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- Title
Microstructures and Mechanical Properties of Extruded Mg-Ho-Zn Alloys with Different Ho/Zn Ratios.
- Authors
Liu, Jiaan; Wang, Jie; Yang, Mengli; Zhang, Xiaoru; Che, Chaojie; Zhou, Dongwen; Wang, Yonghua
- Abstract
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.
- Subjects
ALLOYS; MICROSTRUCTURE; THERMAL stability; GRAIN size; ALLOY testing; TUNGSTEN alloys; FRACTOGRAPHY
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2020, Vol 72, Issue 4, p1552
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-019-03925-7