Influence of Manufacturing Conditions on Inclusion Characteristics and Mechanical Properties of FeCrNiMnCo Alloy

Choi, Nuri; Park, Nokeun; Kim, Jin-kyung; Karasev, Andrey; Jönsson, Pär G.; Park, Joo Hyun

doi:10.3390/met10101286

Cited by 18 publications

(5 citation statements)

References 60 publications

(87 reference statements)

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“…However, since the volumetric fraction of these impurities was less than 1% according to Table 1, the corresponding XRD spectrum (Figure 2) has possibly not shown its presence. As emphasized in [29,32], non-metallic inclusions could be found EM mapping of the cross-section of the dendrites is presented in Figure 4. The transversal size of the dendrites is 7.7 ± 0.4 µm, which confirms the results of the optical microscopy.…”

Section: Resultsmentioning

confidence: 85%

“…However, since the volumetric fraction of these impurities was less than 1% according to Table 1, the corresponding XRD spectrum (Figure 2) has possibly not shown its presence. As emphasized in [29,32], non-metallic inclusions could be found even in the equiatomic FeCrNiMnCo alloys melted under vacuum or using an inert gas atmosphere. For example, Al 2 O 3 inclusions can be formed due to the high affinity between aluminum and oxygen, which were observed in an FeCrNiMnCo alloy [33].…”

Section: Resultsmentioning

confidence: 86%

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Investigation of Co-Cr-Fe-Mn-Ni Non-Equiatomic High-Entropy Alloy Fabricated by Wire Arc Additive Manufacturing

Осинцев

Konovalov

Zagulyaev

et al. 2022

Metals

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Fabrication of high-entropy alloys (HEAs) is a crucial area of interest for materials scientists since these metallic materials may have many practical uses. Wire arc additive manufacturing (WAAM), unlike other additive technologies, has tangible benefits for making large-sized components, but manufacturing the wire from HEAs is still very limited. Recent studies suggested tackling this problem using a combined cable composed of wires consisting of pure elements as feeding material. However, not all compositions of HEAs can be obtained by the pure elements’ wires because the number of them is limited. This study aims to examine phase composition, chemical elements distribution, microstructure, and mechanical properties of a Co-Cr-Fe-Mn-Ni HEA, which was not previously obtained by the WAAM. The cable-type wire used in this study is composed of two wires which consist of Cr, Fe, Mn, and Ni, and one pure Co wire. The phase composition, chemical elements distribution, microstructure, and mechanical properties were investigated. The prepared high-entropy alloy has non-equiatomic chemical composition with a single-phase FCC crystal structure with homogeneously distributed elements inside the grains. The microstructure examinations showed dendrite structure which is typical for WAAM processes. The compressive yield strength of the alloy is ~279 MPa, the ultimate compressive strength is ~1689 MPa, the elongation is 63%, and the microhardness is ~150 HV, which was found to be similar to the previously fabricated Co-Cr-Fe-Mn-Ni alloys by other methods. Fracture analysis confirmed the ductile behavior of deformation by the presence of dimples.

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Section: Resultsmentioning

confidence: 85%

“…However, since the volumetric fraction of these impurities was less than 1% according to Table 1, the corresponding XRD spectrum (Figure 2) has possibly not shown its presence. As emphasized in [29,32], non-metallic inclusions could be found even in the equiatomic FeCrNiMnCo alloys melted under vacuum or using an inert gas atmosphere. For example, Al 2 O 3 inclusions can be formed due to the high affinity between aluminum and oxygen, which were observed in an FeCrNiMnCo alloy [33].…”

Section: Resultsmentioning

confidence: 86%

Investigation of Co-Cr-Fe-Mn-Ni Non-Equiatomic High-Entropy Alloy Fabricated by Wire Arc Additive Manufacturing

