Bulk and Surface Low Temperature Phase Transitions in the Mg-Alloy EZ33A
A. B. StraumalInstitute of Solid State Physics RAS, Ak. Ossipyan str. 2, 142432 Chernogolovka, RussiaI. A. MazilkinInstitute of Solid State Physics RAS, Ak. Ossipyan str. 2, 142432 Chernogolovka, RussiaKristina TzoyInstitute of Solid State Physics RAS, Ak. Ossipyan str. 2, 142432 Chernogolovka, RussiaBoris B. StraumalInstitute of Solid State Physics RAS, Ak. Ossipyan str. 2, 142432 Chernogolovka, RussiaKrzysztof BryłaInstitute of Technology, Pedagogical University of Cracow, Podchorazych str. 2, 30–084 Cracow, PolandА. Е. БаранчиковKurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Leninsky Prospect 31, 119991 Moscow, RussiaGunther EggelerRuhr-Universität Bochum, Faculty of Mechanical Engineering, Institute for Materials, Chair for Materials Science and Engineering, Universitätsstr. 150, D−44780 Bochum, Germany
2020en
ABI
Abstract
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.
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