Phase transformations in commercial cold-rolled Al–Zn–Mg–Cu alloys with Sc and Zr addition
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F21%3A00548488" target="_blank" >RIV/61389021:_____/21:00548488 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/21:10420417
Result on the web
<a href="https://link.springer.com/article/10.1007%2Fs10973-020-09862-x" target="_blank" >https://link.springer.com/article/10.1007%2Fs10973-020-09862-x</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10973-020-09862-x" target="_blank" >10.1007/s10973-020-09862-x</a>
Alternative languages
Result language
angličtina
Original language name
Phase transformations in commercial cold-rolled Al–Zn–Mg–Cu alloys with Sc and Zr addition
Original language description
The influence of cold rolling on thermal and mechanical properties together with microstructure observation of cast AlZnMgCu(ScZr) alloys has been investigated. Differential scanning calorimetry measurements and microhardness were compared to microstructure that was observed by microscopy (scanning electron and transmission), electron backscatter and X-ray diffractions. Microstructure observation of all studied alloys proved eutectic phase at (sub)grain boundaries. The eutectic phase at grain boundary in the AlZnMgCuScZr has a disordered quasicrystalline structure (known as the T phase or Mg32(Al,Cu,Zn)49). In the AlZnMgCu alloy, the eutectic phase consists of two phases—predominant MgZn2 phase and minor quasicrystalline T phase. During casting and subsequent cooling, multilayer primary Al3(Sc,Zr) particles also precipitated in the alloy with Sc,Zr addition. Solute clusters and/or Guinier–Preston zones were dissolved during the annealing up to ~ 170 °C in the alloys. The highest hardening is caused by particle formation of metastable η′ and stable η phase in AlZnMgCu system observed at ~ 200 °C. Precipitation of the secondary Al3(Sc,Zr) particles is probably the reason of hardening after annealing above 300 °C in the Sc,Zr-containing alloys. Melting of eutectic phases was observed in DSC curves at temperatures ~ 481 and ~ 493 °C in the studied alloys. Activation energies of the Guinier–Preston zones dissolution and/or solute clusters were calculated using Kissinger and Starink method as QA ≈ 100 kJ mol−1 and the formation of the particles of Al–Zn–Mg–Cu system as QB ≈ 150 kJ mol−1. No significant effect on the calculation of activation energy values of thermal processes was observed in deformed alloys. Sc,Zr addition in the alloys stabilizes grains, and there is no recrystallization in the AlZnMgCuScZr alloy at temperature 450 °C/10 h.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Thermal Analysis and Calorimetry
ISSN
1388-6150
e-ISSN
1588-2926
Volume of the periodical
145
Issue of the periodical within the volume
6
Country of publishing house
HU - HUNGARY
Number of pages
12
Pages from-to
2991-3002
UT code for WoS article
000537978100006
EID of the result in the Scopus database
2-s2.0-85086043843