Constitutive model and processing maps of 7055 aluminum alloy used for fasteners

Zhao, Hui; Ye, Lingying; Cheng, Quanshi; Kang, Yuan; Zhang, Wenjing

doi:10.1016/j.mtcomm.2022.104996

Cited by 3 publications

(3 citation statements)

References 37 publications

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“…It can be observed that at 300 • C/1 s −1 (domain 1), grains of the compressed sample contain a high density of dislocation pile-up and entanglement, as depicted in Figure 11a. Under a low compression temperature, the deformation-induced driving force for the dislocation movement is insufficient, resulting in dislocation pile-up and the formation of dislocation entanglements [33][34][35].…”

Section: Microstructure Examinationmentioning

confidence: 99%

See 1 more Smart Citation

Deformation Behavior and Processing Maps of 7075 Aluminum Alloy under Large-Strain Thermal Compression

Xia,

Ye,

Qiu

et al. 2023

Materials

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The investigation of thermal deformation behavior plays a significant role in guaranteeing the overall performance of alloy materials. In this manuscript, a series of isothermal compression tests at different temperatures (300, 350, 400, and 450 °C) and strain rates (0.001, 0.01, 0.1, and 1 s−1) were conducted to study the thermal deformation behavior of 7075 aluminum alloy. Subsequently, processing maps at a strain from 0.4 to 1.39 were established according to the stress–strain data obtained from various deformation parameters. The microstructural evolution of the target alloy was observed with an optical microscope and transmission electron microscope. The results reveal the unstable regions are located at (360–450 °C, 0.04–1 s−1) and (300–315 °C, 0.01–0.22 s−1). Precipitation particles, pinned dislocations, and highly dislocated areas can be observed in the microstructure of the alloy in the unstable regions. This is a potential crack and defect formation point. The identified optimum processing parameters are located at (375–450 °C, 0.001–0.03 s−1), with a maximum dissipation efficiency of 0.6.

show abstract

Section: Microstructure Examinationmentioning

confidence: 99%

“…mation-induced driving force for the dislocation movement is insufficient, resulting in dislocation pile-up and the formation of dislocation entanglements [33][34][35].…”

Section: Microstructure Examinationmentioning

confidence: 99%

Deformation Behavior and Processing Maps of 7075 Aluminum Alloy under Large-Strain Thermal Compression

Xia,

Ye,

Qiu

et al. 2023

Materials

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“…Tang et al [31] suggested that a high Zn content in Al-Zn-Mg-Cu alloys can promote the dynamic softening during hot deformation by promoting dynamic precipitation. Raja et al [32] reported a wider processing parameter range for Al-7.3Zn-2.2Mg-2Cu under 50% compression. A high recrystallization fraction (73%) microstructure including CDRX and particle-stimulated nucleation (PSN) was obtained at 450 • C and 0.001 s −1 .…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behavior and Microstructural Evolution of a TiB2/Al-Zn-Mg-Cu-Zr Composite

Huang,

Xiang,

et al. 2024

Materials

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In the present work, the hot deformation behavior and microstructural evolution of a TiB2/Al-Zn-Mg-Cu-Zr composite were studied. Hot compression tests were conducted within a temperature range of 370 °C to 490 °C and a strain rate of 0.001 s−1 to 10 s−1. We established the Arrhenius constitutive equation with Zener–Hollomon parameters and processing maps and discussed the microstructural evolution during hot deformation. The results indicated that the safe processing parameter region falls within 370 °C–490 °C and 0.001 s−1–0.025 s−1. The influence of the strain rate on the safe processing range is more dominant than that of deformation temperature, which is primarily attributed to TiB2. Dynamic softening is primarily governed by dynamic recovery (DRV). Small particles (η, Al3Zr) can pin dislocations, promoting the rearrangement and annihilation of dislocations and facilitating DRV. Higher temperatures and lower strain rates facilitated dynamic recrystallization (DRX). Continuous dynamic recrystallization (CDRX) occurs near high-angle grain boundaries induced by strain-induced boundary migration (SIBM). TiB2 and large second-phase particles generate high-density geometrically necessary dislocations (GNBs) during hot deformation, which serve as nucleation sites for discontinuous dynamic recrystallization (DDRX). This enhances dynamic softening and improves formability.

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Characteristics of work hardening and constitutive models comparison of powder metallurgy Al-5.6Zn-2Mg alloy during hot compression

Katika,

Damoda,

Davidson

et al. 2024

J. Cent. South Univ.

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Constitutive model and processing maps of 7055 aluminum alloy used for fasteners

Cited by 3 publications

References 37 publications

Deformation Behavior and Processing Maps of 7075 Aluminum Alloy under Large-Strain Thermal Compression

Deformation Behavior and Processing Maps of 7075 Aluminum Alloy under Large-Strain Thermal Compression

Hot Deformation Behavior and Microstructural Evolution of a TiB2/Al-Zn-Mg-Cu-Zr Composite

Characteristics of work hardening and constitutive models comparison of powder metallurgy Al-5.6Zn-2Mg alloy during hot compression

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