Bulk nanostructured AlCoCrFeMnNi chemically complex alloy synthesized by laser-powder bed fusion

Jung, Hyo Yun; Peter, Nicolas J.; Gärtner, Eric; Dehm, Gerhard; Uhlenwinkel, Volker; Jägle, Eric Aimé

doi:10.1016/j.addma.2020.101337

Cited by 9 publications

(3 citation statements)

References 48 publications

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“…This innovative method offers precise control over material composition and microstructure, making it ideal for fabricating complex geometries with superior mechanical properties. A bulk nanostructured equimolar AℓCoCrFeMnNi system was fabricated using the SLM technique and consisted of Aℓ & Ni-rich ordered and Cr & Fe-rich disordered BCC phases [ 135 ]. The high-energy laser beam of the SLM process caused Mn inhomogeneity due to partial evaporation, and due to rapid cooling rates, the formation of coarse columnar grains elongated in the built direction was observed.…”

Section: Additive Manufacturing Of Heasmentioning

confidence: 99%

Additively manufactured high-entropy alloys for hydrogen storage: Predictions

Xaba

2024

Heliyon

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Section: Additive Manufacturing Of Heasmentioning

confidence: 99%

Additively manufactured high-entropy alloys for hydrogen storage: Predictions

Xaba

2024

Heliyon

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“…Jung et al [ 136 ] fabricated an AlCrFeCoMnNi HEA using the laser powder bed fusion (LPBF) process. Again, the microstructure revealed B2 (Ni-Al-rich) and BCC (Fe-Cr-rich) solid solutions.…”

Section: Microstructural Evolution Of Heas Fabricated By Additive Manufacturing (Am)mentioning

confidence: 99%

Synthesis Route, Microstructural Evolution, and Mechanical Property Relationship of High-Entropy Alloys (HEAs): A Review

et al. 2021

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Microstructural phase evolution during melting and casting depends on the rate of cooling, the collective mobility of constituent elements, and binary constituent pairs. Parameters used in mechanical alloying and spark plasma sintering, the initial structure of binary alloy pairs, are some of the factors that influence phase evolution in powder-metallurgy-produced HEAs. Factors such as powder flowability, laser power, powder thickness and shape, scan spacing, and volumetric energy density (VED) all play important roles in determining the resulting microstructure in additive manufacturing technology. Large lattice distortion could hinder dislocation motion in HEAs, and this could influence the microstructure, especially at high temperatures, leading to improved mechanical properties in some HEAs. Mechanical properties of some HEAs can be influenced through solid solution hardening, precipitation hardening, grain boundary strengthening, and dislocation hardening. Despite the HEA system showing reliable potential engineering properties if commercialized, there is a need to examine the effects that processing routes have on the microstructure in relation to mechanical properties. This review discusses these effects as well as other factors involved.

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“…Their results revealed promising mechanical properties comparable to conventional stainless steels, benefiting from the refinement of microstructure through the LPBF process. Some studies have investigated the printability of various AlCoCrFeNi based HEAs, including Al x CoCrFeNi [ 18 , 19 ], AlCoCrCuFeNi [ 20 ], AlCoCrFeMnNi [ 21 ], and AlCoCrFeNiTi 0.5 [ 22 ]. These studies have shown that LPBF produces hierarchical microstructures, including cellular structure, modulation, and dislocation cells, which are beneficial to the advancement of mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Properties of Additively Manufactured AlCoCr0.75Cu0.5FeNi Multicomponent Alloy: Controlling Magnetic Properties by Laser Powder Bed Fusion via Spinodal Decomposition

et al. 2022

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A non-equiatomic AlCoCr0.75Cu0.5FeNi alloy has been identified as a potential high strength alloy, whose microstructure and consequently properties can be widely varied. In this research, the phase structure, hardness, and magnetic properties of AlCoCr0.75Cu0.5FeNi alloy fabricated by laser powder bed fusion (LPBF) are investigated. The results demonstrate that laser power, scanning speed, and volumetric energy density (VED) contribute to different aspects in the formation of microstructure thus introducing alterations in the properties. Despite the different input parameters studied, all the as-built specimens exhibit the body-centered cubic (BCC) phase structure, with the homogeneous elemental distribution at the micron scale. A microhardness of up to 604.6 ± 6.8 HV0.05 is achieved owing to the rapidly solidified microstructure. Soft magnetic behavior is determined in all as-printed samples. The saturation magnetization (Ms) is dependent on the degree of spinodal decomposition, i.e., the higher degree of decomposition into A2 and B2 structure results in a larger Ms. The results introduce the possibility to control the degree of spinodal decomposition and thus the degree of magnetization by altering the input parameters of the LPBF process. The disclosed application potentiality of LPBF could benefit the development of new functional materials.

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Bulk nanostructured AlCoCrFeMnNi chemically complex alloy synthesized by laser-powder bed fusion

Cited by 9 publications

References 48 publications

Additively manufactured high-entropy alloys for hydrogen storage: Predictions

Additively manufactured high-entropy alloys for hydrogen storage: Predictions

Synthesis Route, Microstructural Evolution, and Mechanical Property Relationship of High-Entropy Alloys (HEAs): A Review

Microstructure and Properties of Additively Manufactured AlCoCr0.75Cu0.5FeNi Multicomponent Alloy: Controlling Magnetic Properties by Laser Powder Bed Fusion via Spinodal Decomposition

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