Transition phases; isothermal; electron microscopy; LiMaRC - Liège Materials Research Center
Abstract :
[en] Transition phases during isothermal aging of Zn-27% Al alloy at 250 °C are studied by means of transmission electron microscopy and diffraction technique. The supersaturated f.c.c. phase decomposes into transition phases by formation of GP zones m. Formation of the rhombohedral phases r and of h.c.p. precipitates (m, x) is observed. [fr] Les phases transitoires qui apparaissent au cours du vieillissement isotherme à 250 °C de l'alliage Zn-27% Al ont été étudiées au microscope électronique par transmission, en utilisant les techniques de diffraction. La phase C.F.C. sursaturée en zine se décompose par formation de zones de Guinier-Preston m. Les phases transitoires on été étudiées. La formation de la phase rhomoboedrique r et des précipités H.C. (m et x) a été observée.
Disciplines :
Physics Materials science & engineering Chemical engineering
Author, co-author :
Terziev, L.; Faculty of Chemistry, University of Sofia
Lecomte-Beckers, Jacqueline ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Science des matériaux métalliques
Rashev, P.; Central Institute for Computing Techniques and Technologies, Sofia
Greday, T.
Language :
English
Title :
Study of transition phases during isothermal aging at 250°C of Zn-27% Al alloy
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Bibliography
Lecomte‐Beckers J., Terziev L., Wegria J., Greday T., Proc. Internat. Symp. Zinc‐Aluminium Casting Alloys, The Metallurgical Society of CIM, Ser. 25–5/1, No. 1, Montreal; 1986, 23.
Lecomte‐Beckers J., Terziev L., Rashev P., Walmag G. J. Microscopie Spectroscopie électron 1989, 14:85.
Rashev P., Terziev L. Proc. IVth Symp. Physics of Metals , Piechowice, April 1987, Polish Academy of Sciences, Wroclaw; 1987, 98.
Ramlau P., Löffler H. Acta metall. 1987, 35:2005.
Simerska M., Bartuska P. (1977) Precipitation sequences and transformation kinetics in the Al-30 wt.% Zn alloy aged below 160°C. Czechoslovak Journal of Physics 27 B:655.
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