PSI - Issue 60

P.A. Jadhav et al. / Procedia Structural Integrity 60 (2024) 631–654 P. A. Jadhav et.al. / Structural Integrity Procedia 00 (2019) 000 – 000

648 18

1.E-16 1.E-14 1.E-12 1.E-10 1.E-08 1.E-06 1.E-04 1.E-02 1.E+00 1.E-08 1.E-07 1.E-06 1.E-05 1.E-04 1.E-03 1.E-02 1.E-01 1.E+00

root radius = 10 microns root radius = 30 microns root radius = 50 microns root radius = 100 microns root radius = 200 microns root radius = 300 microns root radius = 400 microns root radius = 500 microns

_

20

30

40

50

H eq (ppm)

Fig. 14. The plot of _ with respect to the in main body of pressure tube (mean a/t = 4%, mean 2 = 2.875 mm, = 0 MPa)

residual stress = 0 MPa residual stress = 50 MPa residual stress = 100 MPa residual stress = 120 MPa

_

20

30

40

50

Heq (ppm)

Fig. 15. The plot of probability of leak and break with respect to the mean value of Hydrogen equivalent in the pressure tube. (mean a/t = 4%, mean 2 = 2.875 mm, = 30 microns) 4.2 The distribution of TWC