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Study on Anomalous Rapid Solidification of Al-35 at%Ni in Microgravity

Reinartz, Marcus and Kolbe, Matthias and Herlach, D. and Rettenmayr, M. and Toropova, L.V. and Alexandrov, Dimitri and Galenko, P.K. (2022) Study on Anomalous Rapid Solidification of Al-35 at%Ni in Microgravity. JOM: Journal of the Minerals, Metals and Materials Society. Springer. doi: 10.1007/s11837-021-05098-8. ISSN 1047-4838.

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Official URL: https://www.springer.com/journal/11837


Experiments were carried out onboard the International Space Station using the electromagnetic levitation (EML) facility on dendritic growth in Al- 35 at%Ni under primary solidification of the NiAl(B2)-phase. The ‘‘velocity versus undercooling’’ relationship shows an anomalous behavior. At low undercoolings, DT < 250 K, the velocity unexpectedly decreases with increasing undercooling. For higher undercoolings, DT > 250 K, the crystal velocity increases with increasing undercooling following a thermodynamically consistent trend. For such anomalous behavior, a special mechanism was identified through the different crystals having scales and dendritic morphology. The scaled front consists of numerous nuclei ahead of the crystal–liquid interface that occurs in the undercooling range featuring the negative slope for the crystal growth velocity at DT < 250 K. This unusual behavior is confirmed experimentally and explained theoretically using analytical solutions for the crystal growth front with the polydisperse ensemble of crystals nucleating ahead of it.

Item URL in elib:https://elib.dlr.de/186046/
Document Type:Article
Title:Study on Anomalous Rapid Solidification of Al-35 at%Ni in Microgravity
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Herlach, D.Institut für Materialphysik im Weltraum, DLRUNSPECIFIEDUNSPECIFIED
Rettenmayr, M.Friedrich-Schiller-Universität JenaUNSPECIFIEDUNSPECIFIED
Toropova, L.V.Laboratory of Multi-Scale Mathematical Modeling, EkaterinburgUNSPECIFIEDUNSPECIFIED
Alexandrov, DimitriUral State University, Ekaterinenburg, RUSUNSPECIFIEDUNSPECIFIED
Galenko, P.K.Friedrich-Schiller Universität JenaUNSPECIFIEDUNSPECIFIED
Date:12 January 2022
Journal or Publication Title:JOM: Journal of the Minerals, Metals and Materials Society
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
EditorsEmailEditor's ORCID iDORCID Put Code
The Minerals, Metals & Materials Society, CompanyUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Keywords:ISS, solidification, Al-Ni, dendrite
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
Deposited By: Kolbe, Matthias
Deposited On:11 Apr 2022 08:09
Last Modified:20 Oct 2023 07:24

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