Analysis of melt ejection during long pulsed laser drilling

Zhang Ting-Zhong¹, Jia Zhi-Chao¹, Cui Hai-Chao², Zhu De-Hua³, Ni Xiao-Wu¹, Lu Jian^{1, †,}

Optical microscope images of a drilled hole showing material removal from the hole in the melt phase for (a) 304 SS and (b) aluminum. Drilling conditions are the same as those in Fig. 8.