Phase composition and morphology development in WE-type alloys modified by high Zn content
Result description
Quasicrystalline icosahedral equilibrium phase was found in Mg-Y-Nd (WE43) alloys with the addition of 12 wt.% and 25 wt.% Zn constituting grain boundary eutectic phases. In response to the isochronal annealing morphologically similar precipitates of thephases with the same structure as those developing during heat treatment of binary Mg-8wt.%Zn alloy at temperatures higher than 150°C were observed, namely ?1' (b-centered monoclinic crystal structure a=2.596 nm, b=1.428 nm, c=0.524 nm, ?=102.5°) and ?2' (hexagonal MgZn2). Development of the resistivity and microhardness during isochronal annealing corresponds to the phase transformations and morphology changes of the phases observed. Dislocations with the c Burgers vector component generated due to the presence of icosahedral phase are responsible for the improved formability as compared to the WE43 alloy.
Keywords
Magnesium alloysicosahedral phasemicrostructurerare earthzinc
The result's identifiers
Result code in IS VaVaI
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Phase composition and morphology development in WE-type alloys modified by high Zn content
Original language description
Quasicrystalline icosahedral equilibrium phase was found in Mg-Y-Nd (WE43) alloys with the addition of 12 wt.% and 25 wt.% Zn constituting grain boundary eutectic phases. In response to the isochronal annealing morphologically similar precipitates of thephases with the same structure as those developing during heat treatment of binary Mg-8wt.%Zn alloy at temperatures higher than 150°C were observed, namely ?1' (b-centered monoclinic crystal structure a=2.596 nm, b=1.428 nm, c=0.524 nm, ?=102.5°) and ?2' (hexagonal MgZn2). Development of the resistivity and microhardness during isochronal annealing corresponds to the phase transformations and morphology changes of the phases observed. Dislocations with the c Burgers vector component generated due to the presence of icosahedral phase are responsible for the improved formability as compared to the WE43 alloy.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JG - Metallurgy, metal materials
OECD FORD branch
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Result continuities
Project
GA106/06/0252: Influence of minority solutes on plasticity of Mg-rare earth-base alloys
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Materials Research
ISSN
1862-5282
e-ISSN
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Volume of the periodical
100
Issue of the periodical within the volume
3
Country of publishing house
DE - GERMANY
Number of pages
4
Pages from-to
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UT code for WoS article
000264870600005
EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
JG - Metallurgy, metal materials
Year of implementation
2009