High-strength AlCoCrFeNi2.1 eutectic high entropy alloy with ultrafine lamella structure via additive manufacturing

Chen, Xinsheng; Kong, Jian; Li, Jianliang; Feng, Shuai; Li, Hang; Wang, Qipeng; Liang, Yuzheng; Dong, Kewei; Yang, Yang

doi:10.1016/j.msea.2022.143816

Cited by 32 publications

(8 citation statements)

References 68 publications

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“…This model suggests that λ can be reduced by employing appropriate fabrication methods that increase Δ T . For instance, in the case of the AlCoCrFeNi 2.1 EHEA, conventional casting methods have yielded lamellar structures with spacings in the range of several micrometers. , However, AM techniques have been utilized to produce the alloy with nano lamellar structures, resulting in optimized mechanical properties. ,, Additionally, John et al employed mechanical alloying and spark plasma sintering to prepare the AlCoCrFeNi 2.1 EHEA with nanocrystalline grains . Furthermore, Zhang et al successfully developed a FeCoNiNb 0.5 EHEA thin film with a nanograined structure using magnetron sputtering .…”

Section: Bulk Nanostructured Heasmentioning

confidence: 99%

Nanostructured High Entropy Alloys as Structural and Functional Materials

Zhu,

Gao,

Yao

et al. 2024

ACS Nano

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Since their introduction in 2004, high entropy alloys (HEAs) have attracted significant attention due to their exceptional mechanical and functional properties. Advances in our understanding of atomic-scale ordering and phase formation in HEAs have facilitated the development of fabrication techniques for synthesizing nanostructured HEAs. These materials hold immense potential for applications in various fields including automobile industries, aerospace engineering, microelectronics, and clean energy, where they serve as either structural or functional materials. In this comprehensive Review, we conduct an in-depth analysis of the mechanical and functional properties of nanostructured HEAs, with a particular emphasis on the roles of different nanostructures in modulating these properties. To begin, we explore the intrinsic and extrinsic factors that influence the formation and stability of nanostructures in HEAs. Subsequently, we delve into an examination of the mechanical and electrocatalytic properties exhibited by bulk or three-dimensional (3D) nanostructured HEAs, as well as nanosized HEAs in the form of zero-dimensional (0D) nanoparticles, one-dimensional (1D) nanowires, or two-dimensional (2D) nanosheets. Finally, we present an outlook on the current research landscape, highlighting the challenges and opportunities associated with nanostructure design and the understanding of structure−property relationships in nanostructured HEAs.

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Section: Bulk Nanostructured Heasmentioning

confidence: 99%

Nanostructured High Entropy Alloys as Structural and Functional Materials

Zhu,

Gao,

Yao

et al. 2024

ACS Nano

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“…These thermal cycle-induced microstructural changes (precipitated AlNi-rich B2 particles) were reported to have weakened the solid-solution strengthening attribute of the FCC phase, which eventually reduced the yield strength and the hardness performance of the AlCoCrFeNi high entropy alloy [133]. The rapid cooling rate of the L-PBF-processed AlCoCrFeNi 2.1 alloy aided the formation of nano-lamella structure (eutectic) [146]. Similarly, the disparity in the microstructure and mechanical properties across the built height (bottom, middle and upper regions) of the AlCoCrFeNi high entropy alloy was studied by Yao et al [147] to further understand the thermal cycle effect on the HEA.…”

Section: Post-processing Treatments Of High Entropy Alloys (Heas)mentioning

confidence: 99%

Post-processing treatments–microstructure–performance interrelationship of metal additive manufactured aerospace alloys: A review

