Issues »  Volume 38, Issue 5

Features of Crystallographic Texture and Residual-Stresses’ Formation in Titanium VT22 Alloy under Combined Action of Intensive Thermomechanical Processing and Rapid Heating

O. P. Karasevska$^{1}$, P. E. Markovsky$^{1}$, S. L. Antonyuk$^{2}$, I. M. Havrysh$^{2}$

$^{1}$G.V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03680 Kyiv-142, Ukraine
$^{2}$‘Antonov’ Company, 1 Tupolev Str., 03062 Kyiv, Ukraine

Received: 01.03.2016; final version - 30.03.2016. Download: PDF

Formation of crystallographic texture, residual macro- and microstresses during intensive hot deformation with forging—rolling of titanium VT22 alloy followed by rapid heating and forming of bolt head is studied using X-ray diffraction analysis. As established, the residual stresses of different signs and magnitudes appear in different layers depending on distance from the surface. Plastic deformation in $\beta$-phase takes place mainly in {110} planes, while, in $\alpha$-phase precipitated during intensive deformation, plastic flow is coming through all slip systems. As a result, sharp crystallographic texture of $\beta$-phase is formed and combines two types of texture produced by two different kinds of deformation forging and rolling. Subsequent rapid heating followed by forming of bolt head and deformation does not change type of crystallographic texture, but its sharpness is decreased in $\beta$-phase and increased in $\alpha$-phase. The last one can be associated with increase of the $\alpha$-phase volume fracture and, conformably, its wider involvement into deformation process.

Key words: crystallographic texture, residual stresses, microstructure, titanium alloys, deformation, rapid heat treatment, fasteners.

URL: http://mfint.imp.kiev.ua/en/abstract/v38/i05/0617.html

DOI: https://doi.org/10.15407/mfint.38.05.0617

PACS: 61.05.cp, 61.50.Ks, 61.72.Ff, 81.05.Bx, 81.20.Wk, 81.40.Ef, 81.40.Vw

Citation: O. P. Karasevska, P. E. Markovsky, S. L. Antonyuk, and I. M. Havrysh, Features of Crystallographic Texture and Residual-Stresses’ Formation in Titanium VT22 Alloy under Combined Action of Intensive Thermomechanical Processing and Rapid Heating, Metallofiz. Noveishie Tekhnol., 38, No. 5: 617—633 (2016) (in Russian)

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