pp 1–9 | Cite as

Microstructures and Mechanical Properties of Extruded Mg-Ho-Zn Alloys with Different Ho/Zn Ratios

  • Jiaan LiuEmail author
  • Jie Wang
  • Mengli Yang
  • Xiaoru Zhang
  • Chaojie Che
  • Dongwen Zhou
  • Yonghua Wang
Aluminum and Magnesium: New Alloys and Applications


The microstructures and mechanical properties of as-extruded Mg-Ho-Zn alloys with various Ho/Zn ratios have been investigated. The grain size is refined with increasing Ho addition. The presence of second phase in the alloys, i.e., long-period stacking ordered (LPSO) phase and W-phase, is dependent on the Ho/Zn ratio. The strength of the alloys decreased as the test temperature was increased. Among the experimental alloys, the alloy containing LPSO-phase exhibited the best comprehensive mechanical properties at both room and high temperatures, due to the high plasticity and good thermal stability of the LPSO-phase. Related mechanisms were analyzed via metallographic and fractographic examination and then discussed. A schematic diagram was established to further reflect the different roles of W-phase and LPSO-phase in the fracture behavior of the alloys.



This work is supported by the Science and Technology Project of Education Department of Jilin Province and National Natural Science Foundation of China (Nos. 51201068 and 51705033).

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Jiaan Liu
    • 1
    Email author
  • Jie Wang
    • 1
  • Mengli Yang
    • 1
  • Xiaoru Zhang
    • 1
  • Chaojie Che
    • 1
  • Dongwen Zhou
    • 1
  • Yonghua Wang
    • 2
  1. 1.Key Laboratory of Automobile Materials (Ministry of Education), College of Materials Science and EngineeringJilin UniversityChangchunPeople’s Republic of China
  2. 2.School of Mechanical and Electric EngineeringChangchun University of Science and TechnologyChangchunPeople’s Republic of China

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