Abstract
The structure, distribution of elastic microdeformations related to the effect of residual stresses of the 1st and 2nd kind in nitrogen austenite coatings prepared by electron-beam overlaying and the mechanisms of relaxation of residual stresses in the substrate-coating system have been investigated. The state of stress is characterized by a change in sense over the coating thickness. An analysis of experimental data shows that the relaxation of residual stresses results in the formation of a structure with an enhanced density of dislocations. The main mechanism of relaxation of residual stresses in overlaid coatings is microtwinning and γ → ɛ transformation.
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Original Russian Text © N.A. Narkevich, E.A. Ivanova, Yu.P. Mironov, A.I. Smirnov, V.G. Durakov, D.N. Tagil’tseva, 2011, published in Fizika Metallov i Metallovedenie, 2011, Vol. 112, No. 5, pp. 521–528.
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Narkevich, N.A., Ivanova, E.A., Mironov, Y.P. et al. Residual stresses in electron-beam coatings with a nitrogen-austenite matrix and structural mechanisms of their relaxation. Phys. Metals Metallogr. 112, 495–502 (2011). https://doi.org/10.1134/S0031918X11050267
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DOI: https://doi.org/10.1134/S0031918X11050267