Structure and Mechanical Properties of Nitrogen Austenitic Steel after Ultrasonic Forging

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 concentrati...

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Bibliographic Details
Published in:Physics of metals and metallography 2016-03, Vol.117 (3), p.288-294
Main Authors: Narkevich, N. A., Tolmachev, A. I., Vlasov, I. V., Surikova, N. S.
Format: Article
Language:English
Subjects:
Austenitic stainless steels
Chemistry and Materials Science
Deformation
Diffraction
Forging
Magnetization
Materials Science
Mechanical properties
Metallic Materials
Metallography
Microtwins
Stacking faults
Strength and Plasticity
Structural steels
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Summary: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.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X16030108