|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Magnesium Technology 2021
||Effects of Hot Isostatic Pressing on the Microstructure and Properties of Mg-Gd-Y-Zn Alloys
||Janet Meier, Joshua Caris, Alan Luo
|On-Site Speaker (Planned)
Hot isostatic pressing (HIP) treatment after annealing has been posited to simultaneously reduce casting porosity and increase mechanical properties of Mg-Gd-Y-Zn alloys with high long-period stacking order (LPSO) 14H phase fractions. Plate and cylinder samples of three different compositions were cut from permanent mold castings. The alloy samples were solution treated for 25 hours at 500°C and processed with the following HIP conditions: 485-490°C, 100-200 MPa, for 2 hours. Under accelerated corrosion conditions (submersion in 3%KCl at a temperature of 90oC), the corrosion rate was observed to increase after HIP. The mechanical properties generally increased with HIP. As there was little observed change to sample density, the authors attribute the change in corrosion rate and mechanical properties to microstructural changes with the HIP thermal cycle. CALPHAD analysis of the three compositions as well as scanning electron microscopy (SEM) microstructural observations are provided.
||Magnesium, Mechanical Properties,