|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Magnesium Technology 2017
||Microstructure and Mechanical Properties of High Pressure Die Cast Mg-Al-Sn-Si Alloys
||Andrew D Klarner, Weihua Sun, Jiashi Miao, Alan A Luo
|On-Site Speaker (Planned)
||Andrew D Klarner
The effect of a small addition of Si was studied to increase the mechanical properties of Mg-Al-Sn alloys. Test specimens were produced by a vacuum die casting process which makes it possible to perform various heat treatments on the alloy. The addition of Si leads to the formation of a binary Mg2Si phase which contributes to an increase in strength in the as-cast condition. Aging treatments were performed to further increase the strength of the alloys by precipitation of fine Mg2Sn, Mg2Si, and Mg17Al12 phases. Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) techniques were used to observe these fine precipitates at different stages of the heat treatment and mechanical testing was performed to compare strength and ductility to previous magnesium alloys.