Ojo

Taban

2023

Materials Science and Technology

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The application of Metal Additive Manufacturing (MAM) in the aerospace industry has been gaining attention. The poor surface quality of parts greatly limits the prospects of MAM-produced parts in the aerospace industry as fatigue performance hinges on a good surface finish and homogeneous microstructure. Post-processing treatments are important to improve the surface quality and the overall performance of MAM-produced parts during static and dynamic loadings. This paper provides a review of the current state of post-processing treatment options for MAM-produced parts. The advances in the post-processing treatments of MAM parts to improve fatigue strength, tensile strength, surface integrity and other properties of parts are reviewed. Future research prospects on metal additive manufacturing of aerospace parts are briefly expounded. Abbreviations: AM: Additive Manufacturing; CMT-WAAM: Cold Metal Transfer-Based Wire Arc Additive Manufacturing; CSD: Cold Spray Deposition; DA: Direct Aging; DED: Directed Energy Deposition; E: Elongation; EBAM: Wire-feed Electron Beam Additive Manufacturing; EBAM Electron Beam Additive Manufacturing; EBSD: Electron Back Scattered Diffraction; FRAM: Friction Rolling Additive Manufacturing; FSAM: Friction Stir Additive Manufacturing; FSP: Friction Stir Processing; HFDB: Hybrid Friction Diffusion Bonding; HIP: Hot Isostatic Pressing; HSA Homogenisation + Solution Treatment + Aging; IFSP: Interlayer Friction Stir Processing; IPF: Inverse Pole Figure; KAM: Kernel Average Misorientation; LAM: Laser Additive Manufacturing Process; LENS: Laser Engineered Net Shaping; LDM: Laser Deposition Manufacturing; L-PBF: Laser Powder Bed Fusion; MAM: Metal Additive Manufacturing; MTFS: Multi-track Multi-layer Friction Surfacing; O-WLAM: Wire Oscillating Laser Additive Manufacturing (O-WLAM); S: Solution Treatment; SA: Solution Treatment + aging; TEM: Transmission Electron Microscope; UAM: Ultrasonic Additive Manufacturing; UTS: Ultimate Tensile Strength; WAAM: Wire Arc Additive Manufacturing; YS: Yield Strength

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“…Current advancements in optimizing laser process parameters have enabled the printing of nearly fully dense HEAs, with room-temperature mechanical properties significantly surpassing those of cast alloys [27,28]. Further research indicates that the high-temperature gradients and cooling rates during the laser deposition process are conducive to the formation of alloys with excellent microstructural morphology, significantly enhancing the interphase strengthening effect and verifying the feasibility of tailoring the mechanical properties of HEAs [29,30].…”

Section: Introductionmentioning

confidence: 98%

Microstructure, Hardness, Wear Resistance, and Corrosion Resistance of As-Cast and Laser-Deposited FeCoNiCrAl0.8Cu0.5Si0.5 High Entropy Alloy

Ji,

Zhou,

2024

Coatings

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FeCoNiCrAl0.8Cu0.5Si0.5 high-entropy alloys were fabricated using vacuum induction melting and laser deposition processes, followed by a comparison of the structural and mechanical properties of two distinct sample types. The as-cast FeCoNiCrAl0.8Cu0.5Si0.5 alloy is comprised of BCC1, BCC2, and Cr3Si phases, while the laser-deposited alloy primarily features BCC1 and BCC2 phases. Microstructural analysis revealed that the as-cast alloy exhibits a dendritic morphology with secondary dendritic arms and densely packed grains, and the laser-deposited alloy displays a dendritic structure without the formation of granular interdendritic regions. For mechanical properties, the as-cast FeCoNiCrAl0.8Cu0.5Si0.5 alloy demonstrated higher hardness than the as-deposited alloy, with values of 586 HV0.2 and 557 HV0.2, respectively. The wear rate for the as-cast alloy was observed at 3.5 × 10−7 mm3/Nm, with abrasive wear being the primary wear mechanism. Conversely, the as-deposited alloy had a wear rate of 9.0 × 10−7 mm3/Nm, characterized by adhesive wear. The cast alloy exhibited an icorr of 4.062 μA·cm−2, with pitting as the form of corrosion. The laser-deposited alloy showed an icorr of 3.621 μA·cm−2, with both pitting and intergranular corrosion observed. The laser-deposited alloy demonstrated improved corrosion resistance. The investigation of their microstructure and mechanical properties demonstrates the application potential of FeCoNiCrAl0.8Cu0.5Si0.5 alloys in scenarios requiring high hardness and enhanced wear resistance.

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High-strength AlCoCrFeNi2.1 eutectic high entropy alloy with ultrafine lamella structure via additive manufacturing

Cited by 32 publications

References 68 publications

Nanostructured High Entropy Alloys as Structural and Functional Materials

Nanostructured High Entropy Alloys as Structural and Functional Materials

Post-processing treatments–microstructure–performance interrelationship of metal additive manufactured aerospace alloys: A review

Microstructure, Hardness, Wear Resistance, and Corrosion Resistance of As-Cast and Laser-Deposited FeCoNiCrAl0.8Cu0.5Si0.5 High Entropy Alloy

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