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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Magnesium Technology 2021
Presentation Title Measurement of the Critical Resolved Shear Stress for Slip in Mg Alloys Using Instrumented Indentation
Author(s) Warren J. Poole, Shuheng Li, Ghazal Nayyeri
On-Site Speaker (Planned) Warren J. Poole
Abstract Scope A critical challenge for the plasticity and fracture of magnesium and its alloys is the competition between the different deformation modes and how this changes with temperature. In the current study, the critically resolved shear stress for basal slip as a function of alloy composition and temperature has been measured using instrumented spherical indentation. Indentation offers the advantage that tests can be conducted on grains of known orientation in polycrystal samples, particularly of importance for alloys where producing single crystals is difficult. Here, it will be demonstrated that by doing tests with indenters of different radii, the critically resolved shear stress (CRSS) for can be extracted. Very good agreement was found between the CRSS values for basal slip by indentation and the literature values from single crystal tests. Finally, the contribution will also offer perspectives on quantifying additional deformation modes such as extension twining and 2nd order pyramidal slip.
Proceedings Inclusion? Planned:
Keywords Magnesium, Mechanical Properties,

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Absorbable Wire Radiopacity: Influence of Composition and Size on X-ray Visibility
Accounting for the Effects of Dislocation Climb Mediated Flow in Mg alloy ZK10 Sheet
Achieving Excellent Room Temperature Formability and High Strength in Wrought Magnesium Alloy Sheets
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Development of a Low-cost and Room-temperature Formable Mg Alloy Sheet with In-plane Isotropic Tensile Properties
Effect of Annealing on Microstructure and Hardness of Mg-9Al Alloy Plates Processed by Single-pass Differential Speed Rolling
Effect of Processing Parameters on the Microstructure and Mechanical Behavior of Additively Manufactured WE43 Mg Alloy
Effects of Hot Isostatic Pressing on the Microstructure and Properties of Mg-Gd-Y-Zn Alloys
Efficient Low-cost Gravity-driven Multiple Effect Thermal System (G-METS) Distillation of Magnesium
Eliminating Yield Anisotropy and Enhancing Ductility in Mg Alloys by Shear Assisted Processing and Extrusion
Eutectic Modification of Mg2Si in Mg-Si Alloys for Faster Hydrogen Absorption Kinetics.
Industrial Practice of Extracting Magnesium from Serpentine
Liquid Enhanced Ga-Sn Alloy Anode for RMBs
Low-cost Magnesium Primary Production Using Gravity-driven Multiple Effect Thermal System (G-METS) Distillation
Magnesium and Magnesium Alloy Powder Processing Towards the Development of Near Shape Structural Materials
Measurement of the Critical Resolved Shear Stress for Slip in Mg Alloys Using Instrumented Indentation
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
On the Role of Crystallographic Anisotropy and Texture in Damage Tolerance of Magnesium and its Alloys
Optimization of Mechanical Properties in Magnesium Zinc Alloys
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
Revisiting Pyramidal Slip in Magnesium
Role of Temperature and Pre-strain in Fatigue Strength of WE43-T5 Magnesium Alloy
Texture and Microstructure Evolution in Thermomechanically Processed Mg-Ca and Mg-Zn-Ca Alloys
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
Three Dimensional Interaction of {101 ̅2} Twins with Tilt Boundaries in Mg: Twin and Dislocation Transmission
Understanding Twinning: Detwinning Behavior of Unalloyed Mg during Low-cycle Fatigue Using High Energy X-ray Diffraction

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