Authors:
S. Fooladi Mahani (1), C. Liu (2), G. Ramírez (1,3), B.L. Liu (2), L. Lin (2), L. Llanes (1,3)
1- CIEFMA, Department of Materials Science and Engineering, Universitat Politècnica de Catalunya, Spain
2- Xiamen Tungsten Co., Ltd., China
3- Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Spain
Abstract:
Laser ablation is a proven method for post-processing fabrication, surface texturing, and micromachining hardmetal tools. In this regard, dimensional accuracy and surface integrity of shaped features are expected to depend on both processing parameters and microstructural assemblage. However, detailed information about such correlations is limited, especially concerning practical and cost-effective methods like short-pulse laser ablation. This study addresses this gap by shaping microfeatures on cemented carbide surfaces with different microstructures. In doing so, distinct laser processing parameters are optimized to accurately shape microdimples and through-thickness microgrooves. Advanced characterization techniques, including scanning electron microscopy and digital image correlation, are employed to investigate the surface integrity of these features. Results revealed that laser parameter alterations affect the geometry and dimensions of induced flaws more than a difference in microstructural characteristics. By elevating the input energy level on the surface through an increase in the number of passes and fluence, the depth of laser-formed defects can be significantly rised.
DOI:
https://doi.org/10.59499/EP246280715
