Dynamic precipitation and recrystallization mechanism during hot compression of Mg-Gd-Y-Zr alloy

The hot deformation behavior of an Al-Zn-Mg-Cu alloy was investigated by hot compression test at deformation temperatures varying from 320 to 440 °C with strain rates ranging from 0.01 to 10 s−1. The results show that the Mg(Zn, Cu)2 particles as a result of the sufficient static precipitation prior to hot compression have an influence on flow softening. A constitutive model compensated with strain was developed from the experimental results, and it proved to be accurate for predicting the hot deformation behavior. Processing maps at various strains were established. The microstructural evolution demonstrates that the dominant dynamic softening mechanism stems from dynamic recovery (DRV) and partial dynamic recrystallization (DRX). The recrystallization mechanism is continuous dynamic recrystallization (CDRX). The microstructure observations are in good agreement with the results of processing maps. On account of the processing map and microstructural observation, the optimal hot processing parameters at a strain of 0.6 are at deformation temperature range of 390–440 °C and strain rate range of 0.010–0.316 s−1 with a peak efficiency of 0.390.

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Strain induced transformation, dynamic recrystallization and texture evolution during hot compression of an extruded Mg-Gd-Y-Zn-Zr alloy

Materials Science and Engineering A ◽

10.1016/j.msea.2020.139021 ◽

2020 ◽

Vol 778 ◽

pp. 139021 ◽

Cited By ~ 5

Author(s):

H. Esmaeilpour ◽

A. Zarei-Hanzaki ◽

N. Eftekhari ◽

H.R. Abedi ◽

M.R. Ghandehari Ferdowsi

Keyword(s):

Dynamic Recrystallization ◽

Texture Evolution ◽

Hot Compression ◽

Zr Alloy

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Hot Compression Deformation Behavior and Processing Maps of Mg-Gd-Y-Zr Alloy

Journal of Materials Engineering and Performance ◽

10.1007/s11665-013-0568-1 ◽

2013 ◽

Vol 22 (9) ◽

pp. 2458-2466 ◽

Cited By ~ 15

Author(s):

Bin Chen ◽

Wei-Min Zhou ◽

Song Li ◽

Xiao-Ling Li ◽

Chen Lu

Keyword(s):

Deformation Behavior ◽

Hot Compression ◽

Processing Maps ◽

Hot Compression Deformation ◽

Compression Deformation ◽

Zr Alloy

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Hot compression behavior of the Mg-Gd-Y-Zn-Zr alloy filled with intragranular long-period stacking ordered phases

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2017.07.088 ◽

2017 ◽

Vol 724 ◽

pp. 528-536 ◽

Cited By ~ 26

Author(s):

Xiaojie Zhou ◽

Chuming Liu ◽

Yonghao Gao ◽

Shunong Jiang ◽

Wenhui Liu ◽

...

Keyword(s):

Hot Compression ◽

Compression Behavior ◽

Long Period ◽

Ordered Phases ◽

Zr Alloy

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The effect of nano β-TCP on hot compression deformation behavior and microstructure evolution of the biomedical Mg-Zn-Zr alloy

Materials Science and Engineering A ◽

10.1016/j.msea.2018.01.006 ◽

2018 ◽

Vol 715 ◽

pp. 205-213 ◽

Cited By ~ 8

Author(s):

Haoran Zheng ◽

Zhen Li ◽

Minfang Chen ◽

Chen You ◽

Debao Liu

Keyword(s):

Microstructure Evolution ◽

Deformation Behavior ◽

Hot Compression ◽

Hot Compression Deformation ◽

Compression Deformation ◽

Zr Alloy

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Microstructure and Texture Evolution of Repetitive Upsetting-Extruded (RUEed) Mg-Gd-Y-Zn-Zr Alloy after Hot Compression

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1035.63 ◽

2021 ◽

Vol 1035 ◽

pp. 63-71

Author(s):

Bei Bei Dong ◽

Zhi Min Zhang ◽

Jian Min Yu ◽

Xin Che

Keyword(s):

Volume Fraction ◽

Texture Evolution ◽

Hot Compression ◽

Compression Tests ◽

Texture Intensity ◽

Average Grain Size ◽

Strain Stress ◽

Increasing Temperature ◽

Compression Texture ◽

Zr Alloy

In order to determine the deformation temperature of next pass, the hot compression tests were performed by Gleeble-3800 at different temperature form 380 to 420 °C. The microstructure and texture evolution of repetitive upsetting-extruded (RUEed) Mg-Gd-Y-Zn-Zr alloy during hot compression were studied by electron backscattering diffraction (EBSD) analysis. The results showed that the dynamic recrystallization (DRX) occured during the hot compression processing from the strain-stress flow curves. When the temperature increased to 420 °C, the average grain size reduced to 6.64 μm, and the volume fraction of DRXed grains increased to 81.5%. All the compressed alloys exhibited a typical compression texture, the maximum texture intensity of {0001} plane gradually decreased with increasing temperature. When the compression temperature was up to 420°C, the the maximum texture intensity of {0001} plane was 3.207 due to the effect of DRXed grains. Finally, 420°C is chosen as the next deformation of next pass because of the more precipitation and DRXed grains.

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