Phases Evolution and Y Solid Solution Microstructure in the Mg-6Zn-3Y Alloy Solidified under Super-High Pressure

Abstract:

The solidification microstructure of Mg-6Zn-3Y alloy under super-high pressure was investigated by using X-ray diffraction (XRD) and scanning electron microscope (SEM). The results show that the dendritic structure of Mg-6Zn-3Y alloy under super-high pressure (GPa level) can be evidently refined with the increase of solidification pressure. When the pressure increases to 2 GPa, Y element can’t solubilize in matrix of a-Mg, the primary Y solid solution is distributed in the shape of polygon block in the matrix. When the pressure is up to 4 GPa, the primary Y solid solution appears as symmetrical petaline shape. So Y solid solution exhibits the different morphology with the change of the pressure

• Periodical: Applied Mechanics and Materials (Volumes 148-149)
• Pages: 1347-1350
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.148-149.1347
• Online since: December 2011
• Authors: Yun Dong, Xiao Ping Lin, Run Guo Zheng, Shi Hui Jiao
• Keywords: Dendritic Structure, Polygonal Y Solid Solution, Refined Structure, Solidification under Super-High Pressure

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