Carbide precipitation strengthening in fine-grained carbon-doped FeCoCrNiMn high entropy alloy

Peng, Jian; Li, Ziyong; Fu, Liming; Ji, Xinbo; Pang, Zhuorui; Shan, Aidang

doi:10.1016/j.jallcom.2019.06.204

Cited by 95 publications

(29 citation statements)

References 37 publications

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“…Having the lowest SPST possible is highly desirable as it minimizes the thermal activation energy available for undesirable solid-solid phase transitions to occur below this temperature. Peng et al [40] have demonstrated that carbon doping improves the mechanical properties of FeCoCrNiMn, strengthening it by the precipitation of M 23 C 6 carbides and inhibiting the recrystallized grain growth of the FCC matrix. Peng et al [40] only studied the specific composition FeCoCrNiMn-1.3C.…”

Section: Multi-objective Materials Selectionmentioning

confidence: 99%

“…Peng et al [40] have demonstrated that carbon doping improves the mechanical properties of FeCoCrNiMn, strengthening it by the precipitation of M 23 C 6 carbides and inhibiting the recrystallized grain growth of the FCC matrix. Peng et al [40] only studied the specific composition FeCoCrNiMn-1.3C. We intend to optimize the mechanical properties of FeCoCrNiMn by carbon doping.…”

Section: Multi-objective Materials Selectionmentioning

confidence: 99%

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On the Application of the FactSage Thermochemical Software and Databases in Materials Science and Pyrometallurgy

et al. 2020

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The discovery of new metallic materials is of prime importance for the development of new technologies in many fields such as electronics, aerial and ground transportation as well as construction. These materials require metals which are obtained from various pyrometallurgical processes. Moreover, these materials need to be synthesized under extreme conditions of temperature where liquid solutions are produced and need to be contained. The design and optimization of all these pyrometallurgical processes is a key factor in this development. We present several examples in which computational thermochemistry is used to simulate complex pyrometallurgical processes including the Hall–Heroult process (Al production), the PTVI process (Ni production), and the steel deoxidation from an overall mass balance and energy balance perspective. We also show how computational thermochemistry can assist in the material selection in these extreme operation conditions to select refractory materials in contact with metallic melts. The FactSage thermochemical software and its specialized databases are used to perform these simulations which are proven here to match available data found in the literature.

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Section: Multi-objective Materials Selectionmentioning

confidence: 99%

Section: Multi-objective Materials Selectionmentioning

confidence: 99%

On the Application of the FactSage Thermochemical Software and Databases in Materials Science and Pyrometallurgy

et al. 2020

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“…It should be noted that 80~90% of carbon precipitated out as carbides after annealing at 850 • C. The theoretical carbide volume fraction(f) can be calculated from the phase density, atomic fraction and relative atomic mass assuming that most carbides are M 23 C 6 type carbides as observed in Figures 4 and 5. The lattice constant of CoNiCrFe alloy (a = 0.355 nm) is used to estimate the density of CoNiCrFe alloy (8.0 g/cm 3 ), while the density of M 23 C 6 is sourced to Cr 23 C 6 (7.0 g/cm 3 ) as presented in reference [48]. The relative atomic mass of M in M 23 C 6 is taken from the average of Co, Ni, Cr and Fe (56.4 g/mol).…”

Section: Estimation Of Carbon Partitioning Into Carbides and Interstimentioning

confidence: 99%

Mechanical Performance and Microstructural Evolution of (NiCo)75Cr17Fe8Cx (x = 0~0.83) Medium Entropy Alloys at Room and Cryogenic Temperatures

