Analysis of dislocation substructures evolution in austenite steels 08H18N10T (0.1C-18Cr-9Ni-1wt%Ti), 45G17Yu3 (0.45-C-17Mn-3wt%Al) during low-cycle and multicycle fatigue tests before failure was performed by transmission electron microscopy methods. Quantity dependences of dislocation scalar density changes, lattice curvature-torsion amplitude upon load cycles numbers were determined. It allowed to analyze the dislocation substructure transformation chains, and to determine the steel fatigue failure sources.

Ways of the Dislocation Substructure Evolution in Austenite Steel under Low and Multicycle Fatigue. A.V.Gromova, Y.F.Ivanov, S.V.Vorobyov, S.V.Konovalov, S.V.Gorbunov, V.E.Gromov: Procedia Engineering, 2010, 2[1], 83-90