The Microstructural and Phase Evolution of the 3D Printed
Ti–6Al–4V Alloy during Mechanical Loading

A. V. Panin; Панин А. В.; M. S. Kazachenok; Казаченок М. С.; L. A. Kazantseva; Казанцева Л. А.; O. B. Perevalova; Перевалова О. Б.; S. A. Martynov; Мартынов С. А.

doi:10.31857/S0015323022600691

The Microstructural and Phase Evolution of the 3D Printed Ti–6Al–4V Alloy during Mechanical Loading

Authors: Panin A.V.¹^,2, Kazachenok M.S.¹, Kazantseva L.A.¹^,3, Perevalova O.B.¹, Martynov S.A.¹
Affiliations:
1. Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences
2. National Research Polytechnic University
3. Tomsk State University of Architecture and Building
Issue: Vol 124, No 2 (2023)
Pages: 226-232
Section: СТРУКТУРА, ФАЗОВЫЕ ПРЕВРАЩЕНИЯ И ДИФФУЗИЯ
URL: https://ruspoj.com/0015-3230/article/view/662855
DOI: https://doi.org/10.31857/S0015323022600691
EDN: https://elibrary.ru/HJOOWU
ID: 662855

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Abstract

This paper presents the results of an in situ study on the evolution of the microstructure and phase composition of 3D-printed Ti–6Al–4V samples under tension in the transmission electron microscope col-umn. The microstructure of Ti–6Al–4V specimens manufactured by wire-feed electron beam additive tech-nology is shown to consist of columnar primary β-grains inside of which are α/α'-Ti laths separated by layers of the residual β-phase and gathered into packets. A characteristic feature of 3D-printed Ti–6Al–4V samples is the concentration nonuniformity of the alloying elements due to the partial decomposition of the marten-sitic α'-phase. The reorientation of the α/α'-Ti lattice near interfaces takes place during uniaxial tension. Deformation-induced α'→α" transformations can develop in the reoriented regions of the α/α'-Ti lattice, in places enriched in vanadium.

Keywords

additive technologies, titanium Ti–6Al–4V alloy, transmission electron microscopy, deforma-tion-induced phase transformations, tension

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