Multi-physics modeling of delayed hydride cracking in zirconium alloys

Simulation of hydrogen embrittlement of steel using mixed nonlocal finite elements

“…(Benannoune et al, 2019). Accounting for trapping/detrapping kinetics is also important in the case of hydrogen in zirconium alloys, where trapping and detrapping respectively correspond to hydride precipitation and dissolution (Xia et al, 2019). The trapping sites are assumed to be dislocations, so that the trapping density can be expressed as (Taha and Sofronis, 2001;Shibata et al, 2021):…”

“…Specifically, a damage mechanism that is influenced by the hydrogen concentration must be implemented to simulate the accelerated evolution of damage. The cohesive zone modeling (CZM) is a popular approach employed in several studies on hydrogen embrittlement simulations at the continuum level (Ahn et al, 2007;Xia et al, 2019;Olden et al, 2008;Jemblie et al, 2017;Xia et al, 2019). In this model, cohesive elements are introduced along a predefined crack path.…”

Spent nuclear fuel in dry storage conditions – current trends in fuel performance modeling

“…However, numerous models have been developed to study DHC in zirconium-based materials at different scales. It is worth to mention the model based on the extended finite element method developed by Suman et al [98,99] or the multi-physics modeling done by Xia et al [100]…”

Zirconium hydride phase mapping in Zircaloy-2 cladding after delayed hydride cracking

“…Recent literature has reported on various dependencies of DHC hydride precipitation showing the hydrogen concentration gradients around DHC cracks with neutron radiography measurements [15] as well as multi-physics modeling [26,27], giving hints to possible changes in phases or precipitation kinetics. As the temperature range which DHC can occur encompasses the precipitation temperatures for both δ and ɣ phases [28], a change in the mechanical properties between different hydride phases, like fracture toughness [22], could lead to a change in mechanical stability of the overall system depending on the temperature.…”