Electron microscopy and emission Mössbauer spectroscopy were used to study grain boundaries in sub-microcrystalline molybdenum obtained by high-pressure torsion.

Mössbauer Spectroscopy of Grain Boundaries in Submicrocrystalline Molybdenum Obtained by Severe Plastic Deformation. V.V.Popov, G.P.Grabovetskaya, A.V.Sergeev, I.P.Mishin: The Physics of Metals and Metallography, 2008, 106[5], 490-4