“…Hydride reorientation is influenced by properties inherent to the alloy such as the amount of cold work, grain microstructure, and crystallographic texture [3,4,[11][12][13][14]. In addition, the specific influences of thermomechanical parameters such as maximum temperature, dwell time at maximum temperature, cooling rate and number of cycles, and applied stress on the threshold stress for hydride reorientation have been extensively studied [8,9,[15][16][17][18][19]. However, although there is a significant amount of data on the value of the threshold stress to reorient the hydrides during cooling, most of it was obtained under uniaxial tension conditions [4,6,12,17,[20][21][22][23][24], whereas the internal gas pressure creates biaxial stress states with stress biaxiality ratios (r 2 /r 1 % 0.5) that are significantly higher than uniaxial tension (r 2 /r 1 ¼ 0).…”