Characterization of AlCoCrFeNi High Entropy Alloy Gas Atomized Powder

Bomfim, Pamela Karina dos Santos; Coury, Francisco Gil; Wang, Pei; Gargarella, Piter

doi:10.1590/1980-5373-mr-2021-0120

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…Additive Manufacturing (AM) is developing rapidly due to the increasing need to produce customized parts or parts with complex geometries in industries as diverse as medical, dental, aerospace, nuclear and automotive [1][2][3] . Laser Powder Bed Fusion (L-PBF) is an AM process used to manufacture metal components with complex geometries, which allows to reduce post-fabrication operations 2,4 . The main process parameters are laser power, scanning speed, scanning strategy (XY axes), and layer thickness (Z axis).…”

Section: Introductionmentioning

confidence: 99%

Effect of Hot Isostatic Pressing of Water Atomized AISI 316L Manufactured by Laser Powder Bed Fusion

et al. 2023

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The objective of this work is to study the possibility of obtaining dense parts using water atomized AISI 316L steel powder in the L-PBF process. Despite its irregular, non-spherical, particle morphology, it has a significantly lower cost. 25 samples were produced varying the laser power and the scanning speeds to determine the optimal processing conditions. Additionally, hot isostatic pressing (HIP) was performed after the L-PBF process to further increase densification. Selected samples were subjected to microstructural characterization. The best densification results obtained were for the sample produced with the laser power of 173 W and scanning speed of 600 mm/s, where densifications close to 98% were obtained. HIP post-processing promoted increased densification of samples with closed porosity, allowing samples with densification above 95% to reach values close to 100%. HIP did not promote the closure of open pores. The results indicate that the use of water atomized AISI 316L in the L-PBF process combined with post-processing by HIP can produce dense engineering components and at the same time reduce the production costs of the manufactured components, mainly because it is a lower cost raw material when compared to the commonly used feedstock obtained by gas atomization.

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Section: Introductionmentioning

confidence: 99%

Effect of Hot Isostatic Pressing of Water Atomized AISI 316L Manufactured by Laser Powder Bed Fusion

et al. 2023

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Metal powder as feedstock for laser-based additive manufacturing: From production to powder modification

Mathias,

Pinotti,

Batistão

et al. 2023

Journal of Materials Research

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Laser powder bed fusion (L-PBF) and direct laser deposition (DLD) are the two main processes currently used in the additive manufacturing (AM) of metals. For both methods, metal powders are used as feedstock, and they must present specific physical and chemical properties to ensure optimal processing and reliable and reproducible printing results. Particle morphology, size distribution, and flowability, among other factors, depend on the powder production process and directly influence the processing parameters and physical characteristics of the parts built by AM. This systematic review presents different concepts involving L-PBF and DLD manufacturing and the application of metal powders. The methods used to produce and characterize metal powders and the modification techniques to improve their processability by AM are detailed and discussed. Environmental and health risks are also presented, and safety measures that must be considered while handling metal powders. Some key topics requiring attention for further development are highlighted. Graphical abstract

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Characterization of AlCoCrFeNi High Entropy Alloy Gas Atomized Powder

Cited by 2 publications

References 23 publications

Effect of Hot Isostatic Pressing of Water Atomized AISI 316L Manufactured by Laser Powder Bed Fusion

Effect of Hot Isostatic Pressing of Water Atomized AISI 316L Manufactured by Laser Powder Bed Fusion

Metal powder as feedstock for laser-based additive manufacturing: From production to powder modification

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