Table 1 Compositions (in at.%) of α and β phases in 10 mm and 20 mm samples obtained from APT data as well as the partitioning ratio of each element.

From: Revealing martensitic transformation and α/β interface evolution in electron beam melting three-dimensional-printed Ti-6Al-4V

 

Sample

Ti

σ (Ti)

Al

σ (Al)

V

σ (V)

Fe

σ (Fe)

O

σ (O)

C

σ (C)

N

σ (N)

H

σ (H)

α

10 mm

85.15

0.13

10.49

0.12

2.65

0.06

0.16

0.02

0.41

0.02

0.03

0.01

0.12

0.01

0.99

0.04

20 mm

87.02

0.14

9.41

0.12

2.57

0.07

0.16

0.02

0.42

0.03

0.03

0.01

0.18

0.02

0.20

0.02

β

10 mm

68.22

0.18

3.13

0.07

23.68

0.16

3.28

0.07

0.24

0.02

0.03

0.01

0.13

0.01

1.29

0.04

20 mm

65.66

0.21

2.32

0.07

27.43

0.20

3.34

0.08

0.20

0.02

0.03

0.01

0.16

0.02

0.86

0.04

k or k′

10 mm

1.2

 

3.4

 

8.9

 

20.5

 

1.7

 

1.0

 

1.1

 

1.3

 

20 mm

1.3

 

4.1

 

10.7

 

20.9

 

2.1

 

1.0

 

1.1

 

4.3

 
  1. The partitioning ratio k (for α-partitioning elements) or k′ (for β-partitioning elements) were defined as or k = Cα/Cβ or k′ = Cβ/Cα, respectively. The larger than unity for k or k′, the severer partitioning for the corresponding element.
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