Autor: Poková, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Recrystallization in Multilayer Al99.99/AlMg3 Laminates Prepared by Accumulative Roll-Bonding
Autorzy:: Cieslar, M.
Poková, M.
Zimina, M.
Veselý, J.
Bajer, J.
Powiązania:: https://bibliotekanauki.pl/articles/1402060.pdf
Data publikacji:: 2015-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 81.40.Ef
81.40.Lm
61.72.Ff
81.40.-z
Opis:: Composite multilayer sheets from Al/AlMg3 with 32 alternating layers of Al and AlMg3 were prepared by accumulative roll-bonding and their thermal stability was studied. Recrystallized 2 mm thick sheets of a commercial twin-roll cast AlMg3 alloy and high purity Al99.99 served as input materials. Electrical resistivity measurements were used for the integral monitoring of solute atoms distribution during annealing. Light optical microscopy was employed for the direct grain-size determination and recrystallization description. Post-mortem electron microscopy observations were performed on as-prepared and annealed specimens and they were combined with in situ heating electron microscopy in order to explain the observed annealing effects. A broadening of Al layers during annealing was observed and related to diffusion of magnesium.
Źródło:: Acta Physica Polonica A; 2015, 128, 4; 487-490
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: The Evolution of Microstructure and Mechanical Properties of Al-Mn-Fe-Si Alloys During Isothermal Annealing
Autorzy:: Poková, M.
Zimina, M.
Cieslar, M.
Powiązania:: https://bibliotekanauki.pl/articles/1402144.pdf
Data publikacji:: 2015-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 68.37.Lp
68.37.Hk
81.30.Mh
81.40.Ef
61.72.Mm
Opis:: Recrystallization during isothermal annealing is studied in a twin-roll cast Al-Mn-Fe-Si alloy with Zr addition. Al₃Zr precipitates, which are known to improve the recrystallization resistance by exerting the Zener drag on migrating grain boundaries, form during heat treatment at 450°C. Materials with and without Al₃Zr precipitates are subjected to 4 passes of equal channel angular pressing at room temperature and a submicrometric grain size is achieved. In the course of isothermal annealing materials recrystallize at 400°C, 425°C and 450°C. The time required for recrystallization follows an Arrhenius equation. Recrystallization kinetics is similar independently of the presence of Al₃Zr precipitates. Precipitation of α-Al(Mn,Fe)Si particles is thought to increase the recrystallization resistance in the material without Al₃Zr.
Źródło:: Acta Physica Polonica A; 2015, 128, 4; 746-749
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: The Study of the Behavior of Constrained Groove Pressed Magnesium Alloy after Heat Treatment
Autorzy:: Zimina, M.
Bohlen, J.
Letzig, D.
Kurz, G.
Poková, M.
Knapek, M.
Zrník, J.
Cieslar, M.
Powiązania:: https://bibliotekanauki.pl/articles/1402154.pdf
Data publikacji:: 2015-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 62.20.F-
62.20.Qp
81.05.Bx
81.05.Zx
Opis:: In this work twin-roll cast AZ31 magnesium strip of thickness 5.6 mm was subjected to the heat treatment and further constrained groove pressing. A comparison of the microstructure and microhardness of as-cast, constrained groove pressed and annealed material was carried out. The twin-roll cast strip exhibits an inhomogeneous structure which is replaced by a finer and uniform recrystallized one after aging at 450°C for 10 h. A significant increase of the microhardness was observed accompanied by a pronounce grain refinement. Nevertheless, the distribution of the grain size is unequal along the specimen width. Thermal stability of the deformed structure during subsequent annealing was investigated. It was shown that higher annealing temperatures result in a formation of a more uniform recrystallized structure and in a significant drop of microhardness down to the values obtained for as-cast alloy.
Źródło:: Acta Physica Polonica A; 2015, 128, 4; 775-778
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: The Influence of Silicon Content on Recrystallization of Twin-Roll Cast Aluminum Alloys for Heat Exchangers
Autorzy:: Poková, M.
Cieslar, M.
Lacaze, J.
Powiązania:: https://bibliotekanauki.pl/articles/1419112.pdf
Data publikacji:: 2012-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 81.40.Ef
68.37.Lp
81.30.Mh
Opis:: Thin foils of aluminum alloys are commonly used in automotive industry for manufacturing heat exchangers. Use of twin-roll casting instead of direct-chill casting requires modifications in the manufacturing process and use of improved materials. In the present study, the evolution in microstructure and mechanical properties during isochronal annealing of two AW3003-based alloys differing in silicon content was monitored. The silicon influenced both the microhardness and precipitation kinetics during annealing, but not the recrystallization temperature. Precipitation of cubic $\alphs-Al_{15}(Mn,Fe)_3Si_2$ phase occurred in two steps in the material with higher Si content, while mainly precipitates of $Al_6(Mn,Fe)$ phase formed in the second material in a broad temperature interval, preferentially at grain boundaries.
Źródło:: Acta Physica Polonica A; 2012, 122, 3; 625-629
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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