Enhanced tensile yield strength in laser additively manufactured Al0.3CoCrFeNi high entropy alloy

Nartu, M.S.K.K.Y.; Alam, Talukder; Dasari, Sriswaroop; Mantri, S.A.; Gorsse, Stéphane; Siller, Héctor R.; Dahotre, Narendra B.; Banerjee, R.

doi:10.1016/j.mtla.2019.100522

Cited by 60 publications

(10 citation statements)

References 47 publications

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“… The effect of different AM technologies on tensile strength of Al 0.3 CrFeCoNi HEA in terms of YS, UTS and elongation. L-PBF [ 53 , 105 ], L-DED [ 145 , 146 ], AMF [ 247 , 248 ]. …”

Section: Figurementioning

confidence: 99%

Additive Manufacturing Technologies of High Entropy Alloys (HEA): Review and Prospects

2023

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Additive manufacturing (AM) technologies have gained considerable attention in recent years as an innovative method to produce high entropy alloy (HEA) components. The unique and excellent mechanical and environmental properties of HEAs can be used in various demanding applications, such as the aerospace and automotive industries. This review paper aims to inspect the status and prospects of research and development related to the production of HEAs by AM technologies. Several AM processes can be used to fabricate HEA components, mainly powder bed fusion (PBF), direct energy deposition (DED), material extrusion (ME), and binder jetting (BJ). PBF technologies, such as selective laser melting (SLM) and electron beam melting (EBM), have been widely used to produce HEA components with good dimensional accuracy and surface finish. DED techniques, such as blown powder deposition (BPD) and wire arc AM (WAAM), that have high deposition rates can be used to produce large, custom-made parts with relatively reduced surface finish quality. BJ and ME techniques can be used to produce green bodies that require subsequent sintering to obtain adequate density. The use of AM to produce HEA components provides the ability to make complex shapes and create composite materials with reinforced particles. However, the microstructure and mechanical properties of AM-produced HEAs can be significantly affected by the processing parameters and post-processing heat treatment, but overall, AM technology appears to be a promising approach for producing advanced HEA components with unique properties. This paper reviews the various technologies and associated aspects of AM for HEAs. The concluding remarks highlight the critical effect of the printing parameters in relation to the complex synthesis mechanism of HEA elements that is required to obtain adequate properties. In addition, the importance of using feedstock material in the form of mix elemental powder or wires rather than pre-alloyed substance is also emphasized in order that HEA components can be produced by AM processes at an affordable cost.

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“… The effect of different AM technologies on tensile strength of Al 0.3 CrFeCoNi HEA in terms of YS, UTS and elongation. L-PBF [ 53 , 105 ], L-DED [ 145 , 146 ], AMF [ 247 , 248 ]. …”

Section: Figurementioning

confidence: 99%

Additive Manufacturing Technologies of High Entropy Alloys (HEA): Review and Prospects

2023

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“…Additionally, DED has some advantages for the fabrication of bulk MPEA components. These advantages derive from the powder/ wire feed systems that enable changes in composition during the DED process across different layers which provides significant potential for fabricating functionally graded MPEA components with tailorable compositions, microstructures, and properties [73][74][75][76][77]. Without the manufacturing size limitation of the PBF, DED is reported to be able to fabricate large MPEA components (e.g., up to 5000 9 3000 9 1000 mm 3 ) with a high deposition rate (up to 300 cm 3 /h) [36,78].…”

Section: Directed Energy Deposition (Ded)mentioning

confidence: 99%

Review: Multi-principal element alloys by additive manufacturing

Ferry

Kruzic

et al. 2022

J Mater Sci

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Multi-principal element alloys (MPEAs) have attracted rapidly growing attention from both research institutions and industry due to their unique microstructures and outstanding physical and chemical properties. However, the fabrication of MPEAs with desired microstructures and properties using conventional manufacturing techniques (e.g., casting) is still challenging. With the recent emergence of additive manufacturing (AM) techniques, the fabrication of MPEAs with locally tailorable microstructures and excellent mechanical properties has become possible. Therefore, it is of paramount importance to understand the key aspects of the AM processes that influence the microstructural features of AM fabricated MPEAs including porosity, anisotropy, and heterogeneity, as well as the corresponding impact on the properties. As such, this review will first present the state-of-the-art in existing AM techniques to process MPEAs. This is followed by a discussion of the microstructural features, mechanisms of microstructural evolution, and the mechanical properties of the AM fabricated MPEAs. Finally, the current challenges and future research directions are summarized with the aim to promote the further development and implementation of AM for processing MPEAs for future industrial applications.

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“…This indicated that CALPHAD based models were useful for predicting the phases formed in HEAs with complex components, but that the current thermodynamic database needs to be improved. Nartu et al (2020) investigated the effect of heat treatment on the microstructural evolution and mechanical properties of laser additively manufactured Al 0.3 CrFeCoNi HEA. The formation of the nano-scaled (Al, Ni)-rich clusters resulted from in-situ heat treatment during the part building and could act as the heterogeneous nucleation sites for the precipitates that form at high temperature aging.…”

Section: Thermodynamic Ways Of Annealingmentioning

confidence: 99%

Thermal–Mechanical Processing and Strengthen in AlxCoCrFeNi High-Entropy Alloys

Yang

Wang

et al. 2021

Front. Mater.

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In this study high-entropy alloys (HEAs) were devised based on a new alloy design concept, which breaks with traditional design methods for conventional alloys. As a novel alloy, HEAs have demonstrated excellent engineering properties and possible combinations of diverse properties for their unique tunable microstructures and properties. This review article explains the phase transition mechanism and mechanical properties of high-entropy alloys under the thermal-mechanical coupling effect, which is conducive to deepening the role of deformation combines annealing on the structure control and performance improvement of high-entropy alloys, giving HEAs a series of outstanding performance and engineering application prospect. To reach this goal we have explored the microstructural evolution, formation of secondary phases at high and/or intermediate temperatures and their effect on the mechanical properties of the well known AlxCoCrFeNi HEAs system, which not only has an important role in deepening the understanding of phase transition mechanism in AlxCoCrFeNi HEAs, but also has important engineering application value for promoting the application of high-entropy alloys.

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Enhanced tensile yield strength in laser additively manufactured Al0.3CoCrFeNi high entropy alloy

Cited by 60 publications

References 47 publications

Additive Manufacturing Technologies of High Entropy Alloys (HEA): Review and Prospects

Additive Manufacturing Technologies of High Entropy Alloys (HEA): Review and Prospects

Review: Multi-principal element alloys by additive manufacturing

Thermal–Mechanical Processing and Strengthen in AlxCoCrFeNi High-Entropy Alloys

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