Effect of solution temperature on microstructures and tensile properties of high strength Ti–6Cr–5Mo–5V–4Al alloy

Li, Cheng Lin; Mi, Xujun; Ye, Wenjun; Hui, Songxiao; Yu, Yang; Wang, Weiqi

doi:10.1016/j.msea.2013.04.063

Cited by 54 publications

(16 citation statements)

References 15 publications

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“…A study by Li et al, on the new metastable Ti-6Cr-5Mo-5V-4Al (wt. %) alloy, which has a MoE of 14.0, evaluated the effect of solution temperature on the microstructure and mechanical properties [126]. These authors reported that the alloy has a more attractive combination of strength and ductility when using alpha-beta solution treatment compared to beta solution treatment followed by isothermal aging.…”

Section: Solution Treatmentmentioning

confidence: 99%

A Review of Metastable Beta Titanium Alloys

Kolli

Devaraj

2018

Metals

454

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: Solution Treatmentmentioning

confidence: 99%

A Review of Metastable Beta Titanium Alloys

Kolli

Devaraj

2018

Metals

454

175

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“…Thin α plates are much harder than β phase due to their small size and hard to deform [13]. Besides, thin α plates produce a high number of α/β interfaces and have an attractive reinforcing effect to alloy [14]. While, large amount of dislocations can be activated and accumulated in thick α plates, which is helpful to improve the ductility of alloy [15].…”

Section: Introductionmentioning

confidence: 99%

Dependence of Macro- and Micro-Properties on α Plates in Ti-6Al-2Zr-1Mo-1V Alloy with Tri-Modal Microstructure

Shen

Wei

et al. 2018

Metals

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Tri-modal microstructure is often the target microstructure of titanium alloy components. In this study, the parameters, such as volume fraction, size of primary equiaxed α (α p ), secondary lamellar α (α s ) and thin α plates (α t ) in tri-modal microstructure of Ti-6Al-2Zr-1Mo-1V alloy are adjusted by double heat treatment procedures. The properties of these constituent phases and their effect on the macro-properties are then investigated. The results show that the hardness of primary α (α p ) varies slightly with heat treatment routes. The hardness of α plates region including α s and α t increases with increasing α t volume fraction and not with decreasing thickness of α s and α t . Using volume average of the thickness of α s and α t as effective thickness (t eff ), the hardness of α plates region and t eff follow the Hall-Petch relationship. Meanwhile, as α t volume fraction increases, colony structure of α s is gradually destroyed, which makes each α s have large deformation degree by multiple directions slip. When volume fraction ratio of α p , α s and α t is about 1:1:1, α p and α s can undergo relatively large deformation and α t can contribute relatively large strength to the alloy and therefore the alloy has both good strength and ductility.

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“…Similar to nanocrystalline metals, conventional lamellar structures in Ti alloys are generally composed of singlemodal fine lamellae, which usually results in high strength but limited ductility [10][11]. Hence, a hierarchical laminated structure that consists of large primary α p grains and fine α lamellae (bimodal structure) or of lamellae with different sizes, e.g., in width with nanometre and sub-micrometre scales, has also recently been used to enhance the combination of mechanical properties of Ti alloys [10][11][12][13][14][15][16]. However, a hierarchical structure with extremely fine ( $ 50-100 nm in length) and coarse α lamellae ( $1 μm in length) has been reported to result in a better combination of mechanical properties than that of a hierarchical structure consisting of primary α p grains and coarse α lamellae ( $1 μm in length) [15].…”

Section: Introductionmentioning

confidence: 99%

“…However, the width of fine α lamellae has generally been reported to be $ 50-100 nm [10,[14][15][16]. Therefore, obtaining extremely fine lamellae, e.g., o 30 nm in width, for improving the mechanical properties of Ti alloys with hierarchical structures is a challenge.…”

Section: Introductionmentioning

confidence: 99%