标题：Nanosecond laser direct-part marking of Data Matrix symbols on titanium alloy substratres
作者：Li, Chunling ;Lu, Changhou ;Li, Jianmei
作者机构：[Li, Chunling ;Lu, Changhou ;Li, Jianmei ] Key Laboratory of High-Efficiency and Clean Mechanical Manufacture, Ministry of Education, School of Mechan 更多
来源：Key Engineering Materials
关键词：Data Matrix symbol; Laser marking; Nd: YAG laser; Titanium alloy
摘要：In the application of laser marking, the biggest challenge is that machine-readable barcodes with superior quality were not marked consistently. To solve this problem, laser direct-part marking Data Matrix barcode experiments were carried out on titanium alloy substrates, using a Q-switched light-pumped Nd: YAG laser. The microstructure of the symbols was analyzed using an environmental scanning electron microscope (ESEM). The internal micro-stresses of the marked areas were analyzed using X-ray diffractometer (XRD). The influence of the pulse frequency on the symbol contrast is analyzed. Results showed the interaction between the laser and the titanium alloy can be found. This can further explain the physical mechanism of laser direct part marking Data Matrix symbols on titanium alloy substrates. © 2018 Trans Tech Publications, Switzerland.