Hierarchical microtextures generated by pulsed-laser manufacturing for surface geometry modulation

作者：Jin, Xiandi; Zheng, Yi; Zhang, Yanhu^*; Chen, Zhihao; Duan, Xuefei; Fu, Hao; Ji, Jinghu; Yang, Zhengbao; Hua, Xijun; Fu, Yonghong

来源：Journal of Manufacturing Processes, 2023, 97: 148-158.

DOI：10.1016/j.jmapro.2023.04.068

• Laser surface texturing
• Temperature and phase transition
• Geometry control
• Evolvement rule

Enduring surface technologies draw much attention to improving friction performance and prolonging the lifespan of multi-alternative contact pairs. Laser surface texturing is smart to modify effectively the microscopic surface geometries and mechanical performances for the service's improvement of friction pair. This study explored the formation mechanisms and morphology evolution of hierarchical microtextures, with a focus on the thermal field and phase transformation resulting from the laser heating effect on the alloy surface. The con-trolling variates of laser machining were analyzed considering their influences on microtextures' height and diameter, the pulse numbers are 3 times and 1.7 times of the unit laser power, 81 times and 82.5 times of the unit pulse width. We contributed to the development of laser manufacturing techniques for creating hierarchical microtextures' controllable morphology and smart surface design for tribology engineering and energy man-agement applications.

• 单位
  江苏大学