Microstructure and micro-texture evolution during large strain deformation of aluminium alloy AA 2219

Murty, S. V. S. Narayana; Sarkar, A.; Narayanan, P. Ramesh; Venkitakrishnan, P. V.; Mukhopadhyay, J.

doi:10.1016/j.msea.2016.09.027

Cited by 41 publications

(10 citation statements)

References 31 publications

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“…Deformation temperature and strain rate are important factors controlling the hot deformation flow stress. The hyperbolic sinusoidal constitutive equation in the Arrhenius model has been widely used to describe the complex relationships among flow stress, heat distortion temperature, and strain rate [8][9][10][11][12][13][14][15][16][17][18][19]27]. Sellars and McTegart proposed the use of a hyperbolic sine function including the thermal deformation activation energy Q and temperature T to describe the thermal activation behavior of the material.…”

Section: Constitutive Equationsmentioning

confidence: 99%

“…According to Equations (9) and (11), the activation energies obtained under various deformation conditions are shown in Table 3.…”

Section: Constitutive Equationsmentioning

confidence: 99%

“…Thus, it is necessary to understand the influence of deformation parameters on hot deformation behavior and microstructure in this Al-Mn-Sc alloy. In general, the isothermal compression test is an appropriate method to study the hot deformation characteristics of materials [8,9]. The relationships among the flow stress, strain, strain rate, and deformation temperature can be used to establish the hot deformation constitutive equation, and its hot activation energy can be calculated.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the hot processing map is constructed to predict the plastic deformation mechanism and the unstable deformation domain in various deformation conditions, which provides insights into the optimization of thermo-mechanical processing. This method has been widely used in various alloys, such as Al alloys [8][9][10], Mg alloys [11][12][13], Ti alloys [14][15][16], and steel [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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Hot Deformation Behavior of a New Al–Mn–Sc Alloy

et al. 2019

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The hot deformation behavior of a new Al–Mn–Sc alloy was investigated by hot compression conducted at temperatures from 330 to 490 °C and strain rates from 0.01 to 10 s−1. The hot deformation behavior and microstructure of the alloy were significantly affected by the deformation temperatures and strain rates. The peak flow stress decreased with increasing deformation temperatures and decreasing strain rates. According to the hot deformation behavior, the constitutive equation was established to describe the steady flow stress, and a hot processing map at 0.4 strain was obtained based on the dynamic material model and the Prasad instability standard, which can be used to evaluate the hot workability of the alloy. The developed hot processing diagram showed that the instability was more likely to occur in the higher Zener–Hollomon parameter region, and the optimal processing range was determined as 420–475 °C and 0.01–0.022 s−1, in which a stable flow and a higher power dissipation were achieved.

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Section: Constitutive Equationsmentioning

confidence: 99%

“…According to Equations (9) and (11), the activation energies obtained under various deformation conditions are shown in Table 3.…”

Section: Constitutive Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hot Deformation Behavior of a New Al–Mn–Sc Alloy

et al. 2019

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“…[ 5–7 ] During the manufacture of these parts, the forming parameters greatly affect the microstructures and properties. [ 8,9 ] Therefore, it is essential to research the flow behavior and microstructure evolution of Al–Cu alloys in forming process.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Softening Mechanism and an Improved Unified Constitutive Model for an Al–Cu–Mn–Fe–Zr Alloy during Warm Deformation

et al. 2021

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Deformation behavior of an Al–Cu–Mn–Fe–Zr alloy is investigated by plane strain compression tests at a warm deformation region. The flow stress first increases and then keeps steady, and the flow stress increases with reducing temperature or raising strain rate. However, the influence of strain rate on flow stress is weak at 100 and 150 °C. The dynamic recovery (DRV) mechanism is the dominant mechanism to balance the work hardening, and a larger number of dislocations are consumed at low strain rates. So, the deformed grains are difficult to reach the critical strain for dynamic recrystallization (DRX). When the strain rate is relatively high, the critical strain can be reached in a short time, which promotes the process of DRX. In addition, an improved unified constitutive model is built based on the evolution of dislocation density. The predicted flow stresses are in a close agreement with the measured results, proving that the built model can nicely reproduce the flow behavior.

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Mechanical Behavior and Microstructure Evolution during Hot Torsion Deformation of Aluminum Alloy AA2219

Gilmore

Liu

2022

Adv Eng Mater

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This study comprehensively analyzes the mechanical behavior and microstructural evolution of aluminum alloy AA2219-T87 undergoing high deformation and strain rates at elevated temperatures via hot torsion tests. An integrated experimental and modeling approach is employed, where a finite element model (FEM) is developed with ABAQUS to address local deformation and nonuniform temperature distribution along the specimen gauge section. A Johnson-Cook constitutive material model is calibrated based on the calculated and measured torque curves at different conditions. The grain structure distribution is characterized through optical microscopy and electron backscatter diffraction (EBSD) analysis. Combined with the ABAQUS calculated local thermomechanical conditions, microstructure modeling, using established literature-based equations, is established to provide insights into grain size distribution and recrystallization mechanisms. The calibrated material constitutive model, recrystallization model, and grain size model can be utilized to model various manufacturing processes, which involve hot deformation of aluminum alloys in the intermediate strain rate range of 14-78 s À1 . The constitutive model shows adequate matching of the experimental torque curves at 400, 450, and 500 °C. The recrystallization prediction model functions at over 94% accuracy and the grain size model provides an average deviation between predicted and measured grain size reduction of 11.5%.

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Microstructure and micro-texture evolution during large strain deformation of aluminium alloy AA 2219

Cited by 41 publications

References 31 publications

Hot Deformation Behavior of a New Al–Mn–Sc Alloy

Hot Deformation Behavior of a New Al–Mn–Sc Alloy

Dynamic Softening Mechanism and an Improved Unified Constitutive Model for an Al–Cu–Mn–Fe–Zr Alloy during Warm Deformation

Mechanical Behavior and Microstructure Evolution during Hot Torsion Deformation of Aluminum Alloy AA2219

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