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- W155571018 abstract "The effect of neutron irradiation (NI) on martensite transformation (T) was investigated on five types of steel containing respectively: 0.48% C, 7.7% Mn, 2.2% Cu (steel 50G8); 1.4% C, 4.0% Mn (steel 140G4); 0.50% C, 21.0% Ni (steel 50N21); 0.025% C, 22.7% Ni, 2.88% Mn (steel N23G3); 0.020% C, 22.4% Ni, and 3.48% Ma (steel N22G3). The effect of NI was evaluated by the change of progress of the martensite curves during cooling of specimens to a temperature of --196 deg C and heating to a temperature of 20 deg . The specimens were subjected to NI in the active zone, near the U rods, of an experimental physical heavy-water reactor fur periods of 100 and 200 hours. Following thc NI the specimens were allowed to age at room temperature. The NI significantly influenccs the position of the martensitc point and over-all T effect; thc latter also depends on the type of material in question. In the cascs of carbon steels, thc NI elevates the martensite point and increases the T effect during deep cooling. In the case of carbon-free alloys, thc NI affects austenite in an opposite fashion viz., the mairtensite point is lowered and the intensity of Tmore » during cooling is reduced. In carbon steels, a certain amount of martensite is formed already during thc NI process. The manner in which irradiation affects martensite T has much in common with the effect of plastic deformation. The aging of specimens at room temperature results in improved stability of austenite. The poor temperature stability of thc activating effect of NI indicates that it is governed by formation of defects of the vacancy interstitial-intrusion type which produce elastic deformations in the crystal lattice. The stabilizing effect of NI is brought about by the formation of defects that are caused by division and disorientation of crystals, as a result of which the chances for the appearance and growth of martensite crystals are diminished.« less" @default.
- W155571018 created "2016-06-24" @default.
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- W155571018 date "1958-01-01" @default.
- W155571018 modified "2023-09-27" @default.
- W155571018 title "EMPLOYMENT OF NEUTRON IRRADIATION IN STUDYING MARTENSITE TRANSFORMATIONS" @default.
- W155571018 hasPublicationYear "1958" @default.
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