Influence of Extrusion Deformation on Microstructure and Corrosion Resistance of Mg-Zn-Zr Alloy
Author of the article:HUI Zhongtao;YAN Ming
Author's Workplace：Xi'an University of Science and Technology,Xi'an 710054,China
Key Words：forward extrusion reciprocating extrusion Mg-Zn-Zr alloy microstructure corrosion resistance
Abstract：
Reciprocating extrusion and extrusion deformation were carried out on Mg-Zn-Zr alloy, the microstructure, phase composition and corrosion resistance of Mg-Zn-Zr alloy were studied. The results show that the grains of as-cast Mg-Zn-Zr alloy are coarse, the average size is about 160 μm, the vermicular eutectic structure can be seen at grain boundary, and coarse second phase particles can be seen in grain boundary. After reciprocating extrusion and forward extrusion deformation, dynamic recrystallization of Mg-Zn-Zr alloy is observed, fine second phase particles are uniformly distributed in the matrix. The corrosion resistance of Mg-Zn-Zr alloy by reciprocating extrusion is the best, followed by forward extrusion of Mg-Zn-Zr alloy, both of which are higher than that of as-cast Mg-Zn-Zr alloy.
