Processing-microstructure-yield strength correlation in a near β Ti alloy, Ti–5Al–5Mo–5V–3Cr

A combined set of thermo-mechanical steps recommended for high strength β Ti alloy are homogenization, deformation, recrystallization, annealing and ageing steps in sequence. Recrystallization carried out above or below β transus temperature generates either β annealed (lath type morphology of α) or...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2014-07, Vol.610, p.171-180
Main Authors: Kar, Sujoy Kumar, Suman, Swati, Shivaprasad, S., Chaudhuri, Atanu, Bhattacharjee, Amit
Format: Article
Language:English
Subjects:
Annealing
Cold working, work hardening
annealing, quenching, tempering, recovery, and recrystallization
textures
Condensed matter: structure, mechanical and thermal properties
Correlation
Cross-disciplinary physics: materials science
rheology
Elasticity, elastic constants
Exact sciences and technology
Heat treatment
Heat treatment parameters
Homogenizing
Materials science
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Microstructure
Physics
Recrystallization
Solid solution, precipitation, and dispersion hardening
aging
Titanium base alloys
Ti–5Al–5Mo–5V–3Cr
Treatment of materials and its effects on microstructure and properties
Yield strength
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Summary:A combined set of thermo-mechanical steps recommended for high strength β Ti alloy are homogenization, deformation, recrystallization, annealing and ageing steps in sequence. Recrystallization carried out above or below β transus temperature generates either β annealed (lath type morphology of α) or bimodal (lath+globular morphology of α) microstructure. Through variations in heat treatment parameters at these processing steps, wide ranges of length scales of features have been generated in both types of microstructures in a near β Ti alloy, Ti–5Al–5Mo–5V–3Cr (Ti-5553). 0.2% Yield strength (YS) has been correlated to various microstructural features and associated heat treatment parameters. Relative importance of microstructural features in influencing YS has been identified. Process parameters at different steps have been identified and recommended for attaining different levels of YS for this near β Ti alloy.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2014.04.113