RESPONSE OF HOT ROLLED AL-ZN-MG-CU-(SC-ZR) ALLOYS TO ANNEALING WITH CONSTANT HEATING RATE

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10404954" target="_blank" >RIV/00216208:11320/19:10404954 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

RESPONSE OF HOT ROLLED AL-ZN-MG-CU-(SC-ZR) ALLOYS TO ANNEALING WITH CONSTANT HEATING RATE

Popis výsledku v původním jazyce

In the present work hot rolled AlZnMgCu alloys with and without Sc,Zr addition were studied. First, the temperature and time of annealing of hot rolling was looking for. Then, precipitation reactions of hot rolled alloys were studied by differential scanning calorimetry and microhardness measurements during annealing from room temperature up to 450 °C. These measurements were compared to microstructure development that was observed by scanning electron microscope and by electron backscattered diffraction. The grain size was ~ 20 microm in the AlZnMgCuScZr and ~ 1000 microm in the AlZnMgCu alloy. Microstructure observation proved eutectic phase at (sub)grain boundaries. Primary multilayer Al3(Sc,Zr) particles also precipitated during casting and subsequent cooling in the alloy with Sc,Zr addition. These particles were observed in the alloy with Sc,Zr addition after annealing up to 450 °C, too. In the DSC curves the exothermic process at ~ 200 °C was observed. Activation energy of the process was calculated. There were observed constant values of microhardness (in accuracy of measurements) during annealing up to 450 °C. Higher microhardness values were measured in the alloy with Sc,Zr addition.

Název v anglickém jazyce

RESPONSE OF HOT ROLLED AL-ZN-MG-CU-(SC-ZR) ALLOYS TO ANNEALING WITH CONSTANT HEATING RATE

Popis výsledku anglicky

In the present work hot rolled AlZnMgCu alloys with and without Sc,Zr addition were studied. First, the temperature and time of annealing of hot rolling was looking for. Then, precipitation reactions of hot rolled alloys were studied by differential scanning calorimetry and microhardness measurements during annealing from room temperature up to 450 °C. These measurements were compared to microstructure development that was observed by scanning electron microscope and by electron backscattered diffraction. The grain size was ~ 20 microm in the AlZnMgCuScZr and ~ 1000 microm in the AlZnMgCu alloy. Microstructure observation proved eutectic phase at (sub)grain boundaries. Primary multilayer Al3(Sc,Zr) particles also precipitated during casting and subsequent cooling in the alloy with Sc,Zr addition. These particles were observed in the alloy with Sc,Zr addition after annealing up to 450 °C, too. In the DSC curves the exothermic process at ~ 200 °C was observed. Activation energy of the process was calculated. There were observed constant values of microhardness (in accuracy of measurements) during annealing up to 450 °C. Higher microhardness values were measured in the alloy with Sc,Zr addition.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/GA17-17139S" target="_blank" >GA17-17139S: Přímý a nepřímý vliv Sc a Zr na raná precipitační stádia v moderních lehkých konstrukčních Al slitinách</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Conference proceedings

ISBN

978-80-87294-92-5

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

1541-1546

Název nakladatele

Tanger Ltd.

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

22. 5. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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