A new high-strength Mg-Zn-Ce-Y-Zr magnesium alloy

A new high-strength Mg-5Zn-1Ce-0.5Y-0.6Zr (wt%) magnesium alloy with low rare-earth content was developed by extrusion and direct aging. The peak-aged sample exhibited a yield strength of 407 MPa and an ultimate tensile strength of 421 MPa. The yield strength of this alloy was much higher than those...

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Bibliographic Details
Published in:Journal of alloys and compounds 2016-12, Vol.688, p.537-541
Main Authors: Liu, Lizi, Chen, Xianhua, Pan, Fusheng, Gao, Shangyu, Zhao, Chaoyue
Format: Article
Language:English
Subjects:
Aging
Extrusion
Mechanical properties
Mg-Zn-Ce-Y-Zr alloy
Microstructure
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Summary:A new high-strength Mg-5Zn-1Ce-0.5Y-0.6Zr (wt%) magnesium alloy with low rare-earth content was developed by extrusion and direct aging. The peak-aged sample exhibited a yield strength of 407 MPa and an ultimate tensile strength of 421 MPa. The yield strength of this alloy was much higher than those of several Mg-Gd-Y alloys to which large amounts of rare-earth metals were added. The high strength of the alloy was closely related to the combined contributions of ultra-fine dynamically recrystallized grains (about 1 μm diameter), numerous nanoscale precipitates, and a strong basal texture. •A high-strength Mg-5Zn-1Ce-0.5Y-0.6Zr alloy with low RE content was developed.•A high yield strength (407 MPa) and moderate elongation (7.1%) are achieved.•The yield strength is much higher than those of several Mg-Gd-Y series alloys.•The high strength is related to fine grains, precipitates and texture.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2016.07.144