Effects of the Extrusion Temperature on Microstructure, Texture Evolution and Mechanical Properties of Extruded Mg–2.49Nd–1.82Gd–0.19Zn–0.4Zr Alloy

  • Lei Xiao
  • Guangyu YangEmail author
  • Shifeng Luo
  • Wanqi Jie
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


Microstructure, texture evolution and mechanical properties of extruded Mg–2.49Nd–1.82Gd –0.19Zn–0.4Zr alloy were investigated at extrusion temperatures of 260 °C, 280 °C, 300 °C and 320 °C, with an extrusion ratio of 15 and RAM speed of 3 mm s−1, respectively. The results indicated that the coarse grains of homogenized billets were substantially refined after the extrusion process, which was caused by the refinement of dynamically recrystallization (DRX) and the pinning effect of precipitated Mg5Gd and Mg12(Nd, Gd) particles. The grain size decreased gradually when the extrusion temperature increased from 260 to 280 and 300°C, and then coarsened slightly once the extrusion temperature further increased to 320 °C. Moreover, the DRX process was promoted with the increasing extrusion temperature, and a completely DRX microstructure could be obtained when the extrusion temperature up to 300 °C. The room temperature tensile and compressive yield strength increased when the temperature increased from 260 to 300 °C and then decreased at 320 °C. All extruded alloys exhibited an extremely low tension–compression yield asymmetry, which was mainly attributed to the rare earth (RE) texture component as well as the fine microstructure developed during the extrusion process.


Magnesium alloy Extrusion temperature Texture analysis Tension–compression yield asymmetry 



This work was supported by the National Natural Science Foundation of China (Nos. 51771152, 51227001 and 51420105005) and the National Key Research and Development Program of China (Grant No. 2018YFB1106800).


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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Lei Xiao
    • 1
  • Guangyu Yang
    • 1
    Email author
  • Shifeng Luo
    • 1
  • Wanqi Jie
    • 1
  1. 1.State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi’anPeople’s Republic of China

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