PSI - Issue 14

Priti Kotak Shah et al. / Procedia Structural Integrity 14 (2019) 242–250 Priti et. al. / Structural Integrity Procedia 00 (2018) 000–000

249

8

300

250

200

150

J 0.2 (MPa)

100

50

J 0.2 Axial J 0.2 Trans

0

0

50

100 150 200 250 300

Temp ( o C)

0 C for axial and transverse notched specimens.

Fig. 12. Variation of toughness parameter J 0 . 2 between RT to 300

700

600

500

400

300

dJ/da (MPa)

200

100

dJ/da Axial dJ/da Trans

0

0

50

100 150 200 250 300

Temp ( o C)

Fig. 13. Variation of propagation toughness parameter dJ

da between RT to 300

0 C for axial and transverse notched specimens.

3. At higher temperatures, crack growth resistance increases for axial crack growth direction, while for transverse crack growth it remains nearly similar. This has been rationalized in terms of dominant transverse basal pole texture of the tubes.

Acknowledgements

The authors would like to thank Shri Ashish Sushibine, Shri H.N. Tripathi and Shri K.B. Gaonkar for their help in carrying out the experiments.

References

Bose, B., Klassen, R.J., 2011. Temperature Dependence of the Anisotropic Deformation of Zr-2.5Nb Pressure Tube Material During Micro Indentation. Journal of Nuclear Materials 419, 235–240.