In-situ synchrotron X-ray diffraction analysis of the elastic behaviour of martensite and H-phase in a NiTiHf high temperature shape memory alloy fabricated by laser powder bed fusion

Shen, Jiajia; Zeng, Zhi; Nematollahi, Mohammadreza; Schell, Norbert; Maawad, Emad; Vasin, R. N.; Safaei, Keyvan; Poorganji, Behrang; Elahinia, Mohammad; Oliveira, J.P.

doi:10.1016/j.addlet.2021.100003

Cited by 33 publications

(9 citation statements)

References 25 publications

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“…In contrast to conventional manufacturing methods, additive manufacturing (AM) methods like laser powder bed fusion (LPBF) or electron beam melting (EBM) provide a unique way of fabricating complex geometries with almost no limitations in design, opening new prospective in several fields like biomedical, automotive, and aerospace [3] . AM of the most commonly used Ni-Ti-based SMAs has attracted significant attention in the last decades because of the excellent functional and mechanical properties of the alloys (such as low elastic anisotropy, mechanical strength, biocompatibility, corrosion resistance, enhanced shape memory properties) coupled with the increased freedom of design enabled by AM [4][5][6][7][8] . However, the high cost of raw material and the extreme sensitivity of functional properties on chemical composition represent the main drawbacks of this class of materials [9] .…”

Section: Introductionmentioning

confidence: 99%

Control of microstructure and shape memory properties of a Fe-Mn-Si-based shape memory alloy during laser powder bed fusion

Ferretto

Borzì

Kim

et al. 2022

Additive Manufacturing Letters

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Section: Introductionmentioning

confidence: 99%

Control of microstructure and shape memory properties of a Fe-Mn-Si-based shape memory alloy during laser powder bed fusion

Ferretto

Borzì

Kim

et al. 2022

Additive Manufacturing Letters

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“…Improving the efficiency and quality of thick-plate welding has always been an emphasis of welding experiments [ 1 , 2 , 3 ]. Large grooves are required for thick plates in traditional welding methods, which leads to an increase in the filling quantity of welding wire and consequently to an increase in cost.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics of Plasma in Ultrasonic-Assisted Narrow-Gap Laser Welding with Filler Wire

Ren

Kan

et al. 2023

Materials

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Laser welding with filler wire was applied to Q345D in a narrow gap under ultrasonic assistance, and the dynamic characteristics of plasma were studied by high-speed imaging and spectral acquisition. The results showed that the plasma area decreased gradually with increasing distance between the ultrasonic loading position and welding seam. The electron density and temperature of the plasma with ultrasonic assistance were higher than those without ultrasound. The electron density was approximately 1016~1017 cm−3, and the plasma temperature was approximately 4000~6000 K. Ultrasonic assisted laser wire filling welding can bring about cavitation effect and significantly reduce the porosity problem.

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“…One industry that is making increasing use of metal AM is the aerospace industry [ 2 – 5 ] where revenues are expected to be US$430 billion by the year 2025 [ 3 ]. Powder bed fusion (PBF) and directed energy deposition (DED) techniques are mostly used metal AM techniques for the defence, aerospace, energy and biomedical industries due to their outstanding advantages [ 6 – 9 ].…”

Section: Introductionmentioning

confidence: 99%

Digitisation of metal AM for part microstructure and property control

et al. 2022

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Metal additive manufacturing, which uses a layer-by-layer approach to fabricate parts, has many potential advantages over conventional techniques, including the ability to produced complex geometries, fast new design part production, personalised production, have lower cost and produce less material waste. While these advantages make AM an attractive option for industry, determining process parameters which result in specific properties, such as the level of porosity and tensile strength, can be a long and costly endeavour. In this review, the state-of-the-art in the control of part properties in AM is examined, including the effect of microstructure on part properties. The simulation of microstructure formation via numerical simulation and machine learning is examined which can provide process quality control and has the potential to aid in rapid process optimisation via closed loop control. In-situ monitoring of the AM process, is also discussed as a route to enable first time right production in the AM process, along with the hybrid approach of AM fabrication with post-processing steps such as shock peening, heat treatment and rolling. At the end of the paper, an outlook is presented with a view towards potential avenues for further research required in the field of metal AM.

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In-situ synchrotron X-ray diffraction analysis of the elastic behaviour of martensite and H-phase in a NiTiHf high temperature shape memory alloy fabricated by laser powder bed fusion

Cited by 33 publications

References 25 publications

Control of microstructure and shape memory properties of a Fe-Mn-Si-based shape memory alloy during laser powder bed fusion

Control of microstructure and shape memory properties of a Fe-Mn-Si-based shape memory alloy during laser powder bed fusion

Dynamic Characteristics of Plasma in Ultrasonic-Assisted Narrow-Gap Laser Welding with Filler Wire

Digitisation of metal AM for part microstructure and property control

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