|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Magnesium Technology 2017
||Microsegregation in High Pressure Die Cast Mg Alloys
||Tracy Berman, Mei Li, John E Allison
|On-Site Speaker (Planned)
Expanding Integrated Computational Materials Engineering (ICME) capabilities for high pressure die cast (HPDC) and super vacuum die cast (SVDC) magnesium alloys will result in significant reductions in the time and cost required to develop components and optimize the casting and heat treatment processes. In this work, a description of segregation in SVDC Mg-Al binary and Mg-Al-Mn ternary alloys is obtained by combining quantitative electron probe micro-analysis (EPMA) mapping in conjunction with an EPMA forward simulation model. High precision MagmaSoft SVDC simulations are coupled with EPMA segregation profiles to develop a location-dependent microsegregation model that accounts for solute trapping. This approach successfully describes the macrosegregation and eutectic phase fraction observed through the casting thickness. Additionally, eutectic phase dissolution kinetics and changes in microsegregation after solution treatment are studied using EPMA mapping and DICTRA simulations. Approaches for incorporating these results into the emerging ICME capabilities for HPDC Mg will be described.