HREM and HAADF Studies of Precipitates in the Mg-Y-Nd Alloy System

Wei Sun; Li Sun; Lin Lin Liu; Ze Zhang

doi:10.4028/www.scientific.net/MSF.561-565.275

Paper Titles

Fatigue in Ti-6Al-4V at Very High Cycles
p.259

3D Image-Based Modeling of Ductile Fracture in an Aluminum Alloy Using Synchrotron X-Ray CT Images
p.263

Fatigue Fracture Behavior of Mg-Zn-Y Alloys
p.267

Developments of Magnesium Alloys by Melt Stirring Method
p.271

HREM and HAADF Studies of Precipitates in the Mg-Y-Nd Alloy System
p.275

Microstructural Characterization and Temperature Analysis in Friction Stir Welding of A383/5052 Dissimilar Aluminum Alloys
p.279

First-Principles Calculation of Interaction Energies between Solutes and/or Vacancies for Predicting Atomistic Behaviors of Microalloying Elements in Aluminum Alloys
p.283

Influences of Rolling Conditions on Texture and Mechanical Properties of AZ31 Magnesium Alloy Processed by Differential Speed Rolling
p.287

Effect of Granule Size in Semi-Solid Slurry on Rheo-Extrusion of A7075 Aluminum Alloy
p.291

HomeMaterials Science ForumMaterials Science Forum Vols. 561-565HREM and HAADF Studies of Precipitates in the...

HREM and HAADF Studies of Precipitates in the Mg-Y-Nd Alloy System

Abstract:

By means of high resolution transmission electron microscopy (HREM) and high-angle annular dark-field image technique (HAADF), morphological, structural and compositional characteristics of the precipitates in the Mg-4Y-3Nd alloy aged at 200°C for different periods of time have been studied. On the basis of HREM observations, an atomic structural model for the β’-precipitate with an orthorhombic unit cell has been proposed. The characteristic distribution of the precipitates which are rich in rare-earth elements (Y, Nd) has been clearly revealed by the HAADF imaging technique.