Novel magnesium alloy containing Y, Gd and Ca with enhanced ignition temperature and mechanical properties for aviation applications

0546260 - FZÚ 2022 RIV NL eng J - Journal Article
Kubásek, J. - Minárik, P. - Hosová, K. - Šašek, S. - Knapek, M. - Veselý, J. - Stráská, J. - Dvorský, Drahomír - Čavojský, M. - Vojtěch, D.
Novel magnesium alloy containing Y, Gd and Ca with enhanced ignition temperature and mechanical properties for aviation applications.
Journal of Alloys and Compounds. Roč. 877, Oct. (2021), č. článku 160089. ISSN 0925-8388. E-ISSN 1873-4669
Institutional support: RVO:68378271
Keywords : extrusion * ignition temperature * magnesium * microstructure * rare-earth metals
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 6.371, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.jallcom.2021.160089

Novel Mg-4.5Gd-3.4Y-2.6Ca (wt%) alloy is designed as a light-weight material for manufacturing aircraft parts. The alloy is characterized by good mechanical properties and exceptionally high ignition temperature, which is a critical safety measure. The obtained results indicated a substantial effect of the extrusion temperature on the average grain size, the recrystallized fraction and texture formation. Microstructure condition directly affected the tensile and compressive behaviour with an observed average tensile yield strength of 302 MPa and 272 MPa for materials extruded at 350 °C and 400 °C, respectively. Both conditions featured a high ignition temperature of ≈ 1100 °C, which was attributed to the synergic effect of Y, Gd and Ca oxides, with the dominant effect of Y2O3. The achieved combination of enhanced mechanical properties and the ignition temperature makes this novel alloy a prominent candidate for aircraft applications.
Permanent Link: http://hdl.handle.net/11104/0322897