研究目的
To improve microhardness and erosion rate of AA1050 aluminium substrate by synthesizing AlxCu0.5FeNiTi high entropy alloy coating using laser surface alloying.
研究成果
The study successfully synthesized AlxCu0.5FeNiTi high entropy alloy coating on AA1050 aluminium substrate using laser surface alloying. The coating exhibited a mixture of disordered BCC and two FCC solid solution phases, leading to significant improvements in microhardness and erosion resistance. The maximum microhardness achieved was 740 HV, which is 18 times that of the substrate. The erosion resistance was also notably improved, making the coating suitable for harsh tribological applications.
研究不足
The study focuses on the AlxCu0.5FeNiTi high entropy alloy system and its application on AA1050 aluminium substrate. The findings may not be directly applicable to other substrate materials or alloy systems.
1：Experimental Design and Method Selection
Laser surface alloying was used to synthesize AlxCu0.5FeNiTi high entropy alloy coating on AA1050 aluminium substrate. The process parameters were optimized using multi-objective optimization.
2：Sample Selection and Data Sources
Commercial aluminium alloy (AA1050) was used as the substrate. Powder precursors of Cu, Fe, Ni, and Ti with particle size 45-105 μm were used for alloying.
3：List of Experimental Equipment and Materials
2 kW fiber laser (YLS-2000; IPG Photonics Company), co-axial powder feeder system with Argon gas, X-ray diffractometer (Rigaku; Smart Lab), Scanning Electron Microscope (EVO 50; Carl Zeiss), Vickers Microhardness tester (Radical), air jet erosion setup (TR-471-900; Ducom).
4：Experimental Procedures and Operational Workflow
The sample was developed at optimum values of input process parameters: laser power=2000W, scan speed=0.4m/min, and powder feed rate=2g/min. Microstructure and mechanical properties were analyzed using XRD, SEM, and microhardness tester. Erosion behavior was tested using an air jet erosion setup.
5：Data Analysis Methods
Phase constituents and microstructure were analyzed using XRD and SEM. Microhardness was measured using a Vickers Microhardness tester. Erosion rate was calculated based on mass loss.
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fiber laser
YLS-2000
IPG Photonics Company
Used for laser surface alloying to synthesize high entropy alloy coating.
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X-ray diffractometer
Smart Lab
Rigaku
Used to examine the crystal structure of the alloyed coating.
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Scanning Electron Microscope
EVO 50
Carl Zeiss
Used to analyze the microstructure of the alloyed coating.
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Vickers Microhardness tester
Not specified
Radical
Used to measure the microhardness of the alloyed coating.
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air jet erosion setup
TR-471-900
Ducom
Used to test the erosion behavior of the alloyed coating.
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