PSI - Issue 2_A

L.L. Meisner et al. / Procedia Structural Integrity 2 (2016) 1465–1472 L.L. Meisner et al./ Structural Integrity Procedia 00 (2016) 000 – 000

1471

7

they are formed mainly on oxide Ti 4 Ni 2 O x inclusions.

b

a

1

1

2

2

c

Spectra Ti

Ni

C

O

Ti/Ni

Spectra

Ti

Ni

C

O

Ti/Ni

before LEHCEBs

after LEHCEBs

1 2

~49 ~46

~30 ~17

1 2

~50 ~40 6

 LOD 0.93

 LOD 0.85  LOD 0.92

~45

2.6

~49 ~48

 LOD

 LOD

 LOD

Figure 7. SEM images of the surface area of commercial TiNi alloy before (with inclusions, a ) and after LEHCEBs irradiation (with craters, b ); the EDS data (10 keV) of the local element’s concentrations in the centers of inclusion 1 ( a ) and microcrater of type 1 ( b ), and in areas 2 without inclusions and, accordingly, microcraters ( c ).

a

b

1

2 3 4

5

1 2 3

c Spectra

Ti

Ni

O

Ti/Ni

Spectra

Ti

Ni

O

Ti/Ni

1

~46

~47

0.98

1 2 3 4 5

~45 ~46 ~ 52 ~45 ~45

~52 ~50 ~ 34 ~50 ~53

0.85 0.92

 LOD(~4)

 LOD(~2)

~5

2

~64

~24

~6

2.6

~ 12

1.5 0.9

~4 ~1

3

~45

~46

~5

0.98

0.84

Figure 8. SEM images of the surface area of precision TiNi alloy before (with inclusions, a ) and after LEHCEBs irradiation (with craters, b ); ( c ) the EDS data (10 keV) of the local element’s concentrations a cross the inclusion and microcrater of type 3 . 5. Conclusions 1. The morphology, phase and chemical compositions of the inclusions in commercial (VIM) and precision TiNi alloys were studied by TEM/SAED/EDS methods. It has been established that in commercial TiNi alloy