Types of mechanical relaxation by hydrogen in intermetallic compounds

Hydrogen diffusion in Ti–Nb45 at high hydrogen contents

“…[5,6,9,13]). Some years ago an "intercrystalline Gorsky effect" was found by anelastic relaxation studies of hydrogen in intermetallic compounds [14][15][16]. The origin of this effect lies in internal mismatch stresses between elastically anisotropic crystallites in a polycrystal.…”

The intercrystalline Gorsky effect

“…1; the IGE (marked by thick lines) must be distinguished here from the reorientation peaks at lower temperatures which were discussed elsewhere for CoZr 2 [12,15] and CuZr 2 [5,16], respectively. For the latter phase, the full peak of the IGE can only be seen if the grain size is reduced by alloying (Fig.…”

“…Again more than 30 years later, an intercrystalline version of the Gorsky effect was discovered recently as the source of some previously unexplained hydrogen damping peaks in polycrystalline intermetallic compounds [5,6]. Causing damping effects above room temperature (at sufficiently small grain sizes), this "intercrystalline Gorsky effect" (IGE) fills the kinetic gap between the classical types of short-and long-range interstitial relaxation mentioned above.…”

H-induced anelasticity as a probe: Application to nanoscale quasicrystals

“…1c. Moreover, different mechanisms were identified in this latter case [8,23], like a Zener mechanism (reorientation of H-H pairs [24]) for the central peak and a long-range diffusion mechanism (intercrystalline Gorsky effect [9,25]) for the broad high-temperature peak. The latter mechanism requires an elastically anisotropic structure and should, consequently, not exist in amorphous or icosahedral phases.…”

“…Historically, it was the unexpected absence of the Snoek relaxation of hydrogen in pure bcc metals [1] (in contrast to the heavier interstitials C, N, O), which raised new questions and stimulated fundamental research on the nonclassical behavior of hydrogen especially in bcc metals. But this vain search for the "pure" hydrogen Snoek effect also marked the beginning of a still continuing discovery of new kinds of H-induced anelastic relaxation ("Snoek-type" and others) in different crystalline, amorphous, and recently also quasicrystalline host structures (see, for instance, reviews [2][3][4][5][6] and recent original papers [7][8][9][10][11][12][13][14]). …”