Fatigue of wire+arc additive manufactured Ti-6Al-4V in presence of process-induced porosity defects

Akgun, Emre; Zhang, Xiang; Biswal, Romali; Zhang, Yanhui; Doré, Matthew

doi:10.1016/j.ijfatigue.2021.106315

Cited by 34 publications

(9 citation statements)

References 41 publications

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“…Therefore, it could be concluded that defects act as preferential location for crack initiation; hence reducing the fatigue life scatter observed in Ti-6Al-4V. As stated in [43], albeit for a different AM process, defect location, i.e. surface or embedded, is much more detrimental to fatigue life scatter than the defect size.…”

Section: Fatigue Test Resultsmentioning

confidence: 83%

Fatigue of laser powder-bed fusion additive manufactured Ti-6Al-4V in presence of process-induced porosity defects

Akgun

Zhang

Lowe

et al. 2022

Engineering Fracture Mechanics

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Section: Fatigue Test Resultsmentioning

confidence: 83%

Fatigue of laser powder-bed fusion additive manufactured Ti-6Al-4V in presence of process-induced porosity defects

Akgun

Zhang

Lowe

et al. 2022

Engineering Fracture Mechanics

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“…Akgun et al reported that the threshold pore diameter, which affects the fatigue life in the regime of approximately 1 © 10 4 cycles or more, is 85 µm for WAAM Ti6Al4V. 35) A d v a n c e V i e w pore diameters were measured from the fracture surface obtained by SEM observation. As shown in Fig.…”

Section: Fatigue Propertiesmentioning

confidence: 99%

“…1,2) However, this alloy's use is limited because its manufacturing cost is high since its productivity and yield are low in such conventional processes as forging and casting. 35) Thus, such net shaping as metal additive manufacturing (AM) and powder metallurgy (PM) has received attention as a technology that reduces production cost. 6,7) Metal AM is a technology for making arbitrarily shaped objects from 3D model data using a heat source (a laser, an electron beam, or a plasma arc) and a feedstock (metal powder or a wire), and layer upon layer deposits.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Performance of Titanium–Aluminum–Vanadium Alloy Fabricated by Laser-Wire-Based Directed Energy Deposition Forming Dot-Shaped Beads

et al. 2023

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Laser-wire-based directed energy deposition (DED) is a type of additive manufacturing. We investigated the chemical composition and fatigue performance to verify the usefulness of Ti6Al4V fabricated by laser-wire-based DED which deposited dot-shaped beads on a base material and conducted in preventing atmospheric intrusion with local shielding only. We compared the fatigue performance to a wrought material equivalent to AMS4967M and evaluated the deposited material in the as-fabricated condition. The chemical composition of the deposited material was within the specifications for the alloy. The fatigue strength at 1 © 10 7 cycles of the deposited material was more than 100 MPa higher than that of 682 MPa of the wrought material. Perhaps the high fatigue strength of the deposited material was caused by the low porosity and the acicular ¡A martensitic phase. From these results, we showed the usefulness of Ti6Al4V deposited by a laser-wire-based DED to which local shielding was applied.

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“…Around the fusion line is easy to produce pores with poor binding force, which is the weak position of mechanical properties of WAAM structures. Therefore, the physical properties of the parallel sample to the direction of deposition are generally lower than those cut of the perpendicular sample to the direction of deposition [40][41][42][43].…”

Section: Tensile Propertiesmentioning

confidence: 99%

Weld morphology, microstructure evolution, and mechanical properties of laser beam welding of wire arc additive manufactured Al-Cu substrate

Shi

Wang

Zhan

et al. 2022

Int J Adv Manuf Technol

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Additive manufacturing (AM) cannot meet the manufacturing requirements of speci c large structures, so use the welding method to joint the small size parts of AM to solve the problem. In work, the laser weld 3mm thick samples cut from WAAM block under different laser powers and welding directions to explore the feasibility of technology. The properties evolution, and weldability of the laser-welded wire arc additive manufactured Al-Cu alloy joints are investigated. The results indicate that the wire arc additive manufactured Al-Cu alloy has excellent laser weldability without apparent detection. The microstructures of the laser-welded joints consist of columnar grains, dendrites and ne equiaxed grains. The 3500 W laser power joint has higher tensile strength and elongation than other laser powers, reaching 203.48 MPa, 4.13%. Compared with the different welding direction joints, "0°and 0°" has the higher tensile strength and elongation, reaching 180.77 MPa, 2.40%. The microstructures have a weak effect, but the anisotropy plays a signi cant role in the tensile properties. This study has demonstrated that it is possible to laser-welded WAAM samples, and provide solutions that AM technology di cultly produces large size parts.

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Fatigue of wire+arc additive manufactured Ti-6Al-4V in presence of process-induced porosity defects

Cited by 34 publications

References 41 publications

Fatigue of laser powder-bed fusion additive manufactured Ti-6Al-4V in presence of process-induced porosity defects

Fatigue of laser powder-bed fusion additive manufactured Ti-6Al-4V in presence of process-induced porosity defects

Fatigue Performance of Titanium–Aluminum–Vanadium Alloy Fabricated by Laser-Wire-Based Directed Energy Deposition Forming Dot-Shaped Beads

Weld morphology, microstructure evolution, and mechanical properties of laser beam welding of wire arc additive manufactured Al-Cu substrate

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