Effect of Cold Rolling on Precipitation Processes in Al-Zn-Mg(-Sc-Zr) Alloy
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F18%3A00325887" target="_blank" >RIV/68407700:21220/18:00325887 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/18:10388137
Result on the web
<a href="http://dx.doi.org/10.12693/APhysPolA.134.631" target="_blank" >http://dx.doi.org/10.12693/APhysPolA.134.631</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.12693/APhysPolA.134.631" target="_blank" >10.12693/APhysPolA.134.631</a>
Alternative languages
Result language
angličtina
Original language name
Effect of Cold Rolling on Precipitation Processes in Al-Zn-Mg(-Sc-Zr) Alloy
Original language description
The effect of cold rolling (6% and 21%) on electrical, mechanical and thermal properties and microstructure of the classical mould-cast Al–Zn–Mg alloy with and without Sc,Zr-addition were studied. Samples were isochronally annealed up to 460 °C. Electrical resistivity and microhardness together with differential scanning calorimetry measurements were compared to microstructure development. The initial microhardness values of the alloys reflect the deformation degree. Distinct changes in electrical resistivity as well as in heat flow of the alloys studied are mainly caused by dissolution of Zn,Mg-rich Guinier–Preston zones and subsequent precipitation of the metastable 0 phase. Precipitation of this phase is responsible for a slight hardening effect. Probably an easier diffusion of Zn and Mg atoms along dislocations in the cold-rolled alloys is responsible for the dissolution of the Guinier–Preston zones and precipitation of the Zn,Mg-containing particles at the relatively lower temperatures in comparison to classical mould-cast alloys. Microstructure observation proved that the Sc,Zr-content is mainly concentrated in randomlylocalized regions in the Al matrix and together with Zn and Mg in the particles at grain boundaries. The hardening effect after annealing above 280 °C was observed in the AlZnMgScZr alloy. Microhardness decrease at temperatures above 350 °C in the alloys without Sc and Zr is probably connected with faster recovery processes. Cold rolling has no significant effect on the apparent activation energy values of the Guinier–Preston zones dissolution and formation of the Zn,Mg-containing particles.
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
<a href="/en/project/GA17-17139S" target="_blank" >GA17-17139S: Direct and indirect influence of Sc and Zr on early precipitation stages in advanced lightweight structural Al alloys</a><br>
Continuities
V - Vyzkumna aktivita podporovana z jinych verejnych zdroju
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Acta Physica Polonica A
ISSN
0587-4246
e-ISSN
1898-794X
Volume of the periodical
134
Issue of the periodical within the volume
3
Country of publishing house
PL - POLAND
Number of pages
5
Pages from-to
631-635
UT code for WoS article
000453257500005
EID of the result in the Scopus database
2-s2.0-85057752569