研究目的
To determine material-specific parameters for ultra-short pulsed laser ablation of cemented carbide, enabling optimal choice of machining parameters and prediction of the ablation process.
研究成果
The introduced method effectively determines the threshold fluence and penetration depth for ultra-short pulsed laser ablation of cemented carbide at various angles of incidence. The results enable the prediction of angular dependent ablation volume and rate, showcasing the method's potential for optimizing laser machining parameters.
研究不足
The method's applicability is limited by the need for precise measurement of small ablation craters and the assumption of metallic behavior in the ablation process. The technique may not be directly applicable to materials with significantly different optical properties.
1：Experimental Design and Method Selection:
The methodology involves diameter reductions of round rods made of cemented carbide using ultra-short pulsed laser technology. The Neuenschwander model is modified to consider inclined incidence for predicting ablation behavior.
2：Sample Selection and Data Sources:
Round rods of cemented carbide with a radius of 1.5 mm and a length of about 30 mm were used. Diameter reductions were performed at different angles of incidence and pulse energies.
3：5 mm and a length of about 30 mm were used. Diameter reductions were performed at different angles of incidence and pulse energies.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: A modern 8-axis laser machining center with a built-in USP laser (maximum average power of 50 W at a wavelength of 1064 nm) was used.
4：Experimental Procedures and Operational Workflow:
Diameter reductions were performed at constant angles of incidence with varying pulse energies, creating a stepped ablation profile. The angle of incidence was varied in steps of 5° between 0° and 77.5°.
5：5°.
Data Analysis Methods:
5. Data Analysis Methods: A confocal 3D microscope was used to measure the contour of the diameter reductions. The ablation depth and volume were analyzed for each step, and material parameters were determined using the modified Neuenschwander model.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
