研究目的
Investigating the effect of fiber laser welding on solute segregation and properties of CoCrCuFeNi high entropy alloy.
研究成果
Fiber laser welding of CoCrCuFeNi high entropy alloy results in grain refinement and reduced Cu segregation in the fusion zone, leading to improved hardness and yield stress compared to the parent metal.
研究不足
The study is limited to the effects of fiber laser welding on CoCrCuFeNi high entropy alloy and does not explore other welding methods or alloys.
1：Experimental Design and Method Selection:
The study involved fiber laser welding of CoCrCuFeNi high entropy alloy to investigate its microstructure and mechanical properties post-welding.
2：Sample Selection and Data Sources:
High-purity cobalt, chromium, copper, iron, and nickel were used to prepare the alloy.
3：List of Experimental Equipment and Materials:
A MFSC-500 W fiber laser welding machine was used for welding.
4：Experimental Procedures and Operational Workflow:
The alloy was welded under specific parameters, and the microstructure and mechanical properties were analyzed using optical microscopy, XRD, SEM, and nanoindentation.
5：Data Analysis Methods:
The hardness and yield stress were measured and analyzed to understand the effects of welding on the alloy.
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scanning electron microscopy
Quanta? 250
FEI
Used to investigate the microstructure and chemical composition
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optical microscope
PMG3
Olympus Corporation
Used to observe the microstructure of the weld
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x-ray diffraction
D8 Advance
Bruker
Used to characterize the crystal structures of the specimens
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fiber laser welding machine
MFSC-500 W
Maxphotonics
Used for welding the CoCrCuFeNi high entropy alloy
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Vickers hardness tester
TMVS-1S
Aixtest
Used to record the hardness distribution
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nanoindentation tester
CPX + NHT2 + MST
CSM
Used to record the nanomechanical properties
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