Table 1 Combinations of LPBF process parameters and post-HT conditions selected by the framework as iterations proceeded, and the corresponding UTS and TE values obtained through tensile tests

From: Active learning framework to optimize process parameters for additive-manufactured Ti-6Al-4V with high strength and ductility

Iteration and Sample Number

Printing Parameters

Measured Properties

Laser Power (W)

Scan Speed (mm/s)

Heating Temperature (°C)

Heating Time (h)

Volumetric Energy Density (J/mm3)

Ultimate Tensile Strength (MPa)

Total Elongation (%)

1

1-1

250

1100

900

2

94.69

1061 ± 27.5

18.3 ± 1.5

 

1-2

250

1150

900

2

90.57

1065 ± 17.0

16.3 ± 2.0

2

2-1

200

2000

595

2

41.66

1221 ± 18.0

12.9 ± 0.2

 

2-2

200

1950

595

2

42.73

1209 ± 8.0

12.2 ± 2.1

3

3-1

200

1850

595

2

45.04

1186 ± 9.0

16.4 ± 0.7

 

3-2

200

1900

595

2

43.85

1190 ± 12.4

16.5 ± 1.3

4

4-1

200

1700

595

2

49.01

1130 ± 13.0

17.6 ± 0.5

 

4-2

250

1750

595

2

47.61

1136 ± 4.0

14.7 ± 2.2

5

5-1

150

1500

595

2

41.66

1207 ± 10.2

12.9 ± 1.2

 

5-2

350

1450

0

0

100.0

1214 ± 21.5

8.64 ± 1.4

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