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Formation of an 18R long-period stacking ordered structure in rapidly solidified Mg88Y8Zn4 alloy

Garcés, Gerardo and Requena, Guillermo and Tolnai, Domonkos and Pérez, Pablo and Medina, Judit and Stark, Andreas and Schell, Norbert and Adeva, Paloma (2016) Formation of an 18R long-period stacking ordered structure in rapidly solidified Mg88Y8Zn4 alloy. Materials Characterization, 118, pp. 514-518. Elsevier. DOI: 10.1016/j.matchar.2016.06.032 ISSN 1044-5803

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Abstract

The formation of the long-period stacking ordered structure (LPSO) in a Mg88Y8Zn4(at%) ribbon produced by melt spinning was studied using high energy X-ray synchrotron radiation diffraction during in-situ isochronal heating and transmission electron microscopy. The microstructure of the rapidly solidified ribbons is characterised by fine magnesiumgrains with yttriumand zinc in solid solution and primary 18R LPSO-phase segregated at grain boundaries. Using differential scanning calorimetry, a strong exothermal peak was observed around 300 °Cwhich was associated with the development of the 18R-type LPSO-phase in themagnesiumgrains. The apparent activation energy calculated using the Kissinger model was 125 KJmol−1 and it is related to simultaneous diffusion of Y and Zn through magnesium basal plane.

Item URL in elib:https://elib.dlr.de/108450/
Document Type:Article
Title:Formation of an 18R long-period stacking ordered structure in rapidly solidified Mg88Y8Zn4 alloy
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Garcés, GerardoUNSPECIFIEDUNSPECIFIED
Requena, GuillermoGuillermo.Requena (at) dlr.deUNSPECIFIED
Tolnai, DomonkosUNSPECIFIEDUNSPECIFIED
Pérez, PabloUNSPECIFIEDUNSPECIFIED
Medina, JuditUNSPECIFIEDUNSPECIFIED
Stark, AndreasUNSPECIFIEDUNSPECIFIED
Schell, NorbertUNSPECIFIEDUNSPECIFIED
Adeva, PalomaUNSPECIFIEDUNSPECIFIED
Date:2016
Journal or Publication Title:Materials Characterization
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:118
DOI :10.1016/j.matchar.2016.06.032
Page Range:pp. 514-518
Publisher:Elsevier
ISSN:1044-5803
Status:Published
Keywords:Magnesium alloys Long-period stacking ordered structure, In-situ synchrotron radiation diffraction Transmission electron microscopy
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Metallic Structures and Hybrid Material Systems
Deposited By: Requena, Guillermo
Deposited On:29 Nov 2016 14:51
Last Modified:06 Sep 2019 15:18

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