Recent advances in the deformation processing of titanium alloys

Recent advances in the deformation processing of titanium alloys

Titanium (Ti) alloys are special-purpose materials used for several critical applications in aerospace as well as non-aerospace industries, and extensive deformation processing is necessary to shape-form these materials, which poses many challenges due to the microstructural complexities. Some of th...

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Bibliographic Details
Published in:Journal of materials engineering and performance Vol. 12; no. 6; pp. 661 - 673
Main Authors: TAMIRISAKANDALA, S, VEDAM, B. V, BHAT, R. B
Format: Journal Article
Language:English
Published: New York, NY Springer 01-12-2003
Springer Nature B.V
Subjects:
Aircraft components
Alloys
Applied sciences
Cross-disciplinary physics: materials science; rheology
Deformation
Exact sciences and technology
Hot working
Materials science
Metals. Metallurgy
Microstructure
Other heat and thermomechanical treatments
Physics
Schedules
Titanium
Titanium base alloys
Treatment of materials and its effects on microstructure and properties
Workability
Forming processes
Hot working
Vanadium alloys
Ternary alloys
Mechanical properties
Plastic deformation
Titanium base alloys
Lamellar structure
Reviews
Aluminium alloys
Thermomechanical treatments
Microstructure
Strain rate
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Summary:Titanium (Ti) alloys are special-purpose materials used for several critical applications in aerospace as well as non-aerospace industries, and extensive deformation processing is necessary to shape-form these materials, which poses many challenges due to the microstructural complexities. Some of the recent developments in the deformation processing of Ti alloys and usefulness of integrating the material behavior information with simulation schemes while designing and optimizing manufacturing process schedules are discussed in this paper. Discussions are primarily focused on the most important alloy, Ti-6Al-4V and on developing a clear understanding on the influence of key parameters (e.g., oxygen content, starting microstructure, temperature, and strain rate) on the deformation behavior during hot working. These studies are very useful not only for obtaining controlled microstructures but also to design complex multi-step processing sequences to produce defect-free components. Strain-induced porosity (SIP) has been a serious problem during titanium alloy processing, and improved scientific understanding helps in seeking elegant solutions to avoid SIP. A novel high-speed processing technique for microstructural conversion in titanium has been described, which provides several benefits over the conventional slow-speed practices. The hot working behavior of some of the affordable α+β and β titanium alloys being developed recently--namely, Ti-5.5Al-1Fe, Ti-10V-2Fe-3Al, Ti-6.8Mo-4.5Fe-1.5Al, and Ti-10V-4.5Fe-1.5Al--has been analyzed, and the usefulness of the processing maps in optimizing the process parameters and design of hot working schedules in these alloys is demonstrated. Titanium alloys modified with small additions of boron are emerging as potential candidates for replacing structural components requiring high specific strength and stiffness. Efforts to understand the microstructural mechanisms during deformation processing of Ti-B alloys and the issues associated with their processing are discussed.[PUBLICATION ABSTRACT]
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:1059-9495
1544-1024
DOI:10.1361/105994903322692466