TY - CONF A1 - Cabeza, Sandra T1 - Low alloyed Mg-Y/RE-Zn alloys: mechanical and corrosion behaviour N2 - Mg-Y,RE-Zn systems present second phases with high thermal stability, promoting the increase of strength and creep resistance at high temperatures. Mg and its alloys have a potential application as biomaterials due to their biocompatibility and degradation behaviour. The dominant corrosion mechanism in those alloys is the microgalvanic corrosion through coupling of the more noble second phases with the Mg matrix, and therefore a low concentration of those was sought. T2 - Mg 2015 CY - Jeju, South Korea DA - 12.10.2015 KW - Magnesium KW - LPSO KW - Corrosion behaviour KW - Mechanichal behaviour PY - 2015 AN - OPUS4-38398 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Cabeza, Sandra T1 - The evolution of internal strain in Mg-Y-Zn alloys with a long period stacking ordered phase N2 - The load partition in Mg-Y-Zn system is studied by means of synchrotron diffraction. in-situ tensile tests disclose LPSO phases were for the first time proved to behave as an efficient reinforcement in Mg-Y-Zn alloys, therefore they could be treated as “short-fibre composite” for the modeling of mechanical behaviour. T2 - MECASENS CY - Grenoble, France DA - 16.09.2015 KW - Magnesium KW - LPSO KW - Synchrotron diffraction KW - Load partition PY - 2011 AN - OPUS4-38397 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Cabeza, Sandra A1 - Garcés, G. A1 - Pérez, P. A1 - Adeva, Paloma T1 - Properties of WZ21 (%wt) alloy processed by a powder metallurgy route N2 - Microstructure, mechanical properties and corrosion behaviour of WZ21 (%wt.) alloy prepared by a powder metallurgy route from rapidly solidified powders have been studied. Results were compared to those of the same alloy prepared through a conventional route of casting and extrusion. The microstructure of the extruded ingot consisted of α-Mg grains and Mg3Zn3Y2 (W-phase) and LPSO-phase particles located at grain boundaries. Moreover, stacking faults were also observed within α-Mg grains. The alloy processed by the powder metallurgy route exhibited a more homogeneous and finer microstructure, with a grain size of 2 µm. In this case W-phase and Mg24Y5 phase were identified, but not the LPSO-phase. The microstructural refinement induced by the use of rapidly solidified powders strengthened the alloy at room temperature and promoted superplasticity at higher strain rates. Corrosion behaviour in PBS medium evidenced certain physical barrier effect of the almost continuous arrangements of second phases aligned along the extrusion direction in conventionally processed WZ21 alloy, with a stable tendency around 7 mm/year. On the other hand, powder metallurgy processing promoted significant pitting corrosion, inducing accelerated corrosion rate during prolonged immersion times. KW - Magnesium KW - RE KW - Microstructure KW - Creep KW - Corrosion PY - 2015 DO - https://doi.org/10.1016/j.jmbbm.2015.02.022 SN - 1751-6161 SN - 1878-0180 VL - 46 SP - 115 EP - 126 PB - Elsevier Ltd. CY - Amsterdam [u.a.] AN - OPUS4-32704 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -