Development of α precipitates in metastable Ti-5Al-5Mo-5V-3Cr and similar alloys

Manda, Premkumar; Singh, Vajinder; Chakkingal, Uday; Singh, A. K.

doi:10.1016/j.matchar.2016.09.005

Cited by 32 publications

(13 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…TEM observations would be necessary to verify which of these models is appropriate for the present case. Recent publications have reported similar microstructural features for Ti-7333 [52] and Ti-5553 [53] under aging conditions. Figure 10c shows the grain boundary consisting of α-GB, an α-WGB plate, and the set α-WGB + α-GB.…”

supporting

confidence: 52%

In Situ Analysis of the Phase Transformation Kinetics in the β-Water-Quenched Ti-5Al-5Mo-5V-3Cr-1Zr Alloy during Ageing after Fast Heating

Guimarães

Callegari

Warchomicka

et al. 2020

QuBS

View full text Add to dashboard Cite

Thermal treatments are the main route to achieve improvements in mechanical properties of β-metastable titanium alloys developed for structural applications in automotive and aerospace industries. Therefore, it is of vital importance to determine phase transformation kinetics and mechanisms of nucleation and precipitation during heat treatment of these alloys. In this context, the present paper focuses on the assessment of solid-state transformations in a β-water-quenched Ti-5Al-5Mo-5V-3Cr-1Zr alloy during the early stages of ageing treatment at 500 °C. In situ tracking of transformations was performed using high-energy synchrotron X-ray diffraction. The transformation sequence β + ω → α + α”iso + β is proposed to take place during this stage. Results show that isothermal α” phase precipitates from ω and from spinodal decomposition domains of the β phase, whereas α nucleates from ω, β and also from α” with different morphologies. Isothermal α” is considered to be the regulator of transformation kinetics. Hardness measurements confirm the presence of ω, although this phase was not detected by X-ray diffraction during the in situ treatment.

show abstract

supporting

confidence: 52%

In Situ Analysis of the Phase Transformation Kinetics in the β-Water-Quenched Ti-5Al-5Mo-5V-3Cr-1Zr Alloy during Ageing after Fast Heating

Guimarães

Callegari

Warchomicka

et al. 2020

QuBS

View full text Add to dashboard Cite

show abstract

“…These metastable phases serve as heterogeneous nucleation sites for the equilibrium hcp α-phase. Studies are present in the existing literature on microstructural evolution of the secondary α-phase precipitates and concomitant changes in tensile or hardness properties during low temperature aging [69,131]. However, recent interest on the nucleation and growth mechanisms of the secondary α- [34,124].…”

Section: Agingmentioning

confidence: 99%

A Review of Metastable Beta Titanium Alloys

Kolli

Devaraj

2018

Metals

494

175

View full text Add to dashboard Cite

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.

show abstract

“…Owing to the high specific strength, remarkable fracture toughness, excellent creep and corrosion resistance, β titanium alloys have been used widely in many fields such as aerospace, aircraft, ship, and nuclear energy [1][2][3][4]. For instance, Ti-10V-2Fe-3Al was used in landing gear forgings in Boeing 777 [5], and landing gear forgings were manufactured by Ti-5Al-5Mo-5V-3Cr-0.5Fe alloys in Boeing-787 and Airbus-350 [6].…”

Section: Introductionmentioning

confidence: 99%

Constitutive Relationship for Hot Deformation of TB18 Titanium Alloy

Yuan

Xiang³

2020

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

In the present work, the hot deformation behavior of TB18 titanium alloy was investigated by isothermal hot compression tests with temperatures from 650 to 880°C and strain rates from 0.001 to 10 s−1. The flow curves after friction and temperature correction show that the peak stress decreased with the temperature increase and the strain rate decrease. Three typical characteristics of flow behavior indicate the dynamic softening behavior during hot deformation. At a strain rate of 0.001∼0.01 s−1, the flow stress continues to decrease as the strain rate increases after the flow stress reaches the peak stress; the flow softening mechanism is dynamic recovery and dynamic recrystallization at a lower temperature and dynamic recrystallization at a higher temperature. The discontinuous yielding phenomenon could be seen at a strain rate of 1 s−1, dynamic recrystallization took place in the β single-phase zone, and flow localization bands were observed in the α + β two-phase zone. At a higher strain rate of 10 s−1, the flow instabilities were referred to as the occurrence of flow localization by adiabatic heat. Constitutive equation considering the compensation of strain was also established, and the results show high accuracy to predict the flow stress with the correlation coefficient of 99.2% and the AARE of 6.1%, respectively.

show abstract

Development of α precipitates in metastable Ti-5Al-5Mo-5V-3Cr and similar alloys

Cited by 32 publications

References 26 publications

In Situ Analysis of the Phase Transformation Kinetics in the β-Water-Quenched Ti-5Al-5Mo-5V-3Cr-1Zr Alloy during Ageing after Fast Heating

In Situ Analysis of the Phase Transformation Kinetics in the β-Water-Quenched Ti-5Al-5Mo-5V-3Cr-1Zr Alloy during Ageing after Fast Heating

A Review of Metastable Beta Titanium Alloys

Constitutive Relationship for Hot Deformation of TB18 Titanium Alloy

Contact Info

Product

Resources

About