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Tailoring Mechanical Properties of Mg–Al–Zn–Sn–Mn Alloy by Multipass Equal Channel Angular Pressing
Author(s) -
Zha Min,
Wang Chun-Xue,
Jin Zhong-Zheng,
Jia Hai-Long,
Xu Hong,
Zhang Ping-Yu,
Huang Yu,
Ma Ping-Kui,
Wang Hui-Yuan
Publication year - 2021
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.202000790
Subject(s) - materials science , ultimate tensile strength , electron backscatter diffraction , alloy , microstructure , pressing , scanning electron microscope , severe plastic deformation , metallurgy , ductility (earth science) , grain size , texture (cosmology) , recrystallization (geology) , phase (matter) , composite material , creep , paleontology , image (mathematics) , chemistry , organic chemistry , artificial intelligence , computer science , biology
Herein, the influence of equal channel angular pressing (ECAP) routes, i.e., A and Bc, on the microstructure and texture evolution of a Mg–3.7Al–0.7Zn–0.8Sn–0.4Mn (wt%) alloy is investigated by scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and X‐ray diffraction (XRD). It is found that with increasing the number of ECAP passes, the area fraction of the dynamically precipitated secondary‐phase particles increases, whereas particle size becomes larger. After four and six passes of ECAP via route A, shear deformation induced by ECAP promotes the incline of c ‐axes toward extrusion direction (ED). The optimum room temperature (RT) mechanical properties (yield strength of ≈225 MPa, ultimate tensile strength of ≈312 MPa, and elongation to fracture of ≈31.9%) are obtained after four passes of ECAP at 200 °C via route A. The improved strength results from fine dynamic recrystallization (DRX)/ed grains, nanoscale secondary‐phase particles, and basal texture. Herein, it is indicated that Mg–Al–Zn–Sn alloys have great potential as low‐cost high‐strength‐ductility wrought Mg alloys.