Structure and properties of the CrMnFeCoNi high-entropy alloy irradiated with a pulsed electron beam

Громов, В. Е.; Коновалов, С. В.; Ivanov, Yu. F.; Shlyarova, Yu. A.; Vorobyov, S.V.; Семин, А. П.

doi:10.1016/j.jmrt.2022.06.108

Cited by 14 publications

(6 citation statements)

References 35 publications

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“…According to Shen et al [ 201 ], the AM HEA produced using wire DED with seven different wires (one Fe wires, two Ni wires, two Al wires, one Co wire and one 304 stainless steel wire) had similar mechanical properties to those of the cast alloy made with the same wires as feedstock material for the AMF process. Other studies [ 202 , 203 ] have demonstrated that the use of three non-pure welding wires can form a single solid solution, as shown in Figure 14 .…”

Section: Additive Manufacturing (Am) Technologies Of High Entropy All...mentioning

confidence: 96%

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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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Section: Additive Manufacturing (Am) Technologies Of High Entropy All...mentioning

confidence: 96%

“… The effect of different AM technologies on tensile strength of CrMnFeCoNi HEA in terms of YS, UTS, and elongation. L-PBF [ 45 , 74 , 75 , 82 , 84 , 87 , 203 ], EB-PBF [ 115 ], L-DED [ 160 , 168 , 170 , 171 , 172 , 173 , 174 , 180 ], WAAM [ 202 ], AMF [ 87 , 172 , 246 ]. …”

Section: Figurementioning

confidence: 99%

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

2023

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“…Alloys in the Co-Cr-Fe-Ni system are among the best-studied HEAs. In particular, many researchers have demonstrated that it is possible to manufacture materials with high strength and ductility in the CoCrFeMnNi (the Cantor alloy) [ 31 , 32 , 33 , 34 ], AlCoCrFeNi [ 35 , 36 ], and CoCrFeNiV systems [ 37 ]. Copper is an ideal candidate for being used as one of the components of Fe-Co-Ni-Cr-based HEAs because its physical and chemical characteristics (its atomic radius, melting point, and Young’s modulus) are close to those of Fe, Co, Ni, and Cr.…”

Section: Introductionmentioning

confidence: 99%

Manufacturing of Metal–Diamond Composites with High-Strength CoCrCuxFeNi High-Entropy Alloy Used as a Binder

et al. 2023

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This paper focuses on the study of the structure and mechanical properties of CoCrCuxFeNi high-entropy alloys and their adhesion to single diamond crystals. CoCrCuxFeNi alloys were manufactured by the powder metallurgy route, specifically via mechanical alloying of elemental powders, followed by hot pressing. The addition of copper led to the formation of a dual-phase FCC + FCC2 structure. The CoCrCu0.5FeNi alloy exhibited the highest ultimate tensile strength (1080 MPa). Reductions in the ductility of the CoCrCuxFeNi HEAs and the tendency for brittle fracture behavior were observed at high copper concentrations. The equiatomic alloys CoCrFeNi and CoCrCuFeNi demonstrated high adhesion strength to single diamond crystals. The diamond surface at the fracture of the composites having the CoCrFeNi matrix had chromium-rich metal matrix regions, thus indicating that chromium carbide, responsible for adhesion, was formed at the composite–diamond interface. Copper-rich areas were detected on the diamond surface within the composites having the CoCrCuFeNi matrix due to the predominant precipitation of the FCC2 phase at the interfaces or the crack propagation along the FCC/FCC2 interface, resulting in the exposure of the Cu-rich FCC2 phase on the surface.

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“…The heating and cooling rates can reach quite high values (10 4 -10 5 K/s), resulting in a transformation in the microstructure, phase and chemical composition, formation of a preferred crystallographic orientation, changes in the surface topography, etc. [9,10]. The technological conditions of the process can be selected so that the treated surface is melted-the formation of a melt pool.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Titanium Borides by Electron Beam Surface Alloying

Padikova,

Nedeva,

Dunchev

et al. 2023

Coatings

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This study shows the possibility of the fabrication of titanium borides by an alloying of a titanium substrate with boron powder via a scanning electron beam. During the electron beam alloying experiments, the speed movement of the specimens was varied, where it was 4 and 6 mm/s. The thickness of the alloyed zone formed by the lower velocity of the movement of the workpiece is greater than that of the coating obtained by the higher speed movement. The phase composition of the coatings is in the form of the TiB2 phase, as well as some amount of undissolved boron in both considered cases. In the case of the lower speed of the movement of the sample, the undissolved boron is within the whole volume of the alloyed zone, while at the higher speed movement, it is on the top of the specimen. The hardness of the obtained coatings by the higher speed of the specimen movement reached values of about 4500 HV. Considering the values of the surface alloy fabricated via the lower velocity movement of 4 mm/s, it is about 2500 HV, which is lower than that of the one obtained by the 6 mm/s speed of the sample movement. The result obtained for the friction coefficient (COF) for the specimen alloyed by the speed of the specimen motion of 4 mm/s is 0.40; the value for the coating obtained at a speed movement of 6 mm/s is 0.34. In both cases, these values are lower than that of the titanium substrate.

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Structure and properties of the CrMnFeCoNi high-entropy alloy irradiated with a pulsed electron beam

Cited by 14 publications

References 35 publications

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

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

Manufacturing of Metal–Diamond Composites with High-Strength CoCrCuxFeNi High-Entropy Alloy Used as a Binder

Fabrication and Characterization of Titanium Borides by Electron Beam Surface Alloying

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