Table 1 Statistical features of keyhole pore size, depth, and simulate energy absoptivity.

Mean keyhole depth (μm)

Exp.^a

355

388

456

–

Sim.^b

345

372

388

351

Mean keyhole pore size^c (μm)

37

49

82

–

s.d.^d of keyhole depth (μm)

Exp.^a

10

14

17

–

Sim.^b

30

29

35

37

Maximum fluctuation of keyhole depth^e (μm)

152

170

156

164

Absorptivity on front keyhole wall

Mean (%)

25.54

26.07

27.07

25.58

s.d.^d (%)

2.29

2.51

2.63

2.23

Absorptivity on rear keyhole wall

Mean (%)

50.04

49.88

49.04

50.40

s.d.^d (%)

3.02

3.26

4.21

2.75