Post Weld Annealing of Welded Joints of Refractory Titanium Alloys VT41 AND VT8-1
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Mechanical properties and structure of butt welded pseudo-α-(VT41) and (α + β)-(VT8-1) refractory titanium alloys are studied as applied to electron-beam welding of rotor parts of gas turbine engine compressors. Welded joints of VT8-1 + VT8-1, VT8-1 + VT41 and VT41 + VT41 are studied. The effect of post weld annealing on the short-term and long-term strength and impact strength of matrix metal is studied in the operating temperature range. Partial annealing of welded joints is shown to have a favorable effect on matrix metal and weld material strength properties without a substantial reduction in high-temperature strength. Weld metal ductility remains at a low level, while that of the matrix metal hardly decreases.
Key wordselectron-beam welding titanium alloys gas turbine engine heat treatment martensite
Work was carried within the scope of implementing comprehensive scientific direction 2.2 “Qualification and study of materials” (Strategic area for development of materials and their processing technology for the period up to 2030).
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