RESPONSE OF AS-CAST Al-Zn-Mg-Cu ALLOY WITH Sc,Zr-ADDITION TO ANNEALING WITH CONSTANT HEATING RATE
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10387967" target="_blank" >RIV/00216208:11320/18:10387967 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
RESPONSE OF AS-CAST Al-Zn-Mg-Cu ALLOY WITH Sc,Zr-ADDITION TO ANNEALING WITH CONSTANT HEATING RATE
Original language description
The as-cast Al-Zn-Mg-Cu-based alloy with and without Sc,Zr-addition was studied during isochronal annealing from room temperature up to 480 °C. Precipitation reactions were studied by differential scanning calorimetry and microhardness measurements. These measurements were compared to microstructure development that was observed by scanning electron microscopy. Microstructure observation proved eutectic phase at grain boundaries in the as-cast state of both alloys. The measurements of positron lifetime (LT) spectroscopy confirmed the presence of Guinier-Preston (GP) zones in the initial state of both studied alloys. Neither structure nor volume fracture of eutectic phase shows changes after annealing up to 480 °C. The distinct changes in microhardness curves as well as in heat flow of the alloys studied are mainly caused by dissolution of GP zones and by formation of the particles of the Al-Zn-Mg-Cu system. The apparent activation energy values of the thermal processes were calculated. The hardening effect after isochronal annealing at temperatures above ~ 300 °C reflects the Sc,Zr-addition.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
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
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Conference proceedings
ISBN
978-80-87294-84-0
ISSN
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e-ISSN
neuvedeno
Number of pages
5
Pages from-to
1582-1586
Publisher name
Tanger Ltd.
Place of publication
Ostrava
Event location
Brno
Event date
May 23, 2018
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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