Quantitative microstructural characterization of a near beta Ti alloy, Ti-5553 under different processing conditions

Kar, Sujoy Kumar; Ghosh, Atasi; Fulzele, Nishant; Bhattacharjee, Anup Kumar

doi:10.1016/j.matchar.2013.03.016

Cited by 89 publications

(26 citation statements)

References 10 publications

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“…%) and Ti-5Al-5Mo-5V-3Cr (wt. %) alloys several other recent studies have been reported in the literature [112][113][114] and research on these alloys remains an important topic. More recently, a few studies have reported on the high-temperature deformation behavior of newly developed or experimental alloys for aerospace applications.…”

Section: Thermo-mechanical Processingmentioning

confidence: 99%

A Review of Metastable Beta Titanium Alloys

Kolli

Devaraj

2018

Metals

455

175

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Abstract:In this article, we provide a broad and extensive review of beta titanium alloys. Beta titanium alloys are an important class of alloys that have found use in demanding applications such as aircraft structures and engines, and orthopedic and orthodontic implants. Their high strength, good corrosion resistance, excellent biocompatibility, and ease of fabrication provide significant advantages compared to other high performance alloys. The body-centered cubic (bcc) β-phase is metastable at temperatures below the beta transus temperature, providing these alloys with a wide range of microstructures and mechanical properties through processing and heat treatment. One attribute important for biomedical applications is the ability to adjust the modulus of elasticity through alloying and altering phase volume fractions. Furthermore, since these alloys are metastable, they experience stress-induced transformations in response to deformation. The attributes of these alloys make them the subject of many recent studies. In addition, researchers are pursuing development of new metastable and near-beta Ti alloys for advanced applications. In this article, we review several important topics of these alloys including phase stability, development history, thermo-mechanical processing and heat treatment, and stress-induced transformations. In addition, we address recent developments in new alloys, phase stability, superelasticity, and additive manufacturing.

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Section: Thermo-mechanical Processingmentioning

confidence: 99%

A Review of Metastable Beta Titanium Alloys

Kolli

Devaraj

2018

Metals

455

175

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“…However, paradoxically, CCTs are not generally available for technical beta alloys (this is an ideal area for future experimental work). Experimental TTT diagrams have been published for some common beta titanium alloys [53][54][55][56][57][58] and can provide an indicator of relative aging kinetics, once a structure is quenched to form supersaturated beta. These are co-plotted in Fig.…”

Section: Tys Mpamentioning

confidence: 99%

“…Such behavior is remarkably different from published TTT curves. 56,58 This remains an important area of future work to better define production operating windows and margins.…”

Section: Tys Mpamentioning

confidence: 99%

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State of the Art in Beta Titanium Alloys for Airframe Applications

Cotton

Briggs

Boyer³

et al. 2015

JOM

329

140

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Beta titanium alloys were recognized as a distinct materials class in the 1950s, and following the introduction of Ti-13V-11Cr-3Al in the early 1960s, intensive research occurred for decades thereafter. By the 1980s, dozens of compositions had been explored and sufficient work had been accomplished to warrant the first major conference in 1983. Metallurgists of the time recognized beta alloys as highly versatile and capable of remarkable property development at much lower component weights than steels, coupled with excellent corrosion resistance. Although alloys such as Ti-15V-3Al-3Sn-3Cr, Ti-10V-2Fe-3Al and Ti-3AI-8V-6Cr-4Mo-4Zr (Beta C) were commercialized into well-known airframe systems by the 1980s, Ti-13V-11Cr-3Al was largely discarded following extensive employment on the SR-71 Blackbird. The 1990s saw the implementation of specialty beta alloys such as Beta 21S and Alloy C, in large part for their chemical and oxidation resistance. It was also predicted that by the 1990s, cost would be the major limitation on expansion into new applications. This turned out to be true and is part of the reason for some stagnation in commercialization of new such compositions over the past two decades, despite a good understanding of the relationships among chemistry, processing, and performance and some very attractive offerings. Since then, only a single additional metastable beta alloy, Ti-5Al-5V-5Mo-3Cr-0.5Fe, has been commercialized in aerospace, although low volumes of other chemistries have found a place in the biomedical implant market. This article examines the evolution of this important class of materials and the current status in airframe applications. It speculates on challenges for expanding their use.

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“…For unwelded Ti-5553, many researchers have investigated various heat treatments for Ti-5553 to further improve its mechanical properties. [10][11][12][13][14][15][16] They have shown the implications of super-and sub-transus treatments, duplex treatments, interrupted cooling, fast cooling, slow cooling, and various other factors on the microstructural evolution and mechanical properties of Ti-5553. These treatments include common heat treatments, such as the beta-annealed slow cool age (BASCA) treatment, a+b solution treatment (ST), a+b solution treatment and age (STA), modified STA, aging, and stress relief, where the STA and aging have proven to impart the highest strength.…”

Section: Introductionmentioning

confidence: 99%

Improving the Mechanical Properties of the Fusion Zone in Electron-Beam Welded Ti-5Al-5Mo-5V-3Cr Alloys

Marvel

Sabol

Pasang

et al. 2017

Metall Mater Trans A

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It is well-known that x-phase precipitates embrittle Ti-5553 alloys and that x-phase embrittlement can be overcome with appropriate heat treatments. However, the microstructural evolution of electron-beam welded Ti-5553 is not as understood as compared to the cast or wrought material. This study compared the microstructures of as-welded and post-weld heat-treated specimens by scanning and transmission electron microscopy, and similarly compared the localized mechanical behavior of the fusion zones with microhardness testing and digital image correlation coupled tensile testing. The primary observations were that the embrittling x-phase precipitates formed upon cooling, and could not be fully solutionized in a single-step treatment of 1077 K (804°C) for 1 hour. It was also discovered that nanoscale a-phase precipitates nucleated after the single-step treatment, although they were small in number and sparsely distributed. However, a two-step heat treatment of 1077 K (804°C) for 1 hour and 873 K (600°C) for 4 hours completely solutionized the x-phase and produced a dense network of 2-lm-wide a-phase plates, which significantly improved the mechanical properties. Overall, this study has shown that post-weld heat treatments improve the strength and ductility of electron-beam welded Ti-5553 alloys by controlling x-and a-phase evolution.

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Quantitative microstructural characterization of a near beta Ti alloy, Ti-5553 under different processing conditions

Cited by 89 publications

References 10 publications

A Review of Metastable Beta Titanium Alloys

A Review of Metastable Beta Titanium Alloys

State of the Art in Beta Titanium Alloys for Airframe Applications

Improving the Mechanical Properties of the Fusion Zone in Electron-Beam Welded Ti-5Al-5Mo-5V-3Cr Alloys

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