Electron – beam treatment with 20 J/cm2 energy density of Fe-0.20C-23Cr-18Ni stainless steel increases
fatigue life up to 2.1 times. Fracture surface investigations have been carried out by the methods of
scanning and transmission diffraction electron microscopy and layer-by-layer analysis of structural phase
states and defect substructure of steel subjected to the multicyclic fatigue tests, has been made as well.
Nanosize (Cr,Fe)23C6 carbides formation and physical reasons of steel fatigue life increase by electron –
beam treatment have been found out.
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