Microstructure and wear behavior of FeCoNiCrMn high entropy alloy coating deposited by plasma spraying

2020 ◽  
Vol 385 ◽  
pp. 125430 ◽  
Author(s):  
Jin-Kun Xiao ◽  
Hong Tan ◽  
Yu-Qing Wu ◽  
Juan Chen ◽  
Chao Zhang
Keyword(s):  
Plasma Spraying ◽  
Wear Behavior ◽  
Alloy Coating ◽  
High Entropy Alloy ◽  
High Entropy

Study on wear behavior of FeNiCrCoCu high entropy alloy coating on Cu substrate based on molecular dynamics

2021 ◽  
Vol 570 ◽  
pp. 151236
Author(s):  
Junye Li ◽  
Liguang Dong ◽  
Xiwei Dong ◽  
Weihong Zhao ◽  
Jianhe Liu ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Wear Behavior ◽  
Alloy Coating ◽  
High Entropy Alloy ◽  
Cu Substrate ◽  
High Entropy

Microstructure and elevated temperature wear behavior of laser-cladded AlCrFeMnNi high-entropy alloy coating

2022 ◽  
Vol 149 ◽  
pp. 107845
Author(s):  
Mina Zhang ◽  
Dafeng Wang ◽  
Longjun He ◽  
Xuyang Ye ◽  
Wentai Ouyang ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Wear Behavior ◽  
Alloy Coating ◽  
High Entropy Alloy ◽  
High Entropy

scholarly journals Microstructure and Corrosion Behavior of (CoCrFeNi)95Nb5 High-Entropy Alloy Coating Fabricated by Plasma Spraying

Materials ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 694 ◽  
Author(s):  
Wenrui Wang ◽  
Wu Qi ◽  
Lu Xie ◽  
Xiao Yang ◽  
Jiangtao Li ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Plasma Spraying ◽  
Steel Substrate ◽  
Alloy Coating ◽  
High Entropy Alloy ◽  
Pitting Potential ◽  
Q235 Steel ◽  
High Entropy ◽  
Passivation Film ◽  
Elemental Segregation

In this paper, the (CoCrFeNi)95Nb5 high-entropy alloy (HEA) coating with a thickness of 500 μm on Q235 steel substrate was fabricated by plasma spraying. The microscopic results showed that a new Laves phase is formed in the (CoCrFeNi)95Nb5 HEA coating compared to the HEA powder, and elemental segregation occurs between the dendrites and the interdendrites of the coating, while the interdendritic phase enriches with the Cr and Nb. The phase composition change and elemental segregation behavior were mainly due to the faster cooling rate of the plasma spraying technique. At the junction of the coating and the substrate, the HEA coating bonded well to the substrate; in addition, the width of transition zone was merely 2 μm. The microhardness of the (CoCrFeNi)95Nb5 HEA coating was 321 HV0.5, which is significantly higher than that of the substrate. In terms of corrosion resistance, the (CoCrFeNi)95Nb5 HEA coating has good corrosion resistance in NaCl solution. Although the corrosion form was pitting corrosion, the pitting potential of the (CoCrFeNi)95Nb5 HEA coating was significantly higher than that of other coatings, which was mainly because of the dense passivation film formed by Cr and Nb on the surface of the coating. Once the passivation film was destroyed by Cl−, the selective corrosion occurred on the surface of the (CoCrFeNi)95Nb5 HEA coating. In summary, the (CoCrFeNi)95Nb5 HEA coating prepared by plasma spraying technology can significantly improve the corrosion resistance and mechanical properties of the Q235 steel substrate.

FABRICATION AND WEAR BEHAVIOR ANALYSIS ON AlCrFeNi HIGH ENTROPY ALLOY COATING UNDER DRY SLIDING AND OIL LUBRICATION TEST CONDITIONS

2016 ◽  
Vol 23 (04) ◽  
pp. 1650018 ◽  
Author(s):  
YIPIN TANG ◽  
SHOUREN WANG ◽  
BIN SUN ◽  
YAN WANG ◽  
YANG QIAO
Keyword(s):  
Hot Pressing ◽  
Solution Structure ◽  
Wear Behavior ◽  
Alloy Coating ◽  
High Entropy Alloy ◽  
Dry Sliding ◽  
High Entropy Alloys ◽  
Oil Lubrication ◽  
High Entropy ◽  
Hot Pressing Sintering

In this paper, AlCrFeNi high entropy alloy coating was fabricated on the surface of Q235 steel using hot pressing sintering process. The coating has the controlled thickness size and excellent mechanical properties. Scanning electron microscopy (SEM), XRD and hardness testing method were used to study the morphology, phase structure and hardness of high entropy alloys coating. The lattice distortion plays a significant role in increasing the hardness. Coating formation mechanism caused by the element diffusion under the hot pressing effect is also discussed in the paper. Simultaneously, the dry sliding and oil lubrication wear tests, wear morphology observation and wear mechanism discussion were completed. As the result shows, AlCrFeNi high entropy alloys coating exhibits superior wear resistance either at dry sliding or oil lubrication tests owing to its hard high entropy solid solution structure.

scholarly journals Effect of Laser Remelting on Wear Behavior of HVOF-Sprayed FeCrCoNiTiAl0.6 High Entropy Alloy Coating

2020 ◽  
Vol 10 (20) ◽  
pp. 7211
Author(s):  
Lijia Chen ◽  
Dingyong He ◽  
Bing Han ◽  
Zhen Guo ◽  
Li Zhang ◽  
...  
Keyword(s):  
Wear Behavior ◽  
Alloy Coating ◽  
High Entropy Alloy ◽  
Laser Remelting ◽  
Hvof Coating ◽  
X Ray ◽  
High Entropy ◽  
Confocal Scanning Laser Microscope ◽  
Confocal Scanning ◽  
Confocal Scanning Laser

In this study, a laser remelting process was applied to the FeCrCoNiTiAl0.6 high entropy alloy coating in order to improve the density and the surface quality of the coating. The coating was fabricated by high-velocity-oxygen-fuel (HVOF) technology. The microstructure and phase composition of the coating were investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectrometer (EDS), X-ray diffractometer (XRD) and confocal scanning laser microscope (CSLM). Moreover, the wear behavior of the coating was evaluated by use of a ball-on-disc test. The coating was denser after laser remelting treatment by eliminating the previous lamellar structure. The microstructure of the laser-remelted coating exhibits two body-centered cubic (BCC) phases, which is different from the HVOF coating. In addition, aluminum oxide formed during laser remelting. Different from the wear mechanism of the HVOF coating, which comprised abrasion and fatigue, the major wear of the laser remelted coating was abrasion.

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