Effect of rolling deformation on microstructure and properties of Mg-Zn-Y alloy

doi:10.13251/j.issn.0254-6051.2022.06.007

Abstract

Abstract: Effect of different rolling deformation on microstructure, mechanical properties and damping properties of Mg-4Zn-2Y alloy and Mg-4Zn-4Y alloy was investigated by means of optical microscope, dynamic mechanical thermal analyzer, X-ray diffraction and scanning electron microscope. The experimental results show that the lamellar LPSO phase appears in the alloy after rolling. With the increase of rolling deformation, the change of damping property Q^-1₀ that is independent of strain amplitude is basically the same, and the damping property Q^-1_h related to the strain amplitude decreases with the increase of rolling deformation. The damping mechanism of the Mg-4Zn-2Y alloy and Mg-4Zn-4Y alloy are the dislocation damping. With the increase of rolling deformation, the number of dimples in the fracture surface of the alloy increases, the dissociation surface decreases, thus the fracture mode changes from brittle fracture to ductile fracture. Under the same rolling deformation, the tensile strength of the Mg-4Zn-4Y alloy is higher than that of the Mg-4Zn-2Y alloy, but the damping capacity is lower than that of Mg-4Zn-2Y alloy.

Key words: Mg-Zn-Y alloy, damping capacity, rolling deformation, mechanical properties, microstructure

CLC Number:

TG146.4

Zhai Chuantian, Sun Youping, He Jiangmei, Meng Xiangchao, Wan Siyu. Effect of rolling deformation on microstructure and properties of Mg-Zn-Y alloy[J]. Heat Treatment of Metals, 2022, 47(6): 39-45.

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