Hot deformation behavior and processing map of Mg-6Gd-1.2Y-0.53Zr alloy

doi:10.13251/j.issn.0254-6051.2023.01.020

Abstract

Abstract: Influence of deformation temperature (340-500 ℃) and strain rate (0.01-25 s^-1) on critical strain and volume fraction of dynamic recrystallization (DRX) of homogenized Mg-6Gd-1.2Y-0.53Zr alloy was studied by thermal simulation test. The range of hot processing parameters was optimized by constructing processing maps. The results show that the DRX critical strain increases with the increase of deformation temperature in the low strain-rate range of 0.01-1 s^-1, while it decreases slightly with the increase of deformation temperature in the high strain-rate range of 10-25 s^-1. The volume fraction of DRX increases with the increase of strain rate and deformation temperature. The dynamic recrystallization volume fraction is the highest and reaches 90.0% at 500 ℃, 25 s^-1. According to the constructed processing map, when the deformation is 30%-80%, the better hot processing range is 400-500 ℃, 0.01-1 s^-1 and 420-500 ℃, 10-25 s^-1. At the strain rate of 10-25 s^-1, when the deformation amount is 10%-80%, the most appropriate deformation temperature of the alloy is 460-500 ℃.

Key words: Mg-6Gd-1.2Y-0.53Zr alloy, hot deformation, critical strain, processing map

CLC Number:

TG146.2

Hu Jianling, Zhu Huaming, Yan Hongge, Chen Jihua, Xia Weijun, Zhang Meng. Hot deformation behavior and processing map of Mg-6Gd-1.2Y-0.53Zr alloy[J]. Heat Treatment of Metals, 2023, 48(1): 115-121.

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