Effect of the hardened layer thickness of the formation of mesostructures during extension of surface hardened samples

We have made a systematic experimental study of the effect of the thickness of the surface hardened layer in planar samples of 65X13 steel on the geometric parameters of the quasiperiodic mesobustructures which are formed in the surface layer and the bulk of the sample during its plastic extension. The observed dependence of the dimensions of the fragments of mesosubstructure on the thickness of the surface hardened layer correlates well with theoretical calculations [1, 2] of the mechanical or thermal stress at the interface of two media in an external field. Institute of the Physics of Strength and Materials Science, Siberian Section, Russian Academy of Sciences. Tomsk Polytechnic University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 6, pp. 63–69, June, 1998.