PSI - Issue 71

Priti Kotak Shah et al. / Procedia Structural Integrity 71 (2025) 271–278

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10 15 20 25 30 35

0 5

Break Strain (%)

As-Fab HydRim1 HydRim2 HydUni1 HydUni2 HydUni3

Condition of Clad Tube

Fig.7. Bar chart showing variation in break strain for different clad specimens obtained in RTT

3.2. Ring Compression test Typical load-displacement plots obtained for various clad specimens are shown in Fig. 8. Yield strength has been evaluated from RCT using different collapse load calculations, as shown in Fig. 9. Hydrided specimens with 780 wppm and 1200 wppm broke into two pieces during compression test. The bar chart for total deflection, plastic deflection, yield strength using various collapse load and bar charts for area under the curve and evaluated modulus are shown in Fig. 10 to Fig. 17.

Fig.8. Load-displacement curves obtained in ring compression test of different clad tube samples

Fig.9. Part of load-displacement plot showing various points used for different types of yield strengths calculation

Fig. 10 and Fig. 11 show the total deflection and plastic deflection plot respectively. We see that for uniformly hydided specimens, both the deflections reduce with increase in hydrogen concentration. The rimmed samples however do not show any change from as fabricated samples.

10.0 12.0 14.0

0.0 2.0 4.0 6.0 8.0

As-fab HydRim1 HydRim2 HydUni1 HydUni2 HydUni3

Total deflection (mm)

Condition of Clad Tube

Fig.10. Bar chart showing variation of total deflection for different clad specimens