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- Title
Novel Ultrafine-Grain Mg-Gd/Nd-Y-Ca Alloys with an Increased Ignition Temperature.
- Authors
Šašek, Stanislav; Minárik, Peter; Stráská, Jitka; Hosová, Klára; Veselý, Jozef; Kubásek, Jiří; Král, Robert; Krajňák, Tomáš; Vojtěch, Dalibor
- Abstract
Two novel ignition-resistant magnesium alloys, Mg-2Gd-2Y-1Ca and Mg-2Nd-1Y-1Ca, were prepared in the ultrafine-grain condition by equal channel angular pressing (ECAP). In addition, four commercial alloys—AZ31, AX41, AE42 and WE43—were prepared similarly as a reference. The microstructure, mechanical properties and ignition temperature were thoroughly investigated. Both novel alloys exhibited a mean grain size of ~1 µm and dense distribution of small secondary phase particles. The mechanical strength measured by the tensile deformation test showed that the novel alloys are much stronger (~290 MPa) than all commercial alloys except WE43. However, Ca segregation into the grain boundaries caused a significant decrease in ductility (<6%). The ignition temperature of the novel alloys (~950 °C) was considerably improved by the presence of Gd/Nd, Y and Ca. This study showed that both novel alloys exhibit high strength and high ignition temperature in the ultrafine-grain condition.
- Subjects
IGNITION temperature; ALLOYS; TENSILE strength; CRYSTAL grain boundaries; TENSILE tests; MAGNESIUM alloys
- Publication
Materials (1996-1944), 2023, Vol 16, Issue 3, p1299
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma16031299