Mechanically alloyed (FeCoNi)75Cu25−xSix high entropy alloys: Phase evaluation and magnetic properties

Javdan, M.; Gheisari, Kh.; Reihanian, M.

doi:10.1016/j.jallcom.2023.170030

Journal of Alloys and Compounds

2023

DOI: 10.1016/j.jallcom.2023.170030

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Mechanically alloyed (FeCoNi)75Cu25−xSix high entropy alloys: Phase evaluation and magnetic properties

M. Javdan

Kh. Gheisari

M. Reihanian

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2024

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Cited by 16 publications

References 68 publications

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Phase Composition, Microstructure, and Mechanical Properties of Spark Plasma Sintered AlCrFeNiX (X = Co, Cu, and CoCu) High Entropy Alloys

Li,

Luo,

Wang

et al. 2024

Adv Eng Mater

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Phase composition, microstructure, and mechanical properties of spark plasma sintered (SPSed) AlCrFeNiX (X = Co, Cu, and CoCu) high entropy alloys (HEAs) were investigated. The results show that gas‐atomized AlCrFeNiCo and AlCrFeNiCu HEAs exhibit the single body‐centered cubic (BCC) phase, while a dual‐phase (face‐centered cubic (FCC) + BCC) structure is observed in AlCrFeNiCoCu HEA. After spark plasma sintering, an FCC phase with different lattice parameters can be observed in all three HEAs except for the BCC phase. FCC1 phase enriched in Fe‐Cr and FCC2 phase enriched in Cu appear in SPSed AlCrFeNiCo and AlCrFeNiCu HEAs, respectively, while both FCC1 and FCC2 phases are precipitated in SPSed AlCrFeNiCoCu HEA. The SPSed AlCrFeNiCoCu HEA has the largest fraction of the FCC phase (33%), while the lowest fraction of the FCC phase (12%) is observed in the SPSed AlCrFeNiCu HEA. Furthermore, the brittle and hard σ phase is also precipitated in SPSed AlCrFeNiCo HEA. The SPSed AlCrFeNiCo HEA possesses the highest hardness of 465 HV and compressive yield strength of 1175 MPa, which is attributed to the high volume fraction of BCC phase and σ phase, while the SPSed AlCrFeNiCoCu HEA shows the lowest hardness of 363 HV and compressive yield strength of 1024 MPa due to the highest volume fraction of FCC phase.

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Phase Composition, Microstructure, and Mechanical Properties of Spark Plasma Sintered AlCrFeNiX (X = Co, Cu, and CoCu) High Entropy Alloys

Li,

Luo,

Wang

et al. 2024

Adv Eng Mater

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Investigating the Effects of Boron Nitride on Mechanical Properties of CoCrFeNiMn Composites

Kumar,

Suresh,

Barmavatu

2024

steel research int.

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High‐entropy alloys (HEAs) are gaining attention for their exceptional properties but achieving precision and surface quality in powder metallurgy (PM) can be challenging. This study investigates the mechanical properties of CoCrFeNiMn HEAs produced through the flake powder metallurgy (FPM) technique and laser powder bed fusion (LPBF) preservative industrial, which established outstanding antiwear properties. To assess the enhancement of mechanical behavior and wear resistance by incorporating boron nitride (BN) into CoCrFeNiMn composites is fabricated via FPM. By incorporating BN into the composites, the mechanical behavior is significantly enhanced, leading to improved resistance against wear. Furthermore, the study delivers comprehensions into the serration behavior microstructure and shear localization in a high‐strain‐rate‐deformed CoCrFeMnNi entropy‐high alloy produces through metallurgy in powder. The serration behavior of the CoCrFeMnNi HEA is discussed concerning strain rate and temperature. Accordingly, the study employs the LPBF technique to fabricate the CoCrFeMnNi alloy from the prepared flakes. Microstructural characterization using scanning electron microscopy and X‐ray diffraction techniques to explore phase distribution, grain size, and possible segregation in the CoCrFeMnNi alloy produced through FPM‐LPBF is performed. In this particular investigation, a gradient microstructure is achieved through fusion in a laser‐powder bed of CoCrFeMnNi HEA onto highly deformed equal‐atomic HEA sheets. The resulting combination of partially recrystallized regions, exhibiting elevated yield strength, and fully recrystallized regions, demonstrates enhanced strain hardenability and elongation, and yields superior mechanical properties. The results obtained from the FPM‐LPBF CoCrFeMnNi alloy will be compared with those of conventionally processed CoCrFeMnNi to highlight the advantages and improvements achieved through the proposed method. The study findings reveal that the fundamental understanding of HEAs’ behavior under LPBF with FPM affords valuable insights into optimizing the processing parameters and achieving superior mechanical attributes.

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Investigating electrical and magnetic properties of spark plasma sintered (FeCoNi)75Cu25−xSix high entropy alloys

Javdan,

Gheisari,

Reihanian

2024

J Mater Sci: Mater Electron

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Mechanically alloyed (FeCoNi)75Cu25−xSix high entropy alloys: Phase evaluation and magnetic properties

Cited by 16 publications

References 68 publications

Phase Composition, Microstructure, and Mechanical Properties of Spark Plasma Sintered AlCrFeNiX (X = Co, Cu, and CoCu) High Entropy Alloys

Phase Composition, Microstructure, and Mechanical Properties of Spark Plasma Sintered AlCrFeNiX (X = Co, Cu, and CoCu) High Entropy Alloys

Investigating the Effects of Boron Nitride on Mechanical Properties of CoCrFeNiMn Composites

Investigating electrical and magnetic properties of spark plasma sintered (FeCoNi)75Cu25−xSix high entropy alloys

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