研究目的
Investigating the effects of ultrasonic assisted laser cladding on the microstructure and mechanical properties of Al2O3–ZrO2 ceramic coatings on titanium alloy substrate.
研究成果
The ultrasonic assisted laser cladding method improves the microstructure and mechanical properties of Al2O3–ZrO2 ceramic coatings on titanium alloy substrates. The coatings exhibit finer grains, reduced cracks, and enhanced micro-hardness and wear resistance compared to those without ultrasonic assistance.
研究不足
The study is limited to the effects of ultrasonic assisted laser cladding on Al2O3–ZrO2 ceramic coatings on titanium alloy substrates. The applicability of the method to other materials or larger workpieces is not explored.
1：Experimental Design and Method Selection:
The study employs ultrasonic assisted laser cladding to fabricate Al2O3–ZrO2 ceramic coatings on titanium alloy substrates. Ultrasonic waves are directly applied to the micro-zone of the molten pool to investigate their effects on the coatings' microstructure and mechanical properties.
2：Sample Selection and Data Sources:
The substrate material is Ti-6Al-4V, machined into cubic plates. The coating material is a mixture of Al2O3 and ZrO2 powders. The chemical composition of the substrate and the particle size of the powders are specified.
3：List of Experimental Equipment and Materials:
The experimental setup includes an ultrasound system, operating system, and laser system. The ultrasonic parameters are detailed, including frequency, power, amplitude, and vibration signal. The laser cladding is conducted in an Argon gas shielded atmosphere.
4：Experimental Procedures and Operational Workflow:
The substrate is prepared by abrasion and cleaning before cladding. The coating material is pre-placed on the substrate, and laser cladding is performed with and without ultrasonic assistance under various laser powers.
5：Data Analysis Methods:
The microstructure and mechanical properties of the coatings are analyzed through SEM imaging, micro-hardness testing, and wear resistance tests.
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