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Microstructure and Properties of Spark Plasma Sintered Al-Zn-Mg-Cu Alloy
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SYSNO ASEP 0473171 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Microstructure and Properties of Spark Plasma Sintered Al-Zn-Mg-Cu Alloy Tvůrce(i) Becker, H. (DE)
Dopita, M. (DE)
Stráská, J. (CZ)
Málek, P. (CZ)
Vilémová, Monika (UFP-V) RID, ORCID
Rafaja, D. (DE)Zdroj.dok. Acta Physica Polonica A. - : Polska Akademia Nauk - ISSN 0587-4246
Roč. 128, č. 4 (2015), s. 602-605Poč.str. 4 s. Forma vydání Tištěná - P Akce International Symposium on Physics of Materials (ISPMA) /13./ Datum konání 31.08.2014 - 04.09.2014 Místo konání Prague Země CZ - Česká republika Typ akce WRD Jazyk dok. eng - angličtina Země vyd. PL - Polsko Klíč. slova mechanical properties ; alloying elements Vědní obor RIV JK - Koroze a povrchové úpravy materiálů CEP GB14-36566G GA ČR - Grantová agentura ČR Institucionální podpora UFP-V - RVO:61389021 UT WOS 000366357300033 EID SCOPUS 84950256320 DOI https://doi.org/10.12693/APhysPolA.128.602 Anotace The microstructure of an aluminum alloy containing 53 wt% Zn, 2.1 wt% Mg and 1.3 wt% Cu as main alloying elements has been studied with the focus on the precipitation behavior during the spark plasma sintering process. The starting material was an atomized Al-Zn-Mg-Cu powder with the particle size below 50 mu m. The particles showed a solidification microstructure from cellular to columnar or equiaxed dendritic morphology with a large fraction of the alloying elements segregated in form of intermetallic phases, mainly (Zn, Al, Cu) 4 9 Mg 3 2 and Mg 2 (Zn, Al, Cu) 1 1, at the cell and dendrite boundaries. The microstructure of the sintered specimens followed the microstructure of the initial powder. However, Mg(Zn, Al, Cu) 2 precipitates evolve at the expense of the initial precipitate phases. The precipitates which were initially continuously distributed along the intercellular and interdendritic boundaries form discrete chain-like structures in the sintered samples. Additionally, fine precipitates created during the sintering process evolve at the new low-angle boundaries. The large fraction of precipitates at the grain boundaries and especially at the former particle boundaries could not be solved into the matrix applying a usual solid solution heat treatment. A bending test reveals low ductility and strength. The mechanical properties suffer from the precipitates at former particle boundaries leading to fracture after an outer fiber tensile strain of 3.8%. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2017
Počet záznamů: 1