Finite element calculations of the accommodation energy of a misfitting precipitate in an elastic-plastic matrix

Temperature dependence of misfit strains of δ-hydrides of zirconium

“…The volumetric misfit strain for ␦-ZrH 1.66 increases from 17.26% at 298 K to 19.29% at 573 K and the corresponding value for ␦-ZrD 1.66 are 16.66% and 18.67%, respectively. These differences in the volumetric strain for the formation of hydride and deuteride phase can have significant influence on the accommodation energy as the latter is a function of square of the misfit strain [4][5][6].…”

“…Misfit strains govern the strain energy associated with the accommodation of hydrides in ␣-Zr matrix [4], which is reported to be the basis for the large hysteresis associated with terminal solid solubility of hydrogen in Zr-alloys [5,6]. Misfit strains, also called stress free transformation strains or dilatational strains, is an important parameter in theoretical modeling of hydride embrittlement phenomena [7] such as stress-reorientation [8], delayed hydride cracking (DHC) [9] and hydride blister formation [10].…”

Stress field estimation around a semi-constrained inclusion and its validation by interpreting hydride platelet orientation around a blister in a Zr–2.5Nb alloy

“…to d-hydride is accompanied by Â/17% positive volume change [22], the unconstrained volume of the hydride blister will be 1.17V a . For a semi-ellipsoidal geometry of radius b and depth a, we have…”

Microstructural studies on phase evolution sequence in rapidly solidified Zr3Al based binary and ternary alloys

“…Reduction in the particle spacing increases the strain and below a certain particle spacing (L < 2a) the strain increases beyond the elastic limit. At this point linear elasticity theory breaks down and analysis needs to be done using elastic-plastic models [8]. It can be inferred from this analysis that for any spacing less than 2a the strain would be large enough to disintegrate the cuboid.…”