PSI - Issue 71

Tapan K. Sawarn et al. / Procedia Structural Integrity 71 (2025) 263–270

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(a)

(b)

(c)

Fig. 3. Typical appearances of the cladding tubes after 4PBT: Non-cracked (a) 1000°C & (b) 1100°C; Cracked from the burst opening tips (c) 1200°C.

Near Burst

Opposite to burst

1000°C

1000°C

Recrystallized Equiaxed α -Zr

Recrystallized equiaxed α -Zr

1100°C

1100°C

Recrystallized α -Zr

Prior β -Zr

Oxygen rich region

Oxide

1200°C