<div class="section abstract"><div class="htmlview paragraph">A method is proposed for estimating the stress field near a semi constrained
inclusion. The volume of the stress-free misfit inclusion was separated into
totally restricted and only loosely constrained parts. To achieve this, a
fictional notch mirroring the inclusion matrices was introduced, and misfit
displacement was applied. An elastic finite element analysis under a planar
stress condition was conducted to identify the stress field surrounding a
hydride blister in the Cr-3.5Ni pressure tube alloy. By assuming the orientation
of hydride platelets in the matrix, the precision of computations was
demonstrated. Our findings unveil distinct characteristics in the hydride
platelet's axial dimension and orientation, highlighting their resistance to
self-reorientation, even in the presence of radial hydrides. The consistent size
and spacing of hydride platelets around the blister, despite nearby radial
hydrides, emphasize the alloy's unique behavior. This study contributes
essential insights into the stress dynamics and microstructural intricacies of
hydride blister formation, crucial for ensuring the structural integrity of
pressure tubes in nuclear reactors.</div></div>