Hot Deformation Behavior and Dynamic Recrystallization Model of 6082 Aluminum Alloy in High Temperature

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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Hot Deformation Behavior and Processing Maps of AA7085 Aluminum Alloy

Rare Metal Materials and Engineering ◽

10.1016/s1875-5372(18)30080-8 ◽

2018 ◽

Vol 47 (2) ◽

pp. 409-415 ◽

Cited By ~ 3

Author(s):

Yang Qunying ◽

Liu Wenyi ◽

Zhang Zhiqing ◽

Huang Guangjie ◽

Liu Xiaoyong

Keyword(s):

Aluminum Alloy ◽

Hot Deformation ◽

Deformation Behavior ◽

Processing Maps ◽

Hot Deformation Behavior

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Hot Deformation Behavior and Dynamic Recrystallization Characteristics of 12Cr Ultra-Super-Critical Rotor Steel

Metals and Materials International ◽

10.1007/s12540-019-00253-y ◽

2019 ◽

Vol 25 (4) ◽

pp. 823-837 ◽

Cited By ~ 9

Author(s):

Y. Xu ◽

J. S. Liu ◽

Y. X. Jiao

Keyword(s):

Dynamic Recrystallization ◽

Hot Deformation ◽

Deformation Behavior ◽

Rotor Steel ◽

Hot Deformation Behavior

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Hot deformation behavior and microstructural evolution of Ag-containing 2519 aluminum alloy

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2009.10.061 ◽

2010 ◽

Vol 31 (4) ◽

pp. 2171-2176 ◽

Cited By ~ 33

Author(s):

Huizhong Li ◽

Zhou Li ◽

Min Song ◽

Xiaopeng Liang ◽

Feifei Guo

Keyword(s):

Aluminum Alloy ◽

Microstructural Evolution ◽

Hot Deformation ◽

Deformation Behavior ◽

Hot Deformation Behavior

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Hot deformation behavior of Mg-8Li-3Al-2Zn-0.2Zr alloy based on constitutive analysis, dynamic recrystallization kinetics, and processing map

Mechanics of Materials ◽

10.1016/j.mechmat.2019.02.005 ◽

2019 ◽

Vol 131 ◽

pp. 158-168 ◽

Cited By ~ 9

Author(s):

Yuehua Sun ◽

Richu Wang ◽

Jian Ren ◽

Chaoqun Peng ◽

Yan Feng

Keyword(s):

Dynamic Recrystallization ◽

Hot Deformation ◽

Deformation Behavior ◽

Processing Map ◽

Hot Deformation Behavior ◽

Recrystallization Kinetics ◽

Constitutive Analysis

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Hot Deformation Behavior of Cu–Sn–La Polycrystalline Alloy Prepared by Upcasting

Materials ◽

10.3390/ma13173739 ◽

2020 ◽

Vol 13 (17) ◽

pp. 3739

Author(s):

Siming Hua ◽

Pingze Zhang ◽

Zili Liu ◽

Lin Yang

Keyword(s):

Dynamic Recrystallization ◽

Hot Deformation ◽

Deformation Behavior ◽

Testing Machine ◽

Shear Bands ◽

Strain Curve ◽

Extrusion Process ◽

Hot Deformation Behavior ◽

Polycrystalline Alloy ◽

Promising Application

In this study, the hot deformation of a Cu–0.55Sn–0.08La (wt.%) alloy was studied using a Gleeble-3180 testing machine at deformation temperatures of 400–700 °C and various strain rates. The stress–strain curve showed that the hot deformation behavior of the Cu–0.55Sn–0.08La (wt.%) alloy was significantly affected by work hardening, dynamic recovery, and dynamic recrystallization. The activation energy Q was 261.649 kJ·mol−1 and hot compression constitutive equation was determined as ε˙=[sinh(0.00651σ)]10.2378·exp(33.6656−261.649RT). The microstructural evolution of the alloy during deformation at 400 °C revealed the presence of both slip and shear bands in the grains. At 700 °C, dynamic recrystallization grains were observed, but recrystallization was incomplete. In summary, these results provide the theoretical basis for the continuous extrusion process of alloys with promising application prospects in the future.

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