Abstract
Iron and copper single crystals were studied with the aid of the X-ray divergent beam method after various stages of cathodic polarization. The stress-strain analysis of the various stages of hydrogenation disclosed an anisotropy of strain distribution in the matrix. The maximum strain direction of the principal strain was found to coincide with one of the 〈111〉 directions for the iron crystal and one of the 〈100〉 directions for the copper crystal, respectively. The elastic stored energy occurring during the hydrogen absorption in the matrix increased with charging time. The strain distribution became highly assymmetric with time, especially in iron single crystals. The anisotropy was explained in terms of the formation of platelet segregation of hydrogen atoms in the matrix.
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