Archive

Aviation materials and tecnologes №3, 2018

DOI: 10.18577/2071-9140-2018-0-3-3-10

UDC: 669.017.165:669.295

Pages: 3-10

D.A. Dzunovich1, E.A. Lukina2, A.L. Yakovlev1

[1] Federal State Unitary Enterprise «All-Russian Scientific Research Institute of Aviation Materials»,
[2] Moscow Aviation Institute (National Research University),

INFLUENCE OF HEAT TREATMENT PARAMETERS ON PRODUCIBILITY AND MECHANICAL PROPERTIES OF SHEETS MADE FROM HIGH-STRENGTH TITANIUM ALLOY VT23

The influence of the vacuum heat treatment parameters on structural phase state, technological plasticity at room temperature, and mechanical properties of industrial sheets from VT23 alloy with 2,5 mm thickness was studied. It is shown that the developed parameters of double-stage annealing makes it possible to form two-phase structure with α-particle size of 5-7 μm and β-stabilization coefficient at the level of similar characteristics for pseudo-β-alloys. This treatment provides the angle of bend of the sheets during three-point bend tests at room temperature after load removal at least 100 degrees. It is established that the subsequent hardening heat treatment according to the developed two-stage mode allows achieving strength levels in the sheets above 1000 MPa.

Keywords: VT23 alloy, sheet, phase composition, structure, heat treatment, texture, angle of bend, anisotropy, mechanical properties

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