Осинцев

Konovalov

Zagulyaev

et al. 2022

Metals

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“…Previous studies demonstrated that the chemical composition and routes of their formation strongly influence the microstructure and subsequent physical and mechanical behavior [1]. There are various methods of fabrication of bulk HEAs: vacuum arc melting [2], vacuum induction melting [3], selective laser melting [4] and additive manufacturing methods such as wire-arc additive manufacturing [5] and laser cladding [6].…”

Section: Introductionmentioning

confidence: 99%

Modeling the mechanism of micro / nanostructured surface formation in Al-Co-Cr-Fe-Ni and Co-Cr-Fe-Mn-Ni high-entropy alloys treated with a high current pulsed electron beam

et al. 2022

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In this work, we investigated, using transmission and scanning electron microscopy, the microstructure of Al-Co-Cr-Fe-Ni and Co-Cr-Fe-Mn-Ni non-equimolar high-entropy alloys treated by high current pulsed electron beams with an energy density of 30 J / cm 2 . Both alloys revealed a cellular crystallization structure with an average cell size of 192 ± 5 nm, and 453 ± 6 nm, correspondingly. The study aims to improve the model of the mechanism of formation of micro-and nanostructured surface layers taking into account combined thermocapillary, concentration-capillary, evaporative-capillary and thermoelectric instabilities at the melt-plasma interface. The results of the linear stability analysis showed that the absorbed power density is lost by evaporation that leads to a decrease in the values of the gradient of the undisturbed temperature and, an increase in the wavelength at which the maximum rate of growth of disturbances is observed. An analysis of the dispersion equation showed that the values of the wavelengths of disturbances on the surface of alloys in the liquid phase are 454 nm for Co-Cr-Fe-Mn-Ni and 189 nm for Al-Co-Cr-Fe-Ni, which deviate from the experimental data by no more than 2 %.

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“…Many HEAs. such as FeCoCrNiMn and AlCoCrFeNi, were developed based on FeCoCrNi [26][27][28]. In this study, FeCoCrNi HEAp was used as a reinforcement to prepare AMCs.…”

Section: Introductionmentioning

confidence: 99%

Study on Mechanical Properties and Microstructure of FeCoCrNi/Al Composites via Cryorolling

Luo

Zhang

et al. 2022

Metals

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Aluminum matrix composites (AMCs) reinforced by 1.5 and 3 wt% FeCoCrNi high-entropy alloy particles (HEAp) were obtained by a stir casting process. The AMCs strip was further prepared by room temperature rolling (RTR, 298 K) and cryorolling (CR, 77 K). The mechanical properties of the AMCs produced by RTR and CR were studied. The effect of a microstructure on mechanical properties of composites was analyzed by scanning electron microscopy (SEM). The results show that CR can greatly improve the mechanical properties of the HEAp/AMCs. Under 30% rolling reduction, the ultimate tensile strength (UTS) of the RTR 1.5 wt% HEAp/AMCs was 120.3 MPa, but it increased to 139.7 MPa in CR composites. Due to the volume shrinkage effect, the bonding ability of CR HEAp/AMCs reinforcement with Al matrix was stronger, exhibiting higher mechanical properties.

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Influence of Manufacturing Conditions on Inclusion Characteristics and Mechanical Properties of FeCrNiMnCo Alloy

Cited by 18 publications

References 60 publications

Investigation of Co-Cr-Fe-Mn-Ni Non-Equiatomic High-Entropy Alloy Fabricated by Wire Arc Additive Manufacturing

Investigation of Co-Cr-Fe-Mn-Ni Non-Equiatomic High-Entropy Alloy Fabricated by Wire Arc Additive Manufacturing

Modeling the mechanism of micro / nanostructured surface formation in Al-Co-Cr-Fe-Ni and Co-Cr-Fe-Mn-Ni high-entropy alloys treated with a high current pulsed electron beam

Study on Mechanical Properties and Microstructure of FeCoCrNi/Al Composites via Cryorolling

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