|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Magnesium Technology 2017
||Corrosion and Creep Resistance of Thixomolded® Magnesium Alloys
||Ricardo Henrique Buzolin, Hajo Dieringa, Carsten Blawert, Hagen Frank, Chamini Lakshi Mendis, Andreas Lohmüller, Karl Ulrich Kainer, Norbert Hort
|On-Site Speaker (Planned)
Process optimization is one pathway to maximizing strength of a given alloy. Thixomolding is a semi-solid casting process that combines pores reduction with a typical bimodal grain size distribution that can lead to enhanced strength. AZ91D and MRI153 were processed via thixomolding using two different processing conditions to change fraction solid particles at the point of injection into the mold. The tensile properties, creep resistance and corrosion behavior of the alloys were investigated. The creep resistance was measured in the range of 135-150 oC and stresses of 50-85 MPa. The corrosion behaviour was measured via hydrogen evolution for the two alloys and was smaller than that for pure Mg. The MRI153 alloy showed improved creep resistance compared with the AZ91D. The differences in the property profile of the chosen alloys are correlated with their chemical compositions as well as with different microstructures obtained through the different processing conditions.