|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Magnesium Technology 2018
||C-69: Evolution of Microstructure and Mechanical Properties during the Casting and Rolling of the ZEK100 Sheet
||Amjad Javaid, Frank Czerwinski
|On-Site Speaker (Planned)
The use of magnesium sheet in automotive light-weighting initiatives is very limited due to its poor formability at room temperature. In this investigation the cast ZEK100 (Mg-1.2Zn-0.35Zr-0.17Nd, in wt.%) alloy was subjected to rolling at temperatures from 350 to 450C. The evolution of microstructure, tensile and compressive properties was examined after each rolling temperature and compared to as-cast state. The phase composition, determined by EDX and metallography, was verified by calculations using the FACTsage software. To assess strengthening during rolling, properties were also measured after annealing following each rolling. The results show that increasing the rolling temperature caused reduction of tensile strength, yield and compressive strength but increasing elongation. A correlation was established between mechanical properties and grain size, which experienced coarsening during hot rolling. The results are discussed in terms of the role the rare earth elements play in controlling the formability of magnesium alloys.