Phase Field Modelling of Formation and Fracture of Expanding Precipitates

Reheman, Wureguli; Ståhle, Per; Durgé, Ellias; Singh, R.N.

doi:10.1016/j.prostr.2017.04.062

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2019

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“…Later Singh et al [20] computed the stress field assuming that predefined size of blister has grown in multiple steps. Reheman et al [21] simulated the growth of an expanding precipitate by using a phase field model considering coupled diffusion, precipitate formation and elastic-plastic deformation. However, they assumed that the matrix and the precipitate have the same mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Delayed hydride cracking of Zr-2.5%Nb pressure tube material due to partially constrained precipitates

Murty

Singh

Ståhle

2019

Journal of Nuclear Materials

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In Fig. 1(a) and (b) plot of KJ as a function of aspect ratio of oxide nodules for different depths using unirradiated and irradiated material properties is shown. Also depicted in this figure are the reported values of threshold stress intensity factors above which crack growth by Delayed Hydride Cracking is possible. It is evident form figures that in cases of unirradiated material, oxide nodules having aspect ratios less than two and depths more than 350 mm can initiate DHC whereas nodules having aspect ratios less than 2.5 and depths more than 200 mm can initiate DHC in irradiated material.

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Section: Introductionmentioning

confidence: 99%