|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Magnesium Alloy Development: An LMD Symposium in Honor of Karl Kainer
||Intermetallic Phase Characteristics in the Mg-Nd-Zn System
||Domonkos Tolnai, Samuel A. Hill, Serge Gavras, Tungky S. Subroto, Ricardo H. Buzolin, Norbert Hort
|On-Site Speaker (Planned)
Neodymium, a Rare Earth with low solid solubility in Mg is an ideal alloying element to improve the yield strength and creep resistance cost effectively. The addition of Zn achieves a further improvement; however, its influence on the intermetallic phases in the Mg-Nd-Zn ternary system is not yet fully understood.
A Mg-5Nd alloy modified with 3, 5 and 7 wt.% of Zn was investigated with <I>in situ</I> synchrotron radiation diffraction during cooling from the molten state to 200 °C in order to investigate the phase-formation and -transformation characteristics of the alloys. The synchrotron diffraction results have been complemented with TEM investigations on the as-solidified samples. The results suggest that Zn has a strong effect on the microstructure by stabilizing the Mg<sub>3</sub>Nd phase and accelerating the precipitation formation. The experimental results do not fully comply with the theoretical calculations, indicating the necessity of improving the thermodynamic databank for this alloy system.