Song

Lee

Moon

et al. 2020

Metals

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We investigated the effects of the addition of Co and carbon on the deformation behavior of new medium-entropy alloys (MEAs) designed by increasing the entropy of the conventional NiCrFe-type Alloy 600. The strength/ductility combination of carbon-free (NiCo)75Cr17Fe8 MEA was found to be 729 MPa/81% at 298 K and it increased to a remarkable 1212 MPa/106% at 77 K. The excellent strength and ductility of (NiCo)75Cr17Fe8 at cryogenic temperature is attributed to the increased strain hardening rate caused by the interaction between dislocation slip and deformation twins. Strength/ductility combinations of carbon-doped (NiCo)75Cr17Fe8C0.34 and (NiCo)75Cr17Fe8C0.83 at cryogenic temperature were observed to be 1321 MPa/96% and 1398 MPa/66%, respectively, both of which are superior to those of other high-entropy alloys (HEAs). Strength/ductility combinations of (NiCo)75Cr17Fe8C0.34 and (NiCo)75Cr17Fe8C0.83 at room temperature were found to be 831 MPa/72% and 942 MPa/55%, respectively and both are far superior to 676 MPa/41% of the commercial Alloy 600. Yield strengths of carbon-free and carbon-doped alloys comprised strengthening components from the friction stress, grain size strengthening, carbide strengthening and interstitial strengthening and excellent agreement between the predictions and the experiments was obtained. A design strategy to develop new MEAs by increasing the entropy of the conventional alloys was found to be effective in enhancing the mechanical performance.

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“…Additionally, Zhuang et al [ 16 ] found that the addition of Mo into Al 0.5 CoCrFeNi HEA could enhance the formation of a (Cr, Mo)-rich σ phase and adjust the mechanical properties of the Al 0.5 CoCrFeNiMo x HEAs, including hardness, strength, and ductility. Jian et al [ 17 ] suggested that the addition of C could promote the formation of carbides and induce precipitation strengthening. Jian et al [ 17 ] also found that carbide precipitation could inhibit grain growth during recrystallization.…”

Section: Introductionmentioning

confidence: 99%

“…Jian et al [ 17 ] suggested that the addition of C could promote the formation of carbides and induce precipitation strengthening. Jian et al [ 17 ] also found that carbide precipitation could inhibit grain growth during recrystallization. The powder metallurgy method provides a promising way to prepare the Al 0.5 CoCrFeNi HEA reinforced by Mo and C elements.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Mechanical Properties and Microstructure of an (Al0.5CoCrFeNi)0.95Mo0.025C0.025 High Entropy Alloy

Wang

Liu

et al. 2019

Entropy

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The dynamic mechanical properties and microstructure of the (Al0.5CoCrFeNi)0.95Mo0.025C0.025 high entropy alloy (HEA) prepared by powder extrusion were investigated by a split Hopkinson pressure bar and electron probe microanalyzer and scanning electron microscope. The (Al0.5CoCrFeNi)0.95Mo0.025C0.025 HEA has a uniform face-centered cubic plus body-centered cubic solid solution structure and a fine grain-sized microstructure with a size of about 2 microns. The HEA possesses an excellent strain hardening rate and high strain rate sensitivity at a high strain rate. The Johnson–Cook plastic model was used to describe the dynamic flow behavior. Hat-shaped specimens with different nominal strain levels were used to investigate forced shear localization. After dynamic deformation, a thin and short shear band was generated in the designed shear zone and then the specimen quickly fractured along the shear band.

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Carbide precipitation strengthening in fine-grained carbon-doped FeCoCrNiMn high entropy alloy

Cited by 95 publications

References 37 publications

On the Application of the FactSage Thermochemical Software and Databases in Materials Science and Pyrometallurgy

On the Application of the FactSage Thermochemical Software and Databases in Materials Science and Pyrometallurgy

Mechanical Performance and Microstructural Evolution of (NiCo)75Cr17Fe8Cx (x = 0~0.83) Medium Entropy Alloys at Room and Cryogenic Temperatures

Dynamic Mechanical Properties and Microstructure of an (Al0.5CoCrFeNi)0.95Mo0.025C0.025 High Entropy Alloy

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