Tracking Evaporation During Levitation Processing of Nickel-Based Superalloys on the ISS

Nawer, Jannatun; Gossé, Stéphane; Matson, Douglas M.

doi:10.1007/s11837-020-04256-8

Cited by 10 publications

(5 citation statements)

References 10 publications

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“…Dynamic sample mass was estimated after considering mass loss due to evaporation using Langmuir's equation (Nawer et al 2020b). Density of the liquid sample was then measured from the dynamic mass (m) and apparent volume (V).…”

Section: Discussionmentioning

confidence: 99%

Uncertainty Quantification of Thermophysical Property Measurement in Space and on Earth: A Study of Liquid Platinum Using Electrostatic Levitation

Nawer,

Ishikawa,

Oda

et al. 2023

J. Astron. Space Sci.

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A study of uncertainty analysis was conducted on four key thermophysical properties of molten Platinum using a non-contacting levitation technique. More specifically, this work demonstrates a detailed reporting of the uncertainties associated with the density, volumetric thermal expansion coefficient, surface tension and viscosity measurements at higher temperatures for a widely used refractory metal, Platinum using electrostatic levitation (ESL). The microgravity experiments were conducted using JAXA’s Electrostatic Levitation Furnace (ELF) facility on the International Space Station and the terrestrial experiments were conducted using NASA’s Marshal Space Flight Center’s ESL facility. The performance of these two facilities were then quantified based on the measurement precision and accuracy using the metrological International Standards Organization’s Guide to the Expression of Uncertainty Measurement (GUM) principles.

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Section: Discussionmentioning

confidence: 99%

Uncertainty Quantification of Thermophysical Property Measurement in Space and on Earth: A Study of Liquid Platinum Using Electrostatic Levitation

Nawer,

Ishikawa,

Oda

et al. 2023

J. Astron. Space Sci.

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“…3a , magnetohydrodynamic modeling is used to evaluate stirring and melt shear as a function of experimental conditions and control convection to desired levels 84 – 87 . Differential evaporation from complex industrial alloys can also be monitored over the test duration to set experimental conditions to minimize the potential for unwanted compositional shifts for volatile components in the melt 88 . These models require an understanding of the melt thermophysical properties—a subject of a sister article as part of this ESA review series.…”

Section: Outlook and Summarymentioning

confidence: 99%

Electromagnetic levitation containerless processing of metallic materials in microgravity: rapid solidification

et al. 2023

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Space levitation processing allows researchers to conduct benchmark tests in an effort to understand the physical phenomena involved in rapid solidification processing, including alloy thermodynamics, nucleation and growth, heat and mass transfer, solid/liquid interface dynamics, macro- and microstructural evolution, and defect formation. Supported by ground-based investigations, a major thrust is to develop and refine robust computational tools based on theoretical and applied approaches. This work is accomplished in conjunction with experiments designed for precise model validation with application to a broad range of industrial processes.

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“…In previous investigations, LangmuirÕs theory (Ref 30) was used to evaluate the evaporation of a molten metal droplet using electrostatic levitation (Ref 31) and electromagnetic levitation Fig. 8 Overview of the different planes Z and XY for cross sections in microgravity (Ref 32,33). For an individual substance i in the liquid mixture, its evaporation rate dm i =dt (kg AE s À1 ) can be predicted using LangmuirÕs equation,…”

Section: Evaporation Analysismentioning

confidence: 99%

Influence of Surface Tension and Evaporation on Melt Dynamics of Aluminum Alloys for Laser Powder Bed Fusion

Bärtl

Xiao

Brillo

et al. 2022

J. of Materi Eng and Perform

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One of the most important factors during Laser Powder Bed Fusion is a robust and stable process to generate reproducibly dense and crack-free components with the same homogenous and fine-grained microstructure. Among other factors, surface tension influences the robustness of this process. Three aluminum alloys were investigated by means of 3D laser printing with respect to their ability to form lightweight and high-performance structures. The alloys include two Al-Cr based alloys (Zicromal®: Al-Cr-Zr-Mn, Scancromal®: Al-Cr-Sc-Zr) and an Al-Mg based alloy (Scalmalloy®: Al-Mg-Sc-Mn-Zr). The surface tensions of their liquid melts were measured by means of the oscillating droplet method in electromagnetic levitation. Scalmalloy® exhibited a surface tension that was by 3-8% smaller than the other two alloys, over a temperature range of 500 K above their liquidus temperature; the evaporation analysis showed that Scancromal® exhibits significantly less evaporation compared to the other two alloys by an order of magnitude. During the Laser Powder Bed Fusion process, Scalmalloy® presented the most unstable melt dynamics, and Scancromal® appeared to be more robust and stable with less weld spatters and negligible dust deposition, as evidence from the high-speed video observations. The results support the idea that surface tension and evaporation are potentially crucial factors influencing the melt dynamics and also demonstrate the capability of additive manufacturing that produces customized aluminum alloys for aerospace applications.

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Tracking Evaporation During Levitation Processing of Nickel-Based Superalloys on the ISS

Cited by 10 publications

References 10 publications

Uncertainty Quantification of Thermophysical Property Measurement in Space and on Earth: A Study of Liquid Platinum Using Electrostatic Levitation

Uncertainty Quantification of Thermophysical Property Measurement in Space and on Earth: A Study of Liquid Platinum Using Electrostatic Levitation

Electromagnetic levitation containerless processing of metallic materials in microgravity: rapid solidification

Influence of Surface Tension and Evaporation on Melt Dynamics of Aluminum Alloys for Laser Powder Bed Fusion

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