Timetal® 407: A Titanium Alloy to Enable Cost Reduction

James, Steven; Kosaka, Yoji; Thomas, Rebecca; Garratt, P.G.

doi:10.1002/9781119296126.ch121

Cited by 14 publications

(21 citation statements)

References 1 publication

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“…The three α+β titanium alloys under investigation are characterised by the initial microstructures shown in Fig.1. Specifically, the microstructures of Ti0.7Al4V [20] and…”

Section: Introductionmentioning

confidence: 99%

Rate dependent behaviour and dynamic strain localisation of three novel impact resilient titanium alloys: Experiments and modelling

Zhang

Gour

Petrinić

et al. 2020

Materials Science and Engineering: A

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The tensile behaviour of three ductile titanium alloys, Ti0.7Al4V, Ti1Al4V and Ti3Al2.5V, conceived for impact containment applications, is characterized at quasi-static, intermediate and high strain rates. Tests have been performed using a screw driven mechanical system and a bespoke in-house developed split Hopkinson tension bar equipped with ultra-high speed photographic equipment 1. The three alloys present noticeable strain rate sensitivity. Ti1Al4V is characterised by the lowest flow stress and highest ductility of the three alloys. Ti3Al2.5V higher flow stress but lowest strain to failure while Ti0.7Al4V has similar flow stress but larger engineering failure strain compared to Ti3Al2.5V. The dynamic true strain rate, determined by measuring the time history of the minimum cross-section diameter during necking, reaches values up to one order of magnitude higher than the nominal strain rate. This phenomenon, occurring during dynamic strain localisation, is of fundamental importance for understanding and modelling the dynamic behaviour of ductile alloys designed to withstand impact loading. The experimental results are used to determine the material parameters of the Johnson-Cook (JC) and Khan-Huang-Liang (KHL) models, which are incorporated in the ABAQUS/explicit code for finite element simulations of the dynamic tensile tests. It is found that the KHL model predicts the experimentally measured strain field, deformed geometry, effective strain rate and macroscopic force-displacement response during the high strain rate experiments with significantly better agreement than the JC model.

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“…The three α+β titanium alloys under investigation are characterised by the initial microstructures shown in Fig.1. Specifically, the microstructures of Ti0.7Al4V [20] and…”

Section: Introductionmentioning

confidence: 99%

Rate dependent behaviour and dynamic strain localisation of three novel impact resilient titanium alloys: Experiments and modelling

Zhang

Gour

Petrinić

et al. 2020

Materials Science and Engineering: A

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“…Ti-407 can provide considerable cost savings through ease of processing and machining, while still exceeding the ballistic impact performance of Ti-6Al-4V. The alloy achieves these properties through a combination of high ductility and moderate strength, producing a high fracture toughness alloy [12].…”

Section: Introduc Onmentioning

confidence: 99%

“…MATEC Web of Conferences 321, 11045 (2020) https://doi.org/10.1051/matecconf/202032111045 The 14 th World Conference on Titanium TIMETAL®407 experiences high degrees of strain during deformation while maintaining moderate levels of strength [12]. This combination creates a high fracture toughness alloy.…”

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confidence: 99%

A Comparative Study on the Substructure Evolution and Mechanical Properties of TIMETAL^® 407 and Ti-64

et al. 2020

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Titanium and titanium alloys are excellent candidates for aerospace applications owing to their high strength to weight ratio. Alpha/beta titanium alloys are used in nearly all sections of the aircraft, including the fuselage, landing gear, and wing. Ti-6Al-4V is the workhorse alloy of the titanium industry, comprising of nearly 60% of total titanium production. TIMETAL® 407, Ti-0.85Al-3.9V-0.25Si-0.25Fe (Ti-407) is an excellent candidate for alloy applications requiring excellent machinability and increased energy absorption. These properties are a result of the alloy’s increased ductility while maintaining moderate levels of strength. In this study, the deformation mechanisms of Ti-407 have been studied at high strain rates using split-Hopkinson bar testing. Utilizing post-mortem characterization, Ti-407 has been shown to deform significantly by ⟨c+a⟩ slip and deformation twinning. The observation of ⟨c+a⟩ slip is in contrast with other studies and will be discussed further.

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“…The most relevant applications within the gas turbine are, therefore, those structural applications where impact resistance is important. Previously published mechanical assessments showed that Ti-407 absorbed nearly twice the impact energy of Ti-6-4 and exhibited 2.5 times the lateral expansion under representative loading during Charpy tests [3] . Further to this, Ti-407 displayed more than double the tool life than that of Ti-6-4, based on V15 tests (a standardized machining test that allows ranking between alloys, V15 referring to the speed of a cutting tool that induces complete wear in a period of 15 minutes).…”

Section: Introductionmentioning

confidence: 91%

“…Pre-production Ti-407 material (Ti-0.85Al-3.9V-0.15O-0.25Si-0.25Fe) was produced by TIMET via electron beam single melting (EBSM) in a cold hearth furnace to create an ingot and then processed using a combination of beta forging, plus alpha-beta forging or rolling [3] . The present study then utilised "pancake" forgings produced from this material.…”

Section: Ti-407 Production and Samplingmentioning

confidence: 99%

Fatigue Performance of the Novel Titanium Alloy TIMETAL^®407

et al. 2020

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TIMETAL®407 (Ti-407) is a novel titanium alloy formulated as a medium strength, highly ductile alloy offering a range of manufacturing cost reduction opportunities. It can be used as a direct replacement for Ti-6Al-4V or Ti-3Al-2.5V alloys, particularly in applications where energy absorption during fracture or HCF endurance are the key design criteria. The effect of thermo-mechanical processing on microstructure has been characterised and the room temperature high cycle, low cycle and dwell cycle fatigue properties of Ti-407 containing 30-40% primary alpha volume fraction are presented and discussed. These results are compared with data generated from Ti-6Al-4V processed to provide a similar but non-standard microstructure and demonstrate that Ti-407 shows superior HCF endurance strength, despite having a significantly lower tensile and yield strength.

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Timetal® 407: A Titanium Alloy to Enable Cost Reduction

Cited by 14 publications

References 1 publication

Rate dependent behaviour and dynamic strain localisation of three novel impact resilient titanium alloys: Experiments and modelling

Rate dependent behaviour and dynamic strain localisation of three novel impact resilient titanium alloys: Experiments and modelling

A Comparative Study on the Substructure Evolution and Mechanical Properties of TIMETAL^® 407 and Ti-64

Fatigue Performance of the Novel Titanium Alloy TIMETAL^®407

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Timetal® 407: A Titanium Alloy to Enable Cost Reduction

Cited by 14 publications

References 1 publication

Rate dependent behaviour and dynamic strain localisation of three novel impact resilient titanium alloys: Experiments and modelling

Rate dependent behaviour and dynamic strain localisation of three novel impact resilient titanium alloys: Experiments and modelling

A Comparative Study on the Substructure Evolution and Mechanical Properties of TIMETAL® 407 and Ti-64

Fatigue Performance of the Novel Titanium Alloy TIMETAL®407

Contact Info

Product

Resources

About

A Comparative Study on the Substructure Evolution and Mechanical Properties of TIMETAL^® 407 and Ti-64

Fatigue Performance of the Novel Titanium Alloy TIMETAL^®407