|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Magnesium Technology 2017
||The Effects of Ca Addition on Microstructures and Mechanical Properties of Gravity Cast Mg-Zn-Y Alloy
||Young-Gil Jung, Youngkyun Kim, Shae K. Kim, Hyunkyu Lim, Do Hyang Kim
|On-Site Speaker (Planned)
Mg-Zn-Y alloys with I-phase, that is quasicrystalline phase, are well known for wrought Mg alloys. These alloys have exhibited good combination of high strength and large elongation because I-phase has a strong bond and low interfacial energy with matrix. On the other hand, these alloys could be used as the cast alloys because the I-phase exhibits better thermally stability than many other phases, which could enhance creep resistance at elevated temperature.
In this study, the effects of Ca addition on microstructures and mechanical properties of Mg-8Zn-1.6Y alloy (ZW82) were investigated to develop non heat-treatable creep resistant Mg alloys. The test specimens were prepared by casting into a steel mold whose size is 90 w × 150 h × 40 t. The tensile tests were performed at room temperature and 150 <sup>o</sup>C. Also creep tests were carried out at 150 <sup>o</sup>C under 100 MPa.