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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Magnesium Technology 2020
Presentation Title Hierarchically Structured Ultrafine Grained Magnesium Alloys
Author(s) Rajiv S. Mishra
On-Site Speaker (Planned) Rajiv S. Mishra
Abstract Scope The intrinsic low density of magnesium drives research towards high performance magnesium alloys. Hierarchically structured ultrafine grained magnesium alloys possess exceptional strength-ductility combination and eliminate many of the traditional drawbacks like low strength, high yield strength asymmetry, poor formability and limited superplasticity. In this overview presentation, friction stir processed microstructures are used as examples to discuss the microstructural paradigms that can exhibit excellent balance of mechanical properties. These show the possibilities of exceeding 500 MPa strength with good work hardening and >10% ductility. Use of micron-sized boron carbide (B4C) and nano-sized yttria (Y2O3) powder can simultaneously enhance modulus-strength-ductility combination. High strength ultrafine grained magnesium alloys also show high strain rate superplasticity which can provide pathways for overcoming poor formability. An example of friction stir additive manufacturing will be used to discuss possibilities of implementing such microstructures at component level with emerging solid-state additive manufacturing techniques.
Proceedings Inclusion? Planned:

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Die-cast Magnesium Alloy for Applications at Elevated Temperatures
Al8Mn5 Particle Clustering on Oxide Films in Liquid AZ80 Magnesium Alloys
An Investigation into the Role of Dislocation Climb During Intermediate Temperature Flow of Mg Alloys
Anomalous Hydrogen Evolution on Magnesium
Application of Three-phase Miscibility Gap Formation Mechanisms in Mg Alloys
Asymmetric Rolling of TZ73 Magnesium Alloy to Improve Its Ductility
CALPHAD Modeling and Microstructure Investigation of Mg-Gd-Y-Zn Alloys
Cold Formability of Extruded Magnesium Bands
Corrosion Behavior of Squeeze Cast Mg Alloy AM60-based Hybrid Nanocomposite
Deformation Driven Precipitation in Binary Magnesium Alloys
Design of Ductile Rare-earth-free Magnesium Alloys
Design of the Magnesium Composite with High Corrosion Resistance and High Deformability
Development of Ultra Lightweight, Corrosion Resistant Mg Alloys
Deviations from Theoretical Orientation Relationship Along Tensile Twin Boundaries in Magnesium
Effect of 2 wt % Ag Addition on Corrosion Properties of ZK40 for Biodegradable Applications
Effect of Gd and Nd Additions on the Thermo-mechanical Response of a MgMn Alloy
Effect of Second Phase Particle Size on the Recrystallized Microstructure of Mg-Al Alloys Following ECAE Processing
Effect of Temperature on Magnesium Vapor Condensation in Inert Carrier Gas
Effects of Zn Additions on the Room Temperature Formability and Strength in Mg-1.2Al-0.5Ca-0.4Mn Alloy Sheets
Experimental Investigation of Raster Tool Path Strategy for Friction Stir Processing of Magnesium Alloy
F-35 (Invited): Magnesium Industries in 2020
F-36: Analysis of Deposition Path of Solid State Additive Manufacturing of AZ31 Mg Alloy
F-39: Effect of Annealing on Microstructure and Mechanical Properties of Mg-6Al Alloy Plates Processed by Differential Speed Rolling
F-40: Effect of Gradient Nanostructure on Microstructure and Mechanical Properties of AZ31 Magnesium Alloy under High Strain Fate
F-42: Effect of Zinc on Solidification and Aging Behaviour of Magnesium Alloys Containing Rare Earths
F-46: Improvement of Mechanical Properties of Mg Alloys Through Confined Rolling
F-47: Influence of Ag Additions on Formability and Strength of a Mg-Zn-Zr Alloy Subjected to Severe Plastic Deformation via Equal Channel Angular Pressing
F-50: In-vivo Performance of Bioabsorbable BioMg 250 Mg Alloy Implants
F-51: Microstructure and Hardness of Porous Magnesium Processed by Powder Metallurgy Using Polystyrene as the Space Holder
F-52: Microstructure and Mechanical Properties of Mg-6Sn Alloy Processed by Differential Speed Rolling
F-53: Novel Low-cost Magnesium Alloys with High Yield Strength and Plasticity
F-55: Preparing Magnesium Alloys for Electron Backscatter Diffraction
F-56: Quantifying Dislocation Behavior in Mg Using a Phase Field Dislocation Dynamics Model Multiple Active Slip Planes
F-58: Study on Creep Behavior and Microstructure Evolution of T6 State Mg-15Gd Metal Mold Casting Alloy
F-61: Thermomechanical Processing of Dilute Mg-Zn-Ca Alloys
Friction Stir Processing of Magnesium Alloy with Spiral Tool Path Strategy
Full-field Crystal Plasticity Modeling of {10-12} Twin Nucleation
Fundamental Deformation Mechanisms During Solid Phase Processing of Mg Alloys
Hierarchically Structured Ultrafine Grained Magnesium Alloys
In-situ TEM Investigation of Dislocations in Magnesium
Insights on Solidification of Mg and Mg-Al Alloys by Large Scale Atomistic Simulations
Intermetallic Phase Formation in Mg-Ag-Nd (QE) and Mg-Ag-Nd-Zn (QEZ) Alloys
Investigation and Modeling of the Influence of Cooling Rates on the Microstructure of AZ91 Alloys
Joining Dissimilar Materials via Rotational Hammer Riveting Technique
Mapping Anisotropy and Triaxiality Effects in Magnesium Alloys
Microstructure Evolution and Precipitation Strengthening in Ca-containing Mg-rare Earth Alloys
MultiStage Fatigue (MSF) Modeling of Magnesium in a Corrosion Environment
Novel Texture Controlling of Mg Alloys
Numerical Investigation of Micro-galvanic Corrosion in Mg Alloys: Role of the Cathodic Intermetallic Phase Size and Spatial Distributions
On the Influence of Twinning and Detwinning on the Deformation of Mg at the Micron Scale
Producing High Purity Magnesium (99.99%) Directly by Pidgeon Process
Producing Pure Magnesium Through Silicothermic under the Atmospheric Pressure
Recrystallization Effects on the Forming Behaviour of Magnesium Alloy Sheets with Varied Calcium Concentration
Relating Texture and Thermomechanical Processing Variables in Mg-Zn-Ca Alloys
Research on Properties of Prefabricated Pellets of Silicothermic Process After Calcination in Flowing Argon Atmosphere
Study of In-vitro Biodegradation Behavior of Mg-2.5Zn-xES Composite
The Effect of Plastic Deformation on the Precipitation Hardening Behavior of Biodegradable Mg-Sr-Ca-Zn Based Alloys
The Incorporation of Discrete Deformation Twins in a Crystal Plasticity Finite Element Framework
The Independent Effects of Cooling Rate and Na Addition on Hydrogen Storage Properties in Hypo-eutectic Mg Alloys
The Role of Faceting in {1012} Twin Nucleation
Thermodynamic Description and Thermophysical Properties of Mg-Gd Alloys and Quantitative Phase-field Simulation of their Solidification Process
Thixomolding Progress
Towards the Development of High Ductility Mg-Al Based Alloys Through Second-phase Refinement with Trace Yttrium Additions
Twin Transmission Across Grain Boundaries in Mg
Variation of Extrusion Process Parameter for the Magnesium Alloy ME21

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