The change of the shear modulus of annealed and deformed Al due to the hydrogen ingress bas been shown to be stable at heating up to 1800 C and at ageing at RT. Hydrogen charging caused the active deformation of samples being under the creep condition, which continued even after the cessation of the hydrogen charging. The estimated activation volume of the hydrogen initiated creep depended on the mode of the initial deformation (elastic OT plastic). The obtained peculiar results cannot be fully explained and the formation of some transient stale preceding the hydride phase formation bas been supposed.
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