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Preparation and Characterization of Magnesium Alloy Containing Al₂Y Particles
Zhongtao Jiang1, Jun Feng2, Qiaowang Chen3
1Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing 402160, China. jiangtao6364@163.com.
Abstract:
A magnesium alloy containing Al₂Y particles was successfully fabricated by changing the content of Al in the Mg-6Y alloy melt. Its microstructure and mechanical properties were subsequently characterized. The results show that two types of Al₂Y particles were discovered in the Mg-6Y-xAl (x = 0.5⁻5) alloys, which are namely the polygonal particles in the pre-precipitated phase and the discontinuous network of particles in the eutectic phase. With an increase in Al content, the amount of pre-precipitated Al₂Y increases and the eutectic decreases gradually. When the Al content is 5 wt %, Al₂Y particles are almost all in the pre-precipitated phase in the Mg-6Y alloy. After hot extrusion, the YA65 alloy could be regarded as the Mg master alloy that contains Al₂Y particles with heterogeneous nucleation capability or Al₂Y particle-reinforced magnesium matrix composites. The tensile strength of the as-extruded magnesium alloy is significantly improved at ambient temperatures.
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