Hot compression behaviors and microstructural evolution of high-Mg crossover Al–Mg–Zn based alloys

Chun Guo; Mengzhuo Fan; Jinyue Li; Yang Li; Feng Qian; Shiwei Pan; Hongwei Yan; Xiwu Li; Xingwang Cheng

doi:10.1016/j.jallcom.2025.181741

Hot compression behaviors and microstructural evolution of high-Mg crossover Al–Mg–Zn based alloys

Chun Guo
, Mengzhuo Fan
, Jinyue Li
, Yang Li
, Feng Qian^*
, Shiwei Pan
, Hongwei Yan
, Xiwu Li
, Xingwang Cheng

^*此作品的通讯作者

Beijing Institute of Technology
Shanghai Aerospace Electronic Technology Institute
General Research Institute for Non-ferrous Metals China
GRIMAT Engineering Institute Co., Ltd.

科研成果: 期刊稿件 › 文章 › 同行评审

4 引用（Scopus）

摘要

Newly developed high-Mg crossover Al–Mg–Zn-based alloys offer low density, excellent mechanical properties and high corrosion resistance. However, as wrought Al alloys, the industrial application of Al–Mg–Zn alloys faces challenges due to their complex hot deformation behaviors, which result from the increased Mg content (∼7%) and the dynamic precipitation of the T- [Figure presented] phase during hot deformation. This work investigates the hot deformation behaviors of a novel high-Mg crossover Al–Mg–Zn based alloy through hot compression tests conducted at different deformation temperatures (320–420 °C) and strain rates (0.001–10 s⁻¹). A constituve model is developed and hot processing maps are established to predict deformation behaviors. Three distinct regions are identified in the processing map: the optimal processing region (360–410 °C/0.001–0.01 s⁻¹) with the highest energy dissipation factor (>55%), the practical processing region (392–420 °C/0.01–0.13 s⁻¹) characterized by moderately high strain rates and the flow instability region (320–420 °C/0.13–10 s⁻¹, 360–385 °C/0.02–0.13 s⁻¹). Microstructural analysis reveals that the dynamic softening mechanisms are primarily governed by dynamic recovery and continuous dynamic recrystallization, with partial discontinuous dynamic recrystallization. Another key finding is the significant role of the T- [Figure presented] phase, which dynamically precipitates during hot deformation. At low strain rates (0.001 s⁻¹), it remains finely dispersed (20.0 ± 2.1 nm), whereas at high strain rates (10 s⁻¹), severe coarsening occurs (244.7 ± 24.7 nm), inhibiting dynamic softening, leading to localized flow instability and reducing hot workability. This study provides insights into the hot deformation mechanisms of high-Mg Al–Mg–Zn based alloys.

源语言	英语
文章编号	181741
期刊	Journal of Alloys and Compounds
卷	1036
DOI	https://doi.org/10.1016/j.jallcom.2025.181741
出版状态	已出版 - 20 7月 2025

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@article{7ad3259ac7df42549b49cd8832018c6c,

title = "Hot compression behaviors and microstructural evolution of high-Mg crossover Al–Mg–Zn based alloys",

abstract = "Newly developed high-Mg crossover Al–Mg–Zn-based alloys offer low density, excellent mechanical properties and high corrosion resistance. However, as wrought Al alloys, the industrial application of Al–Mg–Zn alloys faces challenges due to their complex hot deformation behaviors, which result from the increased Mg content (∼7\%) and the dynamic precipitation of the T- [Figure presented] phase during hot deformation. This work investigates the hot deformation behaviors of a novel high-Mg crossover Al–Mg–Zn based alloy through hot compression tests conducted at different deformation temperatures (320–420 °C) and strain rates (0.001–10 s−1). A constituve model is developed and hot processing maps are established to predict deformation behaviors. Three distinct regions are identified in the processing map: the optimal processing region (360–410 °C/0.001–0.01 s−1) with the highest energy dissipation factor (>55\%), the practical processing region (392–420 °C/0.01–0.13 s−1) characterized by moderately high strain rates and the flow instability region (320–420 °C/0.13–10 s−1, 360–385 °C/0.02–0.13 s−1). Microstructural analysis reveals that the dynamic softening mechanisms are primarily governed by dynamic recovery and continuous dynamic recrystallization, with partial discontinuous dynamic recrystallization. Another key finding is the significant role of the T- [Figure presented] phase, which dynamically precipitates during hot deformation. At low strain rates (0.001 s−1), it remains finely dispersed (20.0 ± 2.1 nm), whereas at high strain rates (10 s−1), severe coarsening occurs (244.7 ± 24.7 nm), inhibiting dynamic softening, leading to localized flow instability and reducing hot workability. This study provides insights into the hot deformation mechanisms of high-Mg Al–Mg–Zn based alloys.",

keywords = "Al–Mg–Zn alloy, Constitutive model, Deformation behavior, Hot processing map, Microstructure evolution",

author = "Chun Guo and Mengzhuo Fan and Jinyue Li and Yang Li and Feng Qian and Shiwei Pan and Hongwei Yan and Xiwu Li and Xingwang Cheng",

note = "Publisher Copyright: {\textcopyright} 2025 Elsevier B.V.",

year = "2025",

month = jul,

day = "20",

doi = "10.1016/j.jallcom.2025.181741",

language = "English",

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journal = "Journal of Alloys and Compounds",

