Abstract
Electron microscopy and X-ray diffraction have been used to investigate a nitrogen 07Kh17AG18 steel with an austenitic structure after the surface deformation treatment—ultrasonic forging. During ultrasonic forging, an austenitic structure transforms into a new structure with an elevated concentration of deformation-induced stacking faults, a lot of deformation microtwins, ε-martensite crystals. The austenite lattice parameter is found to be decreased in the surface layer. After ultrasonic forging, nitrided steel exhibits enhanced strength properties with retained high plasticity.
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Original Russian Text © N.A. Narkevich, A.I. Tolmachev, I.V. Vlasov, N.S. Surikova, 2016, published in Fizika Metallov i Metallovedenie, 2016, Vol. 117, No. 3, pp. 300–306.
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Narkevich, N.A., Tolmachev, A.I., Vlasov, I.V. et al. Structure and Mechanical Properties of Nitrogen Austenitic Steel after Ultrasonic Forging. Phys. Metals Metallogr. 117, 288–294 (2016). https://doi.org/10.1134/S0031918X16030108
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DOI: https://doi.org/10.1134/S0031918X16030108