PRECIPITATION HARDENING IN AS-CAST AA6082 AND AA5754 COMMERCIAL ALLOYS WITH Sc, Zr-ADDITION

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25797000%3A_____%2F18%3AN0000019" target="_blank" >RIV/25797000:_____/18:N0000019 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/18:10388149

Result on the web

<a href="https://konsystest.tanger.cz/files/uploads/02/Metal2018_Conference_Proceedings_Content.pdf" target="_blank" >https://konsystest.tanger.cz/files/uploads/02/Metal2018_Conference_Proceedings_Content.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

PRECIPITATION HARDENING IN AS-CAST AA6082 AND AA5754 COMMERCIAL ALLOYS WITH Sc, Zr-ADDITION

Original language description

The as-cast AA5754 and AA6082 alloys with Sc,Zr-addition were investigated during isochronal annealing from room temperature up to 510 °C. Precipitation reactions were studied by electrical resistivity, hardness measurements and differential scanning calorimetry. The measurements were compared to microstructure development that was observed by transmission electron microscopy. Higher initial resistivity as well as hardness values are probably caused by a higher content of the solutes in the AA5754-ScZr alloy in comparison with the latter alloy. Both alloys contains spherical particles of the Al3(Sc,Zr) phase in the as-cast state. Moreover, the AA6082-ScZr alloy contains rods and needles of the Mn,(Fe)-containing phase. The transient Al–Mg–Si-phase (β’’ and/or β’) particles formed during isochronal annealing in the AA6082-ScZr alloy cause a poor age hardening. The additional Al3(Sc,Zr) particles precipitation causes a pronounced hardening in the AA5754-ScZr alloy. The possible (weak) additional precipitation of the Al3(Sc,Zr) particles in the AA6082-ScZr alloy has a lower effect on hardness than the precipitation of ’’ and ’ phases or Sc and Zr solutes are probably bound in the Al3(Sc,Zr) particles and do not influence precipitation hardening in the course of isochronal annealing in the AA6082 alloy. The precipitation of the Al6(Mn,Fe)-phase was observed in the alloys during the isochronal heat treatment. The apparent activation energy values of precipitation of the transient β’’ and/or β’ phases, Al6(Mn,Fe)-phase and Al3(Sc,Zr) phase were determined.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10303 - Particles and field physics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2018

Confidentiality

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

Article name in the collection

METAL 2018, 27th International Conference on Metallurgy and Materials

ISBN

978-80-87294-84-0

ISSN

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e-ISSN

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Number of pages

6

Pages from-to

1605-1610

Publisher name

Tanger Ltd.

Place of publication

Ostrava Czech republic

Event location

Brno

Event date

Jan 1, 2018

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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