|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Magnesium Technology 2016
||Lattice Ordering and Microstructure of Ultra-high Strength Mg-Ca-Zn Alloys
||Alok Singh, Althaf Basha Dudekula, Naoko Ikeo, Hidetoshi Somekawa, Toshiji Mukai
|On-Site Speaker (Planned)
Magnesium alloying with calcium is very promising for mechanical strength. One of the promising alloys systems is ternary Mg-Zn-Ca. Recent results by the first principles calculation suggest that the combination of calcium and zinc possibly enhances the cohesive energy of grain boundary. In this work, Mg-Zn-Ca alloys with low alloying amounts of 0.3at% Ca and 0.6at% Zn were studied. Very fine grain size of smaller than 0.5 micron was achieved after extrusion. This resulted in superior mechanical properties of over 400 MPa yield strength with near 10% elongation. Microstructure showed sharp grain boundaries and fine dispersion of the ternary phase Ca2Mg6Zn3. Most interestingly, an ordering of atoms in the matrix was observed. These and more microstructural features will be described.
||Planned: A combination print-CD volume