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Effects of Phase Content and Evolution on the Mechanical Properties of Mg 95 Y 2.5 Zn 2.5 and Mg 93.1 Y 2.5 Zn 2.5 Ti 1.6 Zr 0.3 Alloys Containing LPSO and W Phases
Author(s) -
Wu Shouzhong,
Zhang Zhe,
Zhang Jinshan,
Xu Chunxiang,
Niu Xiaofeng,
Liu Wei
Publication year - 2017
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201700185
Subject(s) - materials science , extrusion , alloy , dynamic recrystallization , microstructure , ductility (earth science) , metallurgy , phase (matter) , recrystallization (geology) , composite material , hot working , creep , chemistry , paleontology , organic chemistry , biology
The effects of phase content and evolution on mechanical properties of the alloys are investigated by extruding Mg 95 Y 2.5 Zn 2.5 and Mg 93.1 Y 2.5 Zn 2.5 Ti 1.6 Zr 0.3 alloys with different original microstructures. The 18R‐LPSO phase plays a decisive role in the strength of as‐extruded alloys. The spherical W‐MgYZn 2 phase enhances the deformability and ductility of the alloys. The dynamic recrystallization grains can be observed in all as‐extruded alloys. However, the 14H‐LPSO clusters and dynamic precipitates only form in the as‐cast and T41‐treated (solid‐solution treatment at 530 °C for 3 h with water cooling) alloys after extrusion. Based on synergistic effects of these phases mentioned above, the T41‐treated Mg 93.1 Y 2.5 Zn 2.5 Ti 1.6 Zr 0.3 alloy exhibits good compressive mechanical properties after extrusion.