Structure and tensile properties of Mx(MnFeCoNi)100-x solid solution strengthened high entropy alloys

Wen, Dongsheng; Chang, Chia-Hsiu; Matsunaga, Sae; Park, Gyuchul; Ecker, Lynne; Gill, Simerjeet K.; Topsakal, Mehmet; Okuniewski, Maria A.; Antonov, Stoichko; Johnson, David R.; Titus, Michael S.

doi:10.1016/j.mtla.2019.100539

Cited by 10 publications

(2 citation statements)

References 69 publications

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“…The clearly observed Cu‐rich precipitates have not been detected by XRD analysis probably due to the same crystal structure and very similar lattice constants. The microstructure and mechanical properties of the Cu‐free subset, MnFeCoNi have been reported previously and are relatively clear, [ 34,61,62 ] which is considered as a single‐phase FCC structure. This composition is mainly for comparison with other Cu‐containing HEAs here.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and Mechanical Properties of Face‐Centered‐Cubic‐Based Cr‐Free Equiatomic High‐Entropy Alloys

Liu

Zhang

et al. 2020

Adv Eng Mater

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High‐entropy alloys (HEAs) with face‐centered‐cubic (FCC) structures, e.g., the typical CrMnFeCoNi HEA, have a strong tendency to precipitate brittle sigma phases, as Cr is a strong sigma stabilizer. To develop HEAs with alleviated concerns of sigma phases, Cu for Cr in the Cr‐Mn‐Fe‐Co‐Ni HEA system is substituted to form a Mn‐Fe‐Co‐Ni‐Cu system. The quinary alloy and its quaternary subsets are investigated all in as‐cast state. Microstructure evolution, phase constituent, and tensile properties at room temperature are studied. The HEAs have multi‐phase FCC structures with slightly different lattice constants and spherical Cu‐rich particles are observed in most systems. All alloys exhibit dendrite‐like morphology with Cu segregation in interdendritic regions due to the solute partitioning. The investigated HEAs show good strengths, large elongations, and work hardening capability. The strengths are attributed to combined mechanisms, especially the precipitation strengthening by Cu‐rich particles. The findings provide some model HEA systems for further usefully guiding design in the widely compositional space of Cr‐free HEAs.

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Section: Resultsmentioning

confidence: 99%

Microstructure and Mechanical Properties of Face‐Centered‐Cubic‐Based Cr‐Free Equiatomic High‐Entropy Alloys

Liu

Zhang

et al. 2020

Adv Eng Mater

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“…[92] On the other hand, these models are usually suitable for predicting the strength of HEAs/MEAs in specific systems, and their generalization ability needs to be improved. For example, Wen et al [97] demonstrated that the yield stress predicted by the Varvenne model merely shows a sound tendency for Cr 6 (MnFeCoNi) 94 and Cu 6 (MnFeCoNi) 94 HEAs, whereas an opposite trend was observed for Al 6 (MnFeCoNi) 94 and Ti 6 (MnFeCoNi) 94 HEAs. In addition, the Senkov model has also been extended by Rao et al [98] from BCC to FCC HEA systems, indicating a limited predictive ability.…”

Section: Solid-solution Strengtheningmentioning

confidence: 99%

Strategies for Achieving Strength–Ductility Synergy in Face‐Centered Cubic High‐ and Medium‐Entropy Alloys

et al. 2023

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High‐ and medium‐entropy alloys (HEAs/MEAs), also called as multicomponent alloys, are a new class of materials that break through the traditional alloy design concept based on single principal element. However, they do not break away from the magic spell of strength–ductility trade‐off. Therefore, designing HEAs/MEAs with both high strength and high ductility still remains a great challenge nowadays. This article provides a review on the recent progress in mechanical properties of face‐centered cubic (FCC) HEAs/MEAs. First, several traditional strengthening strategies are briefly reviewed, focusing on the strengthening mechanisms and the optimized mechanical properties. Subsequently, various novel strategies for achieving strength–ductility synergy in HEAs/MEAs are summarized, which include lowering the stacking fault energy, regulating the short‐range order, promoting transformation‐induced plasticity, and constructing heterogeneous microstructures. The basic ideas and related underlying mechanisms from these strategies are discussed. Finally, the current challenges and the future outlooks are emphasized and addressed systematically. In brief, the present review is expected to provide a useful guide for the design of HEAs/MEAs with superior mechanical properties.

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Effect of Mo on Phase Stability and Properties in FeMnNiCo High-Entropy Alloys

Cichocki

Bała

Kozieł

et al. 2022

Metall Mater Trans A

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Structure and tensile properties of Mx(MnFeCoNi)100-x solid solution strengthened high entropy alloys

Cited by 10 publications

References 69 publications

Microstructure and Mechanical Properties of Face‐Centered‐Cubic‐Based Cr‐Free Equiatomic High‐Entropy Alloys

Microstructure and Mechanical Properties of Face‐Centered‐Cubic‐Based Cr‐Free Equiatomic High‐Entropy Alloys

Strategies for Achieving Strength–Ductility Synergy in Face‐Centered Cubic High‐ and Medium‐Entropy Alloys

Effect of Mo on Phase Stability and Properties in FeMnNiCo High-Entropy Alloys

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