Tensile Properties of Hot Extruded Mg-Zn-Nd-Y-Zr Alloy at Elevated Temperatures

Abstract:

Mechanical properties of extruded Mg-Zn-Nd-Y-Zr alloy are investigated by tensile tests at various temperatures range from room temperature to 350°C with strain rates of 6.0×10^-4-6.0×10^-1 s^-1. It is found that the peak decrease with increasing temperature and decreasing strain rate, while the elongation increases with increasing temperature and decreasing strain rate. When deformation temperature is over 250°C, superplasticity occurs. This is ascribed to grain boundary sliding accommodated cavities growth. . At low temperature, the peak stress are a relatively higher than that of ZK60 alloy. This is explained by the grain refining effect and the precipitates of Mg₉Nd and Mg₆Zn₃Y₂.

• Periodical: Advanced Materials Research (Volumes 415-417)
• Pages: 1157-1163
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.415-417.1157
• Online since: December 2011
• Authors: Xiao Zhou, Hai Tao Zhou, Zhen Dong Zhang, Rui Rui Liu, Li Bin Liu
• Keywords: Elevated Temperature, Mg-Zn-Nd-Y-Zr Alloy, Tensile Properties

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