Table of Contents
Research Letters in Physics
Volume 2008, Article ID 476812, 4 pages
Research Letter

Comparison of the Solid Solution Properties of Mg-RE (Gd, Dy, Y) Alloys with Atomistic Simulation

1Department of Materials, College of Electromechanical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
2Department of Applied Physics, Hunan University Changsha, Hunan 410082, China

Received 30 May 2008; Accepted 11 September 2008

Academic Editor: Ravindra Pandey

Copyright © 2008 Yurong Wu and Wangyu Hu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Molecular dynamic simulations have been performed to study the solid solution mechanism of Mg100-xREx ( R E = G d , D y , Y , 𝑥 = 0 . 5 , 1 , 2 , 3 , 4 a t . % ). The obtained results reveal that the additions of Gd, Dy and Y increase the lattice constants of Mg-RE alloys. Also the axis ratio c/a remains unchanged with increase in temperature, restraining the occurrence of nonbasal slip and twinning. Furthermore, it is confirmed that bulk modulus of Mg alloys can be increased remarkably by adding the Gd, Dy, Y, especially Gd, because the solid solubility of Gd in Mg decrease sharply with temperature in comparison with Dy and Y. Consequently, the addition of the RE can enhance the strength of Mg-based alloys, which is in agreement with the experimental results.