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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Magnesium Alloy Development: An LMD Symposium in Honor of Karl Kainer
Presentation Title C-57: Precipitate Strengthening Mechanisms in Different Mg Alloys by In Situ Synchrotron X-ray Diffraction
Author(s) Xiaoqin Zeng, Leyun Wang, Jie Wang, Bijin Zhou, Wen Wen
On-Site Speaker (Planned) Xiaoqin Zeng
Abstract Scope Precipitation is a primary strengthening approach for Mg alloys. The underlying strengthening mechanisms by various precipitates may be different. In this presentation, we use in situ synchrotron X-ray diffraction to study the strengthening mechanisms by the long-period stacking ordered (LPSO) phase in Mg-Y-Zn and the β1 phase in Mg-Nd. Lattice strain development in the precipitate phases was compared with that in the Mg matrix during tensile deformation. In Mg-Y-Zn, lattice strain in LPSO was apparently higher than that in the Mg matrix after material yielding, indicating a direct load transfer. On the other hand, such a load transfer is less obvious in Mg-Nd. Instead, analysis of peak width and texture evolution suggests that β1 precipitates would lead to higher dislocation density and lower twin density in Mg during deformation. The different strengthening mechanisms by LPSO and β1 are related to the stress-strain curves of the two alloys.
Proceedings Inclusion? Planned:

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Alloy Design for the Development of Heat-Treatable High-Strength Mg-Zn-Ca-Zr Sheet Alloy with Excellent Room Temperature Formability
Biodegradable Mg-Y and Mg-Li Alloys with the Addition of Ca and Zn for Medical Application
C-49: Corroding Magnesium Implants – a New Class of Biomaterials
C-50: Development and Characterization of Mg-4Zn-0.5Ca-0.16 Mn (wt. %) Alloy for Biomedical Applications
C-51: Development of Ultralight and Ultrafine Grained Mg-4Li-1Ca Alloy for Biomedical and Lightweight Applications
C-53: Magnesium Nanocomposites, Progress and Potential
C-54: Metal Injection Molding (MIM) of Mg-alloys
C-55: Microstructure Evolution and Mechanical Properties of Thin Strip Twin Roll Cast (TRC) Mg Sheet
C-56: Orientation and Length Scale Effect in Deformation Mechanism in Pure Magnesium
C-57: Precipitate Strengthening Mechanisms in Different Mg Alloys by In Situ Synchrotron X-ray Diffraction
C-58: The Effect of Shearable Plate-shaped Precipitates on the Strength of Mg Alloys
Co-precipitation on the Basal and Prismatic Planes in Mg-Gd-Ag-Zr Alloy Subjected to Over-ageing
Creep Resistant Mg-Mn Based Alloys for Automotive Powertrain Applications
Degradable Magnesium Implants - Assessment of the Current Situation
Development of Heat-Treatable High-Strength Mg-Zn-Ca-Zr Sheet Alloy with Excellent Room Temperature Formability
Development of Magnesium-Rare Earth Die-casting Alloys
Development of Magnesium Sheets
Effects of Severe Plastic Deformation on Mechanical Properties and Corrosion Behavior of Magnesium Alloys
Enhancing Impact Toughness of Mg-3%Al-1%Zn Alloy by Grain Structure Modification
Evolution of the Dislocation Structure during Compression in a Mg-Zn-Y Alloy with Long Period Stacking Ordered Structure
Interaction between Propagating Twins and Non-shearable Precipitates in Magnesium Alloys
Intermetallic Phase Characteristics in the Mg-Nd-Zn System
Magnesium Pistons in Engines: Fiction or Fact?
Recent Developments in the Application of the Interdependence Model of Grain Formation and Refinement
Solidification Analysis of Grain Refined AZ91D Magnesium Alloy via Neutron Diffraction
Solutions for Next Generation Automotive Lightweight Concepts Based on Material Selection and Functional Integration
Study on Mg-Si-Sr Ternary Alloys for Biomedical Applications
Thermodynamics of Phase Formation in Mg–Al–C Alloys Applied to Grain Refinement

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