Abstract
Mg alloys with fine mechanical properties and high damping capacities are essential in engineering applications. In this work, Mg–Zn–Y based alloys with lamellar long period stacking ordered (LPSO) phases were obtained by different processes. The results show that a more lamellar second phase can be obtained in the samples with more solid solution atoms. The density of the lamellar LPSO phase has an obvious effect on the damping of the magnesium alloy. The compact LPSO phase is not conducive to dislocation damping, but sparse lamellar phases can improve the damping capacity without significantly reducing the mechanical properties. The Mg95.3Zn2Y2.7 alloy with lamellar LPSO phases and ~100 μm grain size exhibited a fine damping property of 0.110 at ε = 10–3.
Highlights
Damping performance refers to the reduction of unwanted vibrations in the structure without external dampers [1]
The effects of heat treatment processes and precipitation on magnesium alloy damping have been discussed [20], which shows that rod-shaped long period stacking ordered (LPSO) phases are favorable for obtaining high-damping and high-strength alloys
The damping capacities of Mg–Zn–Y-based alloys were simultaneously improved by obtaining the right amount of lamellar 14H-LPSO phase
Summary
Damping performance refers to the reduction of unwanted vibrations in the structure without external dampers [1]. Mg alloys have the best damping capacities in a wide variety of metal materials, so there is a need for the development of a high damping magnesium alloy that meets the needs of modern industry for vibration reduction [2]. Several techniques have been applied to improve the mechanics and damping of magnesium alloys such as heat treatment, alloying, and deformation processes [3,4,5,6]. These studies showed that the damping and mechanics of magnesium alloys are difficult to simultaneously improve. Wang studied the damping and mechanical properties of magnesium alloys containing the LPSO phase
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