Influence of Heat Treatment on Microstructure and Mechanical Characteristics of the Titanium Alloy Ti-5Al-5 V-2Mo-Cr with Metastable β-Phase

In this study, mechanical characteristics and microstructural evolution of Ti-5Al-5 V-2Mo-Cr titanium alloy after quenching from different temperatures and tensile deformation were investigated. It was established that the destabilization of the β -phase in relation to the development of β  →  α &qu...

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Bibliographic Details
Published in:Transactions of the Indian Institute of Metals 2023-08, Vol.76 (8), p.2091-2097
Main Authors: Gladkovsky, Sergei V., Veselova, Valeria E., Sergeev, Semyon N., Patselov, Alexander M.
Format: Article
Language:English
Subjects:
Beta phase
Boundaries
Chemistry and Materials Science
Corrosion and Coatings
Destabilization
Fracture surfaces
Heat treatment
Impact strength
Impact tests
Martensite
Martensitic transformations
Materials Science
Mechanical properties
Metallic Materials
Microstructure
Original Article
Quenching
Superelasticity
Tensile deformation
Tensile tests
Titanium base alloys
Tribology
Vanadium
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Summary:In this study, mechanical characteristics and microstructural evolution of Ti-5Al-5 V-2Mo-Cr titanium alloy after quenching from different temperatures and tensile deformation were investigated. It was established that the destabilization of the β -phase in relation to the development of β  →  α " stress-induced martensitic transformation (SIMT) with an increase in quenching temperature from 800 to 860 ℃ contributes to the appearance of “double yield mechanical behavior” and superelasticity effect during tensile tests causes an increase in strength properties and impact toughness characteristics of the alloy. SIMT quenched from 860 ℃ alloy also leads to the change in fracture surface micromechanism at impact tests from intergranular cracking along the boundaries of α / β -phases to destruction along the boundaries of α "-martensite packets. X-ray phase analysis and TEM methods have been used to detect the formation of needle-like α "-martensite, which is formed in the neck zone of tensile specimen quenched from the temperature of 860 ℃.
ISSN:0972-2815
0975-1645
DOI:10.1007/s12666-023-02908-2