In Situ CT Tensile Testing of an Additively Manufactured and Heat-Treated Metastable ß-Titanium Alloy (Ti-5Al-5Mo-5V-3Cr)

Hendl, Julius; Daubner, Sina; Marquardt, Axel; Stepien, Lukas; López, Elena; Brückner, Frank; Leyens, Christoph

doi:10.3390/app11219875

Cited by 6 publications

(1 citation statement)

References 38 publications

(57 reference statements)

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“…Using this technique, volumetric analysis of strains and investigation of more complex phenomena such as crack propagation [3,4], damage development or failure mechanism identification [5][6][7] are becoming possible. Currently, a number of devices for in-situ mechanical testing in X-ray scanners is available and is developed at both commercial [8,9] and research basis [4,10]. Inherent limitations of the in-situ method arise from the characteristics of the X-ray scanners and design of the loading device, while the challenges consist particularly in available loading capacity (related to the stiffness of the device and selection of the employed components) and achievable resolution of the tomography scan (related mainly to the dimensions of the in-situ device).…”

Section: Introductionmentioning

confidence: 99%

VERTEX – versatile in-situ testing rig for X-ray scanners

Fíla¹,

Rada²,

Zlámal³

et al. 2022

eJNDT

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In this contribution, we introduce a next-generation in-situ loading stage VERTEX (VERsatile in-situ TEsting rig for X-ray scanners) allowing for both high load capacity and high resolution tomographical imaging in a broad range of experiments including uni-axial, flexural, torque testing, and their combinations. The device is designed as a double column testing rig with two individually controlled rotary stages. It consists of 6 individual function blocks (two loading columns, two rotary stages, two cross-head beams) ensuring easy manipulation and reasonable portability. The function blocks can be assembled into different geometrical configurations (uni-axial on-axis, uni-axial off-axis, flexural) while additional loading modules can be mounted onto the rotary stages (e.g., voice coil vibration loading stage). In comparison with the conventional existing devices having the identical arrangement (two columns, two rotary stages), the loading capacity of the VERTEX is several times higher while dimensions and robustness of the device still do not significantly limit the achievable resolution.

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Section: Introductionmentioning

confidence: 99%

VERTEX – versatile in-situ testing rig for X-ray scanners

Fíla¹,

Rada²,

Zlámal³

et al. 2022

eJNDT

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Electron beam powder bed fusion manufacturing of a Ti-5Al-5Mo-5V-3Cr alloy: a microstructure and mechanical properties’ correlation study

Hendl

Marquardt²,

Leyens³

2022

Prog Addit Manuf

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Electron beam powder bed fusion (EB-PBF) is a powder-bed fusion additive manufacturing process, which is suitable for fabricating high-performance parts for a wide range of industrial applications, such as medical and aerospace. Due to its deep curing capabilities, the metastable β-alloy Ti-5Al-5Mo-5V-3Cr (Ti-5553) is currently mostly used in the landing gear of airplanes. However, its great mechanical properties make it also attractive for small, complex, and load-bearing components. In this study, nine melting parameter sets, combining different scanning speeds and beam currents, were used in the EB-PBF ARCAM A2X system. Furthermore, the correlation between the microstructure and the mechanical properties was investigated and analyzed by applying µ-focus computer tomography and microscopic methods (optical, SEM/EDS). A significant influence of the different melting parameters on the microstructure as well as on the mechanical performance was found. In a subsequent step, three melting parameters were selected and the specimens were heat-treated (BASCA, STA) for further investigation. The experimental results of this work indicate that Ti-5553 parts can be manufactured successfully with high quality (ρ > 99.60%), and post-processing heat-treatments can be used to modify the microstructure in such a way that the parts are suitable for a large variety of possible applications.

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Fatigue properties of a Ti–5Al–5Mo-5 V–3Cr alloy manufactured by electron beam powder bed fusion

Hendl,

Zeuner,

Schettler

et al. 2024

Prog Addit Manuf

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Additive manufacturing (AM) is a modern way of manufacturing structures, which tends to have fewer design limitations than those manufactured by conventional processes such as casting or forging. A combination of high-strength materials and small and complex structures opens up a wide range of potential applications, especially in the fields of medicine and aerospace. Titanium and its alloys show a very beneficial combination of density and mechanical properties. One of these alloys is the metastable β titanium alloy Ti– 5Al–5Mo–5 V–3Cr (Ti-5553), which is currently used mainly for large forged structures like landing gears of airplanes. In this study, for the first time the fatigue behavior of electron beam powder bed fused (PBF-EB) Ti-5553 was investigated with a focus on the defects created by the layer wise manufacturing. To understand the defect structure and its respective influence on the fatigue behavior, all specimens were scanned prior to fatigue testing using a state-of-the-art µ-focus CT. The specimens were subjected to two heat treatment procedures commonly used in technical applications, which were aiming for high strength (solution treated and aged—STA) as well as high ductility (beta annealed, slow cooled and aged—BASCA). Results indicate that the fatigue strength of PBF-EB manufactured Ti-5553 is significantly reduced compared to conventionally manufactured Ti-5553. The main reason for this are defects, which have varying critical effects depending on the heat treatment of the specimen and the defect size, shape, location and type.

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In Situ CT Tensile Testing of an Additively Manufactured and Heat-Treated Metastable ß-Titanium Alloy (Ti-5Al-5Mo-5V-3Cr)

Cited by 6 publications

References 38 publications

VERTEX – versatile in-situ testing rig for X-ray scanners

VERTEX – versatile in-situ testing rig for X-ray scanners

Electron beam powder bed fusion manufacturing of a Ti-5Al-5Mo-5V-3Cr alloy: a microstructure and mechanical properties’ correlation study

Fatigue properties of a Ti–5Al–5Mo-5 V–3Cr alloy manufactured by electron beam powder bed fusion

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