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Annealing Effects in Cast Commercial Aluminium Al-Mg-Zn-Cu(-Sc-Zr) Alloys
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SYSNO ASEP 0519299 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Annealing Effects in Cast Commercial Aluminium Al-Mg-Zn-Cu(-Sc-Zr) Alloys Tvůrce(i) Vlach, M. (CZ)
Čízek, J. (CZ)
Kodetová, V. (CZ)
Kekule, T. (CZ)
Lukáč, František (UFP-V) ORCID
Cieslar, M. (CZ)
Kudrnová, H. (CZ)
Bajtošová, L. (CZ)
Leibner, M. (CZ)
Harcuba, P. (CZ)
Málek, J. (CZ)
Neubert, V. (CZ)Celkový počet autorů 12 Zdroj.dok. Metals and Materials International. - : Korean Institute of Metals and Materials - ISSN 1598-9623
Roč. 25, May (2021), s. 995-1004Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. KR - Korejská republika Klíč. slova al-mg alloy ; mechanical-properties ; microstructure evolution ; precipitation processes ; aging behavior ; high-level ; zr alloy ; sc ; cu ; particles ; 7xxx series ; Clusters ; tem ; Positron annihilation ; Al-3(Sc,Zr) particles ; Activation energy Obor OECD Materials engineering Způsob publikování Omezený přístup Institucionální podpora UFP-V - RVO:61389021 UT WOS 000491937400001 EID SCOPUS 85074261087 DOI 10.1007/s12540-019-00499-6 Anotace Precipitation reactions of the cast Al-3.4 at%Mg-2.7 at%Zn-0.80 at%Cu-0.10 at%Fe-0.05 at%Si alloy with and without addition of 0.14 at%Sc and 0.06 at%Zr were characterized by electrical resistometry, electron microscopy, X-ray diffraction, thermal analysis, microhardness testing, and positron annihilation. The AlMgZnCuScZr alloy contains a grain boundary T-phase (Mg-32(Al,Cu,Zn)(49)) with a cubic and/or quasicrystalline structure. The AlMgZnCu alloy contains a mixture of MgZn2- and the T-phase. Primary multilayer Al-3(Sc,Zr) particles precipitated during casting and subsequent cooling. The particles have a layered Al-3(Sc,Zr) + alpha-Al + Al-3(Sc,Zr) structure, i.e. consist of regions enriched with both Sc and Zr. Small atomic Mg,Zn(,Cu)-rich clusters coherent with the matrix were formed during the cooling of both alloys and/or in the course of their storage at ambient temperature. Their dissolution enables precipitation of the transient eta '- and/or stable eta-phases of the AlZnMgCu system in both investigated alloys. The effective activation energy for the dissolution of the clusters was calculated as similar to 103 kJ/mol. Annealing of the AlMgZnCuScZr alloy above 300 degrees C leads to a formation of the secondary Al-3(Sc,Zr) particles which cause precipitation hardening and guarantee thermal stability of mechanical properties. Addition of Sc and Zr micro alloying elements resulted in a substantial grain refinement. The grain size remains unchanged up to isochronal annealing at 390 degrees C. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2023 Elektronická adresa https://link.springer.com/article/10.1007%2Fs12540-019-00499-6
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