We investigate the formation of the first portions of strain-induced martensite in plastic uniaxial compression of 12Kh18N10T and 12Kh18N9T steels in which δ-ferrite is absent and present, respectively, in the initial state. The true deformation martensitic points ε s are experimentally determined. It is established that, in 12Kh18N10T steel, there exist one-phase (A) and two-phase (A + M) states for ε < ε s and ε > ε s , respectively, whereas, in 12Kh18N9T steel, there exist two-phase (A + F) and three-phase (A + F + M) states for ε < ε s and ε > ε s , respectively. The effect of increase in the magnetization of paramagnetic austenite before the formation of strain-induced martensite is detected.
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Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 47, No. 3, pp. 84–89, May–June, 2011.
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Snizhnoi, H.V. Formation of strain-induced martensite in chromium–nickel steels of the austenitic class. Mater Sci 47, 363–369 (2011). https://doi.org/10.1007/s11003-011-9404-7
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DOI: https://doi.org/10.1007/s11003-011-9404-7