Effect of Solution Treatment on Microstructure and Properties of Gd - AZ91 Magnesium Alloy

5th Annual International Conference on Material Science and Environmental Engineering

材料科学;生态环境科学

Li, Yao^1 ; Wang, Huiling^1

Building J06, Jianghan University, Wuhan

430056, China^1

关键词: Alloy structures;    AZ91 magnesium alloys;    Granular compound;    Mg17Al12 phase;    Microstructure and properties;    Point structure;    Solution temperature;    Solution treatments;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/301/1/012009/pdf
DOI  :  10.1088/1757-899X/301/1/012009

来源: IOP

【 摘 要 】

In this paper, the Gd-AZ91 alloy was manufactured by adding rare earth element Gd in AZ91 magnesium alloy. The effects of solution treatment on the microstructures of rare earth elements Gd were investigated by means of optical microscopy, scanning electron microscopy, X-ray diffraction analysis and equipment for testing mechanical properties. The experimental results show that the addition of rare earth element Gd in AZ91 magnesium alloy can refine the alloy grain, turn β-Mg17Al12 phase into a discontinuous network or point structure, and produce granular compound Al2Gd in the alloy; when solution temperature is about 380 °C, the alloy structure is the best, the tensile strength of the alloy is the largest with the value larger than 250Mpa; when the solution temperature exceeds 380 °C, the alloy structure is coarsened and the mechanical properties of the alloy are reduced. With the increase of rare earth element Gd content, the tensile strength of the alloy shows a tendency to increase gradually, which Indicates that the addition of a certain amount of rare earth elements Gd can improve the plasticity of the alloy.