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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Magnesium Technology 2021
Presentation Title Effects of Hot Isostatic Pressing on the Microstructure and Properties of Mg-Gd-Y-Zn Alloys
Author(s) Janet M. Meier, Joshua Caris, Alan Luo
On-Site Speaker (Planned) Janet M. Meier
Abstract Scope 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.
Proceedings Inclusion? Planned:
Keywords Magnesium, Mechanical Properties,

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Effect of Annealing on Microstructure and Hardness of Mg-9Al Alloy Plates Processed by Single-pass Differential Speed Rolling
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Eutectic Modification of Mg2Si in Mg-Si Alloys for Faster Hydrogen Absorption Kinetics.
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Mechanical and Microstructural Behavior of Rolled AZ31B Magnesium Alloy under Three Different Stress States
Mechanisms and Machine Learning for Magnesium Alloys Design
Microstructure and Fracture Toughness of an Extruded Mg-Dy-Nd-Zn-Zr Alloy Influenced by Heat Treatment
Numerical Study of Multi-axial Loading Behavior of Mg Alloy AZ31 Extruded Bar
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Preparation of Thin-walled Magnesium AZ31 Alloy Tubes Using Friction Stir Extrusion
Quasi-static and Dynamic Rate Mechanical Behavior and Microstructural Investigation of High-purity Mg and AZ31B Alloy
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Role of Temperature and Pre-strain in Fatigue Strength of WE43-T5 Magnesium Alloy
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The Effects of Basal and Prismatic Precipitates on Deformation Twinning in AZ91 Magnesium Alloy
The High-solution Design of Magnesium Alloys
Thermally Activated Nature of Basal and Prismatic Slip in Mg and Its Alloys
Three Dimensional Atomistic Simulations of {101 ̅2} Non-cozone Twin -- Twin Interaction in Mg – Role of Twin Stability and Mobility
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Understanding Twinning: Detwinning Behavior of Unalloyed Mg during Low-cycle Fatigue Using High Energy X-ray Diffraction

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