It is shown that an electron-beam treatment of the 08Х18Н10Т steel specimens under the condition of melting of the ~5 µm surface layer (electron beam energy density 25 J/cm 2 ) increases their fatigue life by a factor of 3.5. The structural-phase states and defect substructure of this steel are studied by the methods of optical, scanning and transmission electron microscopy, and the factors responsible for its increased fatigue life are revealed.

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