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Microstructure and Friction Properties of $CoCrFeMnNiTi_{x}$ High-Entropy Alloy Coating by Laser Cladding
| Content Provider | MDPI |
|---|---|
| Author | Liu, Pengfei Si, Wudong Zhang, Dabin Dai, Sichao Jiang, Benchi Shu, Da Wu, Lulu Zhang, Chao Zhang, Meisong |
| Copyright Year | 2022 |
| Description | To enhance the friction and wear properties of 40Cr steel’s surface, CoCrFeMnNi high-entropy alloy (HEA) coatings with various Ti contents were prepared using laser cladding. X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) were used to characterize the phase composition, microstructure, and chemical composition of the samples. The findings demonstrated that the $CoCrFeMnNiTi_{x}$ HEA coatings formed a single FCC phase. $Fe_{2}$Ti, $Ni_{3}$Ti, and $Co_{2}$Ti intermetallic compounds were discovered in the coatings when the molar ratio of Ti content was greater than 0.5. The EDS findings indicated that Cr and Co/Ni/Ti were primarily enriched in the dendrite and interdendrite, respectively. Ti addition can effectively enhance the coating’s mechanical properties. The hardness test findings showed that when the molar ratio of Ti was 0.75, the coating’s microhardness was 511 HV0.5, which was 1.9 times the hardness of the 40Cr (256 HV0.5) substrate and 1.46 times the hardness of the CrCrFeMnNi HEA coating (348 HV0.5). The friction and wear findings demonstrated that the addition of Ti can substantially reduce the coating’s friction coefficient and wear rate. The coating’s wear resistance was the best when the molar ratio of Ti was 0.75, the friction coefficient was 0.296, and the wear amount was 0.001 g. SEM and 3D morphology test results demonstrated that the coating’s wear mechanism changed from adhesive wear and abrasive wear to fatigue wear and abrasive wear with the increase in Ti content. |
| Starting Page | 4669 |
| e-ISSN | 19961944 |
| DOI | 10.3390/ma15134669 |
| Journal | Materials |
| Issue Number | 13 |
| Volume Number | 15 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-07-03 |
| Access Restriction | Open |
| Subject Keyword | Materials Coatings and Films Laser Cladding High-entropy Alloy Cocrfemnniti Microstructure Friction and Wear |
| Content Type | Text |
| Resource Type | Article |
