Development of Magnesium-Rare Earth Die-Casting Alloys

Recent progress in materials used towards corrosion protection of Mg and its alloys

“…Mg has better vibration and noise dampening properties than Al and shows excellent castability and good ductility [30][31][32]. By alloying magnesium with zirconium [33], zinc [34], thorium [35], manganese [36], aluminum [37], or rare earth metals [38], the ratio of strength to weight increases, making these materials suitable choices where lightweight and the reduction of inertial forces are required. Due to this characteristic, denser cast iron, steel, copper-based alloys, and even Al-based alloys are replaced with Mg-based alloys [39,40].…”

Development of an Mg–RE-Based Die-Cast Magnesium Alloy for Elevated Applications

“…In addition to the Mg-Al based die-cast alloys, Al-free die-cast Mg alloys were developed for applications at elevated temperatures [30][31][32][33][34]. The Al-free die-cast Mg-2.5RE-0.35Zn alloy (MEZ) was developed with good creep resistance, but the ductility and strength of the alloy were low [31].…”

“…The Al-free die-cast Mg-RE-Zr-Zn alloys were well investigated with medium as-cast strength [32,33]. The Al-free die-cast Mg-4wt.%RE (La,Ce,Nd) alloy named HP2+ delivers higher mechanical performance especially creep resistance at elevated temperatures, which is a significant achievement for potential applications at 150-200 °C [30,34]. However, 4wt.% RE is near the maximum of Al-free die-cast Mg-RE alloys, and further addition of RE for higher working temperatures and elevated mechanical performance will make the Al-free die-cast Mg-RE alloys too brittle, with hot-tearing or die-soldering occurring during die-casting [34].…”