Microstructure, Hot Deformation Behavior, and Textural Evolution of Mg-3Sn-2Al-1Zn-0.6Nd Alloy

Yuhang Guo,Pan Chen,Yibo Dai,Zhenya Zhang,Qianhao Zang

doi:10.3390/met12020364

Yuhang Guo, Pan Chen + Show 3 more

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https://doi.org/10.3390/met12020364

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Abstract

To prepare wrought magnesium alloys with excellent plastic deformation properties, Mg-3Sn-2Al-1Zn-0.6Nd alloys were prepared. A hot compression test of Mg-3Sn-2Al-1Zn-0.6Nd alloy was carried out on a thermo-mechanical simulator. The hot deformation behavior of the alloys was studied, and the constitutive equations and the processing map at the strain of 0.8 were established. The processing map exhibited the stable domain (temperature range of 320–350 °C and strain rate range of 0.001–0.04 s−1) with the high power dissipation efficiency (>30%). A large number of fine dynamic recrystallization (DRX) grains and deformed twinning existed in the alloy after the hot deformation. The dominant texture of the Mg-3Sn-2Al-1Zn-0.6Nd alloy is <0001>//CD texture after the hot deformation. The continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) were the dominant recrystallization mechanisms, and {101¯2} extension twinning also occurred in the alloy during the hot deformation.

Highlights

As typical wrought magnesium alloys, Al-Zn (AZ) series magnesium alloys have been widely applied in transportation industries because of their low density, high specific strength, good damping capacities, etc. [1,2]
It is widely accepted that the addition of Sn could improve the hot-working properties of magnesium alloys during hot compression, which is conducive to the promotion of dynamic recrystallization (DRX) of magnesium alloys, the reduction of flow stress, and the improvement of hot-working properties [3,4,5]
Zou et al [7] studied the effect of the addition of Sn with different contents on the dynamic recrystallization of Mg-5Zn-1Mn alloy under a high strain rate through hot compression experiments

Summary

Introduction

As typical wrought magnesium alloys, Al-Zn (AZ) series magnesium alloys have been widely applied in transportation industries because of their low density, high specific strength, good damping capacities, etc. [1,2]. It is widely accepted that the addition of Sn could improve the hot-working properties of magnesium alloys during hot compression, which is conducive to the promotion of dynamic recrystallization (DRX) of magnesium alloys, the reduction of flow stress, and the improvement of hot-working properties [3,4,5]. Jiang et al [6] studied the influence of Sn element on the microstructure evolution of magnesium alloy during the hot compression behavior by adding 2 wt.% Sn element to AZ80 magnesium alloy. The results indicated that the addition of Sn reduced the critical stress and strain of DRX, thereby promoting DRX. Zou et al [7] studied the effect of the addition of Sn with different contents on the dynamic recrystallization of Mg-5Zn-1Mn alloy under a high strain rate through hot compression experiments.

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