Conclusions
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1.
Slow cooling in the α→β range tends to improve the ductility and lower the strength of alloy VT20. With rapid cooling both from α→β temperatures and in the β range the ductility decreases and the strength increases slightly, especially with quenching from temperatures in the α→β range.
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2.
The low-cycle fatigue strength decreases most for notched samples after slow cooling from temperatures in the β range.
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3.
Redistribution of alloying elements occurs during slow cooling, with segregation of molybdenum, vanadium, and zirconium in the phase boundaries, forming an interlayer of stable β phase at 20°.
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Literature cited
C. Chen, Corrosion,27, No. 2, 30 (1971).
S. Z. Bokshtein et al., Diffusion Processes in Metals [in Russian], Naukova Dumka, Kiev (1966).
Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 66–69, January, 1978.
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Fedorov, V.N., Borisova, E.A. Effect of structure and phase composition on the mechanical properties of titanium alloy VT20. Met Sci Heat Treat 20, 73–76 (1978). https://doi.org/10.1007/BF00670451
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DOI: https://doi.org/10.1007/BF00670451