Formation of Porous Structure with Subspot Size under the Irradiation of Picosecond Laser Pulses

Table 1

EDX elemental analysis of the stainless steel 304 surface. Measuring locations are given in Figure 2(a).

Spectrum (wt.%)	C	O	Si	Cr	Mn	Fe	Ni	Total
Spectrum 1	8.28	2.77	0.51	16.72	1.11	62.81	7.80
Spectrum 2	5.37	5.25	0.40	17.24	1.88	62.90	6.96	~100
Spectrum 3	2.26	7.97	0.48	18.07	2.33	62.70	6.18

(SEM SU-8010, voltage: 15.0 Kv, magnification: 10.0 Kx, count rate: 1434 cts).