Conclusions
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1.
From the change in the hardness and the results of metallographic and x-ray analysis we plotted isothermal transformation diagrams for alloys of the critical composition of the VT22 type in which molybdenum and vanadium were partially or completely replaced with iron and chromium.
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2.
Increasing the amount of iron and chromium, with a corresponding reduction in the amount of molybdenum and vanadium, accelerates the beginning of decomposition of the β phase.
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3.
Alloying with over 4.2% iron and chromium lowers the upper limit at which ω phase exists (as compared with alloy VT22).
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4.
No intermetallic compounds were observed in any of the alloys investigated with isothermal holding for 100 h.
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Literature cited
K. Löhberd and H. Westphal, Z. Metallk.,49, 9 449–455 (1958).
L. P. Luzhnikov, V. M. Nivikova, and A. P. Mareev, "Transformations in titanium alloys during heat treatment," Metal. i Term. Obrabotka Metal., 5, 21 (1965).
Yu. A. Bagryatskii, T. V. Tagunova, and G. I. Nosova, "Metastable phases in titanium alloys with transition elements," in: Problems of Metal Science and Physics of Metals [in Russian], No. 5, Metallurgizdat, Moscow (1958), pp. 210–234.
Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 8, pp. 50–52, August, 1975.
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Moiseeva, N.A., Legkodukh, A.M. & Plakidina, S.N. Isothermal transformation in α+β titanium alloys of critical composition. Met Sci Heat Treat 17, 692–694 (1975). https://doi.org/10.1007/BF00664319
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DOI: https://doi.org/10.1007/BF00664319