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Relating cooling rates in superheated liquid during solidification for powder characterization

Muusha, P. and Stanford, B. and Kolbe, Matthias and Matson, D. M. (2023) Relating cooling rates in superheated liquid during solidification for powder characterization. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science. Springer. doi: 10.1007/s11661-023-07135-4. ISSN 1073-5623.

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Official URL: https://link.springer.com/article/10.1007/s11661-023-07135-4


When doing mathematical modelling to predict microstructural evolution during spray forming processes, it is important to know how fast cooling occurs during solidification. Radiative, convective, and conductive heat losses are always present, and it is relatively straightforward to define cooling in the liquid phase. However, once solid begins to form it is difficult to evaluate the mushy-zone cooling rates because both sensible and latent heat are removed simultaneously. Since mushy-zone cooling drives microstructural evolution it is important to be able to relate liquid and solid cooling processes. A model is developed relating these two cooling rates as a function of melt thermophysical properties and includes the ability to predict how radiative transport is influenced by any phase-change induced variation in surface emissivity or specific heat. It is validated using containerless processing techniques developed for use during space testing using the ESA ISS-EML facility. The motivation of this paper is to critically evaluate the contradictory thermophysical property lists currently available in the literature and bridge the gap between cooling rates observed in the liquid and rates which subsequently develop during mushy-zone solidification.

Item URL in elib:https://elib.dlr.de/196475/
Document Type:Article
Title:Relating cooling rates in superheated liquid during solidification for powder characterization
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Muusha, P.Tufts University, Medfort, MA, USAUNSPECIFIEDUNSPECIFIED
Stanford, B.Tufts University, Medfort, MA, USAUNSPECIFIEDUNSPECIFIED
Matson, D. M.Tufts University, Medfort, MA, USAUNSPECIFIEDUNSPECIFIED
Date:25 July 2023
Journal or Publication Title:Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
EditorsEmailEditor's ORCID iDORCID Put Code
TMS, xxThe Minerals, Metals and Materials SocietyUNSPECIFIEDUNSPECIFIED
Keywords:ISS-EML, cooling rates, emissivity, thermophysical properties
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Materials Research and Microgravity (MuM)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Scientific Experiments MP
Deposited By: Kolbe, Matthias
Deposited On:14 Aug 2023 06:28
Last Modified:19 Oct 2023 16:01

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