The Study of the Complex Mechanical Properties of Rolled Bars of VT6 Alloy as a Function of Chemical Composition and Structure Type

Yu. B. Egorova, I. M. Mamonov, L. V. Davydenko

Abstract


This paper presents the results of statistical tests carried out to identify the mechanical properties of ⌀16–150 mm VT6 titanium alloy bars as a function of their post-annealing chemical composition and structure. It is shown that the high variation of mechanical properties may be due to fluctuations in the grade composition and structure type. 50% to 60% of variations in strength properties are due to composition+structure co-effects.  To improve the stability of such properties, the paper identifies maximum permissible total fluctuations in the chemical composition in terms of aluminum/molybdenum equivalents of alloying elements and impurities. The research team has fitted the regression dependencies for evaluating the mean values of the mechanical properties of 16-60 mm VT6 bars as a function of the structure type and aluminum/molybdenum equivalents of the alloying elements and impurities.

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References


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DOI: http://dx.doi.org/10.24892/RIJIE/20190408

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