Table 2 Printing parameters for linear-gradient and 90 wt.% P91 build fabricated using WAAM

From: Rapid data acquisition and machine learning-assisted composition design of functionally graded alloys via wire arc additive manufacturing

Build type

Layer No.

P91 content (wt.%)

Current (A)

Travel speed (mm/s)

Wire feed (m/min)

P91

740H

Linear gradient

25–40

0

166

5

-

2.44

23–24

10

166

5

0.31

2.19

22

20

166

5

0.63

1.95

21

30

166

5

0.94

1.70

20

40

166

5

1.26

1.46

19

50

166

5

1.57

1.22

18

60

166

5

1.88

0.97

17

70

166

5

2.20

0.73

16

80

166

5

2.51

0.49

13–15

90

166

5

2.83

0.24

3–12

100

166

5

3.10

-

2

100

200

4

2.90

-

1

100

220

3.5

2.90

-

90 wt.% P91

6–62

90

166

5

2.83

0.24

5

90

175

5

2.83

0.24

4

90

195

5

2.83

0.24

3

90

205

5

2.83

0.24

2

90

215

4

2.83

0.24

1

90

255

3.5

2.83

0.24