Autor: Cieślar, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

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

Skocz do pozycji: 2.

Tytuł:: Electrical Resistivity and Positron Lifetime Studies of Precipitation Effects in Al-Cu-Based Alloys
Autorzy:: Melichova, O.
Vostrý, P.
Procházka, I.
Cieslar, M.
Stulíková, I.
Faltus, J.
Powiązania:: https://bibliotekanauki.pl/articles/2008146.pdf
Data publikacji:: 1999-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.70.Bj
61.72.Hh
81.30.Mh
Opis:: The improved workability of the commercial automatic machine designed alloy Al-Cu-Bi-Pb is guaranteed by the presence of Pb. Nevertheless, the toxic element Pb reduces some of the alloy properties. Therefore new Pb-free machinable Al-based alloys are developed. The Al-Cu-Bi-Sn alloy belongs to these non-traditional materials. The contribution deals with the investigation of precipitation effects in Al-Cu-Bi-Sn alloy during step-by-step isochronal annealing up to 500°C after previous solution heat treatment by means of positron annihilation spectroscopy completed with electrical resistivity measurements and results of independent transmission electron microscopy studies. The used combination of experimental methods gives the possibility to detect separately the redistribution of Sn and Cu atoms in the matrix and to study the influence of vacancies on this process.
Źródło:: Acta Physica Polonica A; 1999, 95, 4; 627-631
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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