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TY - JOUR

T1 - Hot compression behaviors and microstructural evolution of high-Mg crossover Al–Mg–Zn based alloys

AU - Guo, Chun

AU - Fan, Mengzhuo

AU - Li, Jinyue

AU - Li, Yang

AU - Qian, Feng

AU - Pan, Shiwei

AU - Yan, Hongwei

AU - Li, Xiwu

AU - Cheng, Xingwang

PY - 2025/7/20

Y1 - 2025/7/20

N2 - Newly developed high-Mg crossover Al–Mg–Zn-based alloys offer low density, excellent mechanical properties and high corrosion resistance. However, as wrought Al alloys, the industrial application of Al–Mg–Zn alloys faces challenges due to their complex hot deformation behaviors, which result from the increased Mg content (∼7%) and the dynamic precipitation of the T- [Figure presented] phase during hot deformation. This work investigates the hot deformation behaviors of a novel high-Mg crossover Al–Mg–Zn based alloy through hot compression tests conducted at different deformation temperatures (320–420 °C) and strain rates (0.001–10 s−1). A constituve model is developed and hot processing maps are established to predict deformation behaviors. Three distinct regions are identified in the processing map: the optimal processing region (360–410 °C/0.001–0.01 s−1) with the highest energy dissipation factor (>55%), the practical processing region (392–420 °C/0.01–0.13 s−1) characterized by moderately high strain rates and the flow instability region (320–420 °C/0.13–10 s−1, 360–385 °C/0.02–0.13 s−1). Microstructural analysis reveals that the dynamic softening mechanisms are primarily governed by dynamic recovery and continuous dynamic recrystallization, with partial discontinuous dynamic recrystallization. Another key finding is the significant role of the T- [Figure presented] phase, which dynamically precipitates during hot deformation. At low strain rates (0.001 s−1), it remains finely dispersed (20.0 ± 2.1 nm), whereas at high strain rates (10 s−1), severe coarsening occurs (244.7 ± 24.7 nm), inhibiting dynamic softening, leading to localized flow instability and reducing hot workability. This study provides insights into the hot deformation mechanisms of high-Mg Al–Mg–Zn based alloys.

AB - Newly developed high-Mg crossover Al–Mg–Zn-based alloys offer low density, excellent mechanical properties and high corrosion resistance. However, as wrought Al alloys, the industrial application of Al–Mg–Zn alloys faces challenges due to their complex hot deformation behaviors, which result from the increased Mg content (∼7%) and the dynamic precipitation of the T- [Figure presented] phase during hot deformation. This work investigates the hot deformation behaviors of a novel high-Mg crossover Al–Mg–Zn based alloy through hot compression tests conducted at different deformation temperatures (320–420 °C) and strain rates (0.001–10 s−1). A constituve model is developed and hot processing maps are established to predict deformation behaviors. Three distinct regions are identified in the processing map: the optimal processing region (360–410 °C/0.001–0.01 s−1) with the highest energy dissipation factor (>55%), the practical processing region (392–420 °C/0.01–0.13 s−1) characterized by moderately high strain rates and the flow instability region (320–420 °C/0.13–10 s−1, 360–385 °C/0.02–0.13 s−1). Microstructural analysis reveals that the dynamic softening mechanisms are primarily governed by dynamic recovery and continuous dynamic recrystallization, with partial discontinuous dynamic recrystallization. Another key finding is the significant role of the T- [Figure presented] phase, which dynamically precipitates during hot deformation. At low strain rates (0.001 s−1), it remains finely dispersed (20.0 ± 2.1 nm), whereas at high strain rates (10 s−1), severe coarsening occurs (244.7 ± 24.7 nm), inhibiting dynamic softening, leading to localized flow instability and reducing hot workability. This study provides insights into the hot deformation mechanisms of high-Mg Al–Mg–Zn based alloys.

KW - Al–Mg–Zn alloy

KW - Constitutive model

KW - Deformation behavior

KW - Hot processing map

KW - Microstructure evolution

UR - https://www.scopus.com/pages/publications/105009696413

U2 - 10.1016/j.jallcom.2025.181741

DO - 10.1016/j.jallcom.2025.181741

M3 - Article

AN - SCOPUS:105009696413

SN - 0925-8388

VL - 1036

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 181741

ER -

Hot compression behaviors and microstructural evolution of high-Mg crossover Al–Mg–Zn based alloys

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