Bulk and Surface Low Temperature Phase Transitions in the Mg-Alloy EZ33A
Alexander Straumal,
Ivan Mazilkin,
Kristina Tzoy,
Boris Straumal,
Krzysztof Bryła,
Alexander Baranchikov,
Gunther Eggeler
Affiliations
Alexander Straumal
Institute of Solid State Physics RAS, Ak. Ossipyan str. 2, 142432 Chernogolovka, Russia
Ivan Mazilkin
Institute of Solid State Physics RAS, Ak. Ossipyan str. 2, 142432 Chernogolovka, Russia
Kristina Tzoy
Institute of Solid State Physics RAS, Ak. Ossipyan str. 2, 142432 Chernogolovka, Russia
Boris Straumal
Institute of Solid State Physics RAS, Ak. Ossipyan str. 2, 142432 Chernogolovka, Russia
Krzysztof Bryła
Institute of Technology, Pedagogical University of Cracow, Podchorazych str. 2, 30–084 Cracow, Poland
Alexander Baranchikov
Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Leninsky Prospect 31, 119991 Moscow, Russia
Gunther Eggeler
Ruhr-Universität Bochum, Faculty of Mechanical Engineering, Institute for Materials, Chair for Materials Science and Engineering, Universitätsstr. 150, D−44780 Bochum, Germany
Low-temperature phase transitions in the EZ33A Mg-cast alloy have been investigated. Based on the structure assessment of the alloy after annealing at 150 °C (1826 h) and at 200 °C (2371 h) a grain boundary wetting transition by a second solid phase was documented. Within a 50 °C temperature range, substantial differences in the α(Mg) grain boundary fraction wetted by the (Mg,Zn)12RE intermetallic were observed. In contrast to what was reported in the literature, two different types of precipitates were found within α(Mg) grains. With increasing annealing temperatures, both types of precipitates dissolved.
