Theoretical and experimental study of surface texturing with laser machining

• 作者: Ya-Zhou Mao Jian-Xi Yang Jin-Chen Ji
• 来源期刊: 先进制造进展（英文版）
• 年，卷（期）: 2021,（4）
• 页码范围: 538-557
• 页数: 20页
• 语种: 英文

摘要

To explore the forming process and mechanism of the surface texture of laser micropits,this paper presents the thermal model of laser machining based on the Neu-mann boundary conditions and an investigation on the effects of various parameters on the processing.The sur-face profile and quality of the formed micropits were analyzed using NanoFocus 3D equipment through a design of experiment (DOE).The results showed that more intense melting and splashing occurred with higher power density and narrower pulse widths.Moreover,the compressive stress is an important indicator of the damage effects,and the circumferential thermal stress is the primary factor influencing the diameter expansion.During the process of laser machining,not only did oxides such as CuO and ZnO generate,the energy distribution also tended to decrease gradually from region #1 to region #3 based on an energy dispersive spectrometer (EDS) analysis.The factors sig-nificantly affecting the surface quality of the micropit surface texture are the energy and pulse width.The rela-tionship between taper angle and energy is appropriately linear.Research on the formation process and mechanism of the surface texture of laser micropits provides important guidance for precision machining.