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Structural phase transformations in welding high-alloyed titanium alloy
https://doi.org/10.22349/1994-6716-2021-107-3-63-81
Abstract
This article investigates the change in the phase composition and structural state during the thermal cycle of welding a high-alloyed titanium alloy. It is shown that structural-phase transformations in the welded joint occurring under the influence of the thermal and deformation cycle of welding lead to the formation of metastable phases, and its subsequent decomposition can lead to ductility losses. To bring the metal of the welded joint to an equilibrium state, stabilizing annealing is required.
Keywords
titanium alloys,
welded joint,
electron microscopic examination,
structure,
metastable phases,
precipitation of secondary phases,
microhardness
Supporting agencies: Experimental studies were performed on the equipment of the Center for Collective Use “Composition, Structure and Properties of Structural and Functional Materials” of the NRC “Kurchatov Institute” – CRISM “Prometey” with financial support from the Ministry of Science and Higher Education of the RF, Agreement 13.ЦКП.21.0014 (075-11-2021-068), unique identifier RF–2296.61321X0014.
About the Authors
V. I. Mikhaylov
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
Dr Sc. (Eng)
49 Shpalernaya St, 191015 St Petersburg
I. R. Kozlova
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
Cand Sc. (Eng)
49 Shpalernaya St, 191015 St Petersburg
S. V. Kuznetsov
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
Yu. M. Markova
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
E. A. Vasilieva
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
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Review
For citations:
Mikhaylov V.I., Kozlova I.R., Kuznetsov S.V., Markova Yu.M., Vasilieva E.A. Structural phase transformations in welding high-alloyed titanium alloy. Voprosy Materialovedeniya. 2021;(3(107)):63-81. (In Russ.) https://doi.org/10.22349/1994-6716-2021-107-3-63-81
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