Hot deformation behavior and processing map development of cryorolled AA6063 alloy under compression and tension

Bembalge, O.B.; Panigrahi, S. K.

doi:10.1016/j.ijmecsci.2020.106100

Cited by 48 publications

(23 citation statements)

References 40 publications

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“…An Arrhenius-type equation was used to characterize the relationship between the hot-deformation parameters [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ], as follows:

where

was the strain rate (s −1 ),

was the flow stress (MPa), Q was the apparent deformation-activation energy (kJ/mol),

was the deformation temperature (K),

was the gas constant (R = 8.314 J/mol K), and A,

were material constants. In addition,

.…”

Section: Resultsmentioning

confidence: 99%

“…Hence, a suitable constitutive model should consider the coupling effects of multiple factors simultaneously. As an improved form of the hyperbolic sinusoidal Arrhenius model, the strain-compensated Arrhenius equation can meet the above requirements and has been diffusely used in studies of thermal deformation of metal materials (e.g., magnesium alloy [ 23 , 24 ], aluminum alloy [ 25 , 26 ], titanium alloy [ 27 , 28 ], etc.). For example, Hu et al [ 29 ] constructed the strain-compensated Arrhenius constitutive model for Mg-8.5Gd-4.5Y-0.8Zn-0.4Zr alloy.…”

Section: Introductionmentioning

confidence: 99%

“…The dynamic material model (DMM) of Prasad based on processing maps is a powerful tool for optimizing thermal processing and controlling the microstructure of a variety of alloys [ 23 , 25 , 26 , 27 ]. For instance, Xia et al [ 23 ] investigated the hot workability of Mg-6.85Gd-4.52Y-1.15Nd-0.55Zr alloy by compression tests and established processing maps.…”

Section: Introductionmentioning

confidence: 99%

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Hot Deformation Behavior, Processing Maps and Microstructural Evolution of the Mg-2.5Nd-0.5Zn-0.5Zr Alloy

Wang

Yang

et al. 2022

Materials

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Isothermal hot compression experiments were conducted on Mg-2.5Nd-0.5Zn-0.5Zr alloy to investigate hot deformation behavior at the temperature range of 573–773K and the strain rate range of 0.001s−1–10s−1 using a Gleeble-3500D thermomechanical simulator. The results showed that the rheological curve showed a typical work hardening stage, and there were three different stages: work hardening, transition and steady state. A strain compensation constitutive model was established to predict the flow stress of the Mg-2.5Nd-0.5Zn-0.5Zr alloy, and the results proved that it had high predictability. The main deformation mechanism of the Mg-2.5Nd-0.5Zn-0.5Zr alloy was dislocation climbing. The processing maps were established to distinguish the unstable region from the working region. The maps showed that the instability generally occurred at high strain rates and low temperatures, and the common forms of instability were cracking and flow localization. The optimum machining range of the alloy was determined to be 592–773K and 0.001–0.217 s−1. With the increase in deformation temperature, the grain size of the alloy grew slowly at the 573–673K temperature range and rapidly at the 673–773K temperature range.

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“…An Arrhenius-type equation was used to characterize the relationship between the hot-deformation parameters [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ], as follows:

where

was the strain rate (s −1 ),

was the flow stress (MPa), Q was the apparent deformation-activation energy (kJ/mol),

was the deformation temperature (K),

was the gas constant (R = 8.314 J/mol K), and A,

were material constants. In addition,

.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hot Deformation Behavior, Processing Maps and Microstructural Evolution of the Mg-2.5Nd-0.5Zn-0.5Zr Alloy

Wang

Yang

et al. 2022

Materials

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“…However, this simplification has been shown to lead to inaccurate results [24]. The calculation of hot deformation activation energy from experimental values by solving the sinushyperbolic Equation ( 7) is a proven method that has been successfully applied to several types of materials, e.g., steels [4,5,24,37,40], alloys based on copper [25], aluminum [26,56], magnesium [24,52] or nickel [2,57,58].…”

Section: Calculation Methodsmentioning

confidence: 99%

Hot Deformation Behavior of Non-Alloyed Carbon Steels

et al. 2022

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The hot deformation behavior of selected non-alloyed carbon steels was investigated by isothermal continuous uniaxial compression tests. Based on the analysis of experimentally determined flow stress curves, material constants suitable for predicting peak flow stress σp, peak strain εp and critical strain εcrDRX necessary to induce dynamic recrystallization and the corresponding critical flow stresses σcrDRX were determined. The validity of the predicted critical strains εcrDRX was then experimentally verified. Fine dynamically recrystallized grains, which formed at the boundaries of the original austenitic grains, were detected in the microstructure of additionally deformed specimens from low-carbon investigated steels. Furthermore, equations describing with perfect accuracy a simple linear dependence of the critical strain εcrDRX on peak strain εp were derived for all investigated steels. The determined hot deformation activation energy Q decreased with increasing carbon content (also with increasing carbon equivalent value) in all investigated steels. A logarithmic equation described this dependency with reasonable accuracy. Individual flow stress curves of the investigated steels were mathematically described using the Cingara and McQueen model, while the predicted flow stresses showed excellent accuracy, especially in the strains ranging from 0 to εp.

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“…Such two processes are the main stages of aluminum alloy production and heat treatment, which form the microstructure of the products. Hot deformation behavior plays an important role in investigations and the development of novel aluminum alloys [1][2][3][4][5][6][7]. Hot deformation can significantly improve the microstructure of as-cast materials due to decreasing the porosity, the size of the crystallization origin particles, and the grain size.…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behavior of Novel Al-Cu-Y(Er)-Mg-Mn-Zr Alloys

Хомутов

Амер

Barkov

et al. 2021

Metals

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The compression tests in a temperature range of 400–540 °C and strain rates of 0.1–15 s−1 were applied to novel Al-Cu-Y(Er)-Mg-Mn-Zr alloys to investigate their hot deformation behavior. The higher volume fraction of the intermetallic particles with a size of 0.5–4 µm in the alloys caused an increase in flow stress. Hyperbolic sine law constitutive models were constructed for the hot deformation behavior of Al-Cu-Y(Er)-Mg-Mn-Zr alloys. Effective activation energy has a higher value in the alloys with Er than in the alloys with Y. According to the processing maps, the temperature range of 420–480 °C and strain rates higher than 5 s−1 are the most unfavorable region for hot deformation for the investigated alloys. The deformation at 440 °C and 15 s−1 led to cracks on the surface of the sample. However, internal cracks were not observed in the microstructure after deformation. The optimum hot deformation temperatures were in a range of 500–540 °C and at strain rates of 0.1–15 s−1.

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Hot deformation behavior and processing map development of cryorolled AA6063 alloy under compression and tension

Cited by 48 publications

References 40 publications

Hot Deformation Behavior, Processing Maps and Microstructural Evolution of the Mg-2.5Nd-0.5Zn-0.5Zr Alloy

Hot Deformation Behavior, Processing Maps and Microstructural Evolution of the Mg-2.5Nd-0.5Zn-0.5Zr Alloy

Hot Deformation Behavior of Non-Alloyed Carbon Steels

Hot Deformation Behavior of Novel Al-Cu-Y(Er)-Mg-Mn-Zr Alloys

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