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, †,}

Phenomena of melt ejection at moments of: 235 μs ((a), (e)), 470 μs ((b), (f)), 704 μs ((c), (g)), and 939 μs ((d), (h)); for 304 SS ((a)–(d)) and aluminum ((e)–(h)) under 5.71 MW/cm² laser power density irradiation and 1 ms pulse duration.