The effect of the parameters of the powder bed fusion process on the microstructure and mechanical properties of CrFeCoNi medium-entropy alloys

Kuzminova, Yulia O.; Firsov, Denis G.; Дудин, А. А.; Sergeev, S. N.; Zhilyaev, Alexander P.; D’yakov, A. V.; Chupeeva, A.; Алексеев, А. А.; Martynov, Dmitry V.; Akhatov, Iskander; Evlashin, Stanislav A.

doi:10.1016/j.intermet.2019.106651

Cited by 43 publications

(15 citation statements)

References 24 publications

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“…The CrFeCoNi alloy was performed using the widely used laser powder bed fusion (L-PBF) additive manufacturing technique. TruPrint 1000 metal 3D printer (TRUMPF) was used in the current work to manufacture the samples with the selected printing process parameters according to the results from the previous study [18]. A full list of the applied parameters is shown in Table 2.…”

Section: Printing Processmentioning

confidence: 99%

“…In previous works, the precipitates observed in a CrFeCoNi microstructure after annealing at 750 ℃ and 800 ℃ are considered as the σ-phase [18,23]. In order to examine detailed structure of the secondary phase in the alloy heated at different temperatures and treatment time, TEM diffraction analysis was performed for the alloy after annealing for 24 h. Fig.…”

Section: Microstructural Evolution Upon the Annealingmentioning

confidence: 99%

“…HEAs are actively constructed through the application of the modern manufacturing techniques such as Additive Manufacturing (AM) [15,16]. For the AM process, post-printing heat treatment of the as-built materials is often applied to remove residual stresses, but it leads to structural changes including recrystallization and secondary phase formations [17][18][19]. Synthesis of CoCrFeMnNi alloys is common by the AM process due to their nature with a ductile fcc structure as matrix, which provides stable printability [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Phase and structural changes during heat treatment of additive manufactured CrFeCoNi high-entropy alloy

Kuzminova

Kudryavtsev

Han

et al. 2021

Journal of Alloys and Compounds

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Section: Printing Processmentioning

confidence: 99%

Section: Microstructural Evolution Upon the Annealingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phase and structural changes during heat treatment of additive manufactured CrFeCoNi high-entropy alloy

Kuzminova

Kudryavtsev

Han

et al. 2021

Journal of Alloys and Compounds

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“…The properties of the final part highly depend on certain process parameters, such as the laser velocity and power density, scanning strategy, hatch spacing, and thickness of the printed layers [10,11]. The combination of these parameters can be used to fabricate structures with typical defects present in AM metallic parts, such as a lack of fusion, voids, and microcracks induced by residual stresses [12].…”

Section: Introductionmentioning

confidence: 99%

Very High Cycle Fatigue Behavior of Additively Manufactured 316L Stainless Steel

et al. 2020

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The present paper is focused on an experimental study of the damage-to-failure mechanism of additively manufactured 316L stainless steel specimens subjected to very high cycle fatigue (VHCF) loading. Ultrasonic axial tension-compression tests were carried out on specimens for up to 109 cycles, and fracture surface analysis was performed. A fine granular area (FGA) surrounding internal defects was observed and formed a “fish-eye” fracture type. Nonmetallic inclusions and the lack of fusion within the fracture surfaces that were observed with SEM were assumed to be sources of damage initiation and growth of the FGAs. The characteristic diameter of the FGAs was ≈500 μm on the fracture surface and were induced by nonmetallic inclusions; this characteristic diameter was the same as that for the fracture surface induced by a lack of fusion. Fracture surfaces corresponding to the high cycle fatigue (HCF) regime were discussed as well to emphasize damage features related to the VHCF regime.

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“…HEAs fabricated using SLM exhibited outstanding strength and ductility superior to their conventionally fabricated and post-processed counterpart and comparable to the conventional materials such as stainless steel [351,356,[369][370][371][372]. The tensile and compressive strength of CoCrFeMnNi HEA has been investigated by many researchers [356,[372][373][374][375].…”

Section: Laser-processed Heasmentioning

confidence: 99%

Review of Powder Bed Fusion Additive Manufacturing for Metals

Ladani

Sadeghilaridjani

2021

Metals

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Additive manufacturing (AM) as a disruptive technology has received much attention in recent years. In practice, however, much effort is focused on the AM of polymers. It is comparatively more expensive and more challenging to additively manufacture metallic parts due to their high temperature, the cost of producing powders, and capital outlays for metal additive manufacturing equipment. The main technology currently used by numerous companies in the aerospace and biomedical sectors to fabricate metallic parts is powder bed technology, in which either electron or laser beams are used to melt and fuse the powder particles line by line to make a three-dimensional part. Since this technology is new and also sought by manufacturers, many scientific questions have arisen that need to be answered. This manuscript gives an introduction to the technology and common materials and applications. Furthermore, the microstructure and quality of parts made using powder bed technology for several materials that are commonly fabricated using this technology are reviewed and the effects of several process parameters investigated in the literature are examined. New advances in fabricating highly conductive metals such as copper and aluminum are discussed and potential for future improvements is explored.

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The effect of the parameters of the powder bed fusion process on the microstructure and mechanical properties of CrFeCoNi medium-entropy alloys

Cited by 43 publications

References 24 publications

Phase and structural changes during heat treatment of additive manufactured CrFeCoNi high-entropy alloy

Phase and structural changes during heat treatment of additive manufactured CrFeCoNi high-entropy alloy

Very High Cycle Fatigue Behavior of Additively Manufactured 316L Stainless Steel

Review of Powder Bed Fusion Additive Manufacturing for Metals

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