The Effect of Microstructure on Delayed Hydride Cracking Behavior of Zircaloy-4 Fuel Cladding—An International Atomic Energy Agency Coordinated Research Program

Coleman, C.E.; Grigoriev, V.; Inozemtsev, V.; Markelov, V. A.; Roth, M.; Makarevičius, Vidas; Kim, Y. S.; Ali, Kanwar Liaqat; Chakravartty, J.K.; Mizrahi, R.; Lalgudi, R.

doi:10.1520/stp49372s

Cited by 1 publication

(2 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As expected, the crack growth rate decreases with increasing temperature due to the slower diffusion of hydrogen from the bulk to the crack tip and the lower amount of diffusible hydrogen available at lower temperatures. with results from the literature on Zircaloy-4 tubes (Coleman et al, 2012;IAEA, 2010) and Zircaloy-2 tubes (Sakamoto et al, 2008;Kubo et al, 2012;Huang and Mills, 1991).…”

Section: Determination Of the Dhc Velocitymentioning

confidence: 56%

See 1 more Smart Citation

Assessing the Fracture Toughness of Zircaloy-4 Fuel Rod Cladding Tubes: Impact of Delayed Hydride Cracking

Francois,

Petit,

Auzoux

et al. 2023

Preprint

View full text Add to dashboard Cite

Delayed Hydride Cracking (DHC) is a hydrogen embrittlement phenomenon that may potentially occur in Zircaloy-4 fuel claddings during dry storage conditions. An experimental procedure has been developed to measure the toughness of this material in the presence of DHC by allowing crack propagation through the thickness of a fuel cladding. Notched C-ring specimens, charged with 100 wppm of hydrogen, were used and pre-cracked by brittle fracture of a hydrided zone at the notch root at room temperature. The length of the pre-crack was measured on the fracture surface or cross-sections. Additionally, a finite element model was developed to determine the stress intensity factor as a function of the crack length for a given loading. Two types of tests were conducted independently to determine the fracture toughness with and without DHC, KIDHC and KIC, respectively: (i) constant load tests %after a thermal cycle at 150°C, 200°C, and 250°C; (ii) monotonic tests at 25°C, 200°C, and 250°C. The results indicate the following: (1) there is no temperature influence on the DHC toughness of Zircaloy-4 between 150 and 250°C (KIDHC ∈ [7.2;9.2] MPa.m1/2), (2) within this temperature range, the fracture toughness of Zircaloy-4 is halved by DHC (KIC ∈ [16.9;19.7] MPa.m1/2), (3) the crack propagation rate decreases with decreasing temperature and (4) the time before crack propagation increases as the temperature and loading decrease.

show abstract

Section: Determination Of the Dhc Velocitymentioning

confidence: 56%

“…Fig.16: Comparison of the evolution of v DHC obtained in this study as a function of the temperature with results from the literature on Zircaloy-4 tubes(Coleman et al, 2012; IAEA, 2010) and Zircaloy-2 tubes(Sakamoto et al, 2008; Kubo et al, 2012;Huang and Mills, 1991).…”

mentioning

confidence: 68%