and tribological properties of the as-deposited samples were analyzed via scanning electron microscopy (SEM), microhardness tester and ball-on-plate tribometer. The results showed that with the decrease in pulse frequency, the cooling rate of molten pool increases gradually, which effectively refines the γ-(Ni, Cr, and Fe) dendrites and restrains Nb segregation. Hence, the morphology of the brittle Laves phase changed from long chained to granular and its volume fraction decreased from 6.59% to 2.41%. The hardness of the coating increased from 261 HV<sub>0.1</sub> to 297 HV<sub>0.1</sub> and the tribological property also improved simultaneously. The friction coefficient decreased from 0.2387 to 0.2066, and the wear rate decreased from 27.30 × 10<sup>−4</sup> mg·N<sup>−1</sup>·m<sup>−1</sup> to 19.15 × 10<sup>−4</sup> mg·N<sup>−1</sup>·m<sup>−1</sup>. It can also be observed that the wear area of the counterpart, Si<sub>3</sub>N<sub>4</sub> ball, increased from 2.016 mm<sup>2</sup> to 2.662 mm<sup>2</sup>. The increase in the hardness and tribological property were attributed to the grain refining strengthening.https://www.mdpi.com/2073-4352/13/7/986laser claddingpulse frequencymicrostructurefriction and wear |
| spellingShingle | Jun Wu Sheng Wang Donghang Li Hanwen Zhou Jianchen Cai Xiaohong Yang Effect of Pulse Frequency on Microstructure, Friction and Wear Properties of Inconel 718 Coatings Prepared via Laser Cladding Crystals laser cladding pulse frequency microstructure friction and wear |
| title | Effect of Pulse Frequency on Microstructure, Friction and Wear Properties of Inconel 718 Coatings Prepared via Laser Cladding |
| title_full | Effect of Pulse Frequency on Microstructure, Friction and Wear Properties of Inconel 718 Coatings Prepared via Laser Cladding |
| title_fullStr | Effect of Pulse Frequency on Microstructure, Friction and Wear Properties of Inconel 718 Coatings Prepared via Laser Cladding |
| title_full_unstemmed | Effect of Pulse Frequency on Microstructure, Friction and Wear Properties of Inconel 718 Coatings Prepared via Laser Cladding |
| title_short | Effect of Pulse Frequency on Microstructure, Friction and Wear Properties of Inconel 718 Coatings Prepared via Laser Cladding |
| title_sort | effect of pulse frequency on microstructure friction and wear properties of inconel 718 coatings prepared via laser cladding |
| topic | laser cladding pulse frequency microstructure friction and wear |
| url | https://www.mdpi.com/2073-4352/13/7/986 |
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