Constitutive modeling for hot deformation behavior of ZA27 alloy

Li, H. Y.; Liu, Y.; Lu, Xiaochao; Su, Xiongjie

doi:10.1007/s10853-012-6427-x

Cited by 18 publications

(9 citation statements)

References 27 publications

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“…The true stress-strain curves of Mg-5Sn-2.5Pb magnesium alloy are presented in Fig.1. A similar phenomenon can be observed in true stress-strain curves of the other alloys [8][9][10][11]. The flow stress increase to a peak at a relatively low strain due to the forming mechanism dominated by work hardening.…”

Section: True Stress-strain Relationshipssupporting

confidence: 76%

Hot Compression Deformation Behavior of the Mg-5Sn-2.5Pb Magnesium Alloy

Xie¹,

Zhu²,

Jin³

2014

Proceedings of the 2015 International Conference on Material Science and Applications

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Compressive deformation behavior of Mg-5Sn-2.5Pb magnesium alloy was investigated at the temperature range from 250 to 450°C , strain rate range from 0.001 to 10s-1 and the maximum deformation degree of 60% on Gleeble-3500 thermal simulator. The constitutive equations were established by taking peak stresses as the function of temperatures and strain rates. The results show that the flow stress significantly affected by deformation temperature and strain rate, and the flow stress decreases with the increase of deformation temperature and the decrease of strain rate. The deformation activation energy and stress exponent were evaluated by the hyperbolic-sine mathematics model and the hot deformation constitutive equation was established.

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Section: True Stress-strain Relationshipssupporting

confidence: 76%

Hot Compression Deformation Behavior of the Mg-5Sn-2.5Pb Magnesium Alloy

Xie¹,

Zhu²,

Jin³

2014

Proceedings of the 2015 International Conference on Material Science and Applications

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“…Due to poor reliability in describing flow behavior in high stress regimes and low temperature regions by employing power law and exponential equations, respectively, [28] hyperbolic sine relation alone (Eq. 4) is considered in the present investigation.…”

Section: Constitutive Modelingmentioning

confidence: 99%

Constitutive modeling for predicting peak stress characteristics during hot deformation of hot isostatically processed nickel-base superalloy

et al. 2015

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Hot flow behavior of hot isostatically processed experimental nickel-based superalloy is investigated over temperature and strain rate ranging from 1000-1200°C and 0.001-1 s -1 , respectively by carrying out constant true strain rate isothermal compression tests up to true strain of 0.69. True stress-true strain curves corrected for adiabatic temperature rise exhibited rapid strain hardening followed by flow softening behavior irrespective of temperature and strain rate regimes investigated, although anomalous flow behavior is observed at 1200°C. Variation of peak flow stress with temperature is corroborated to the microstructural changes pertaining to the morphology and relative volume fraction of the phases present. From the experimental results, constitutive model incorporating the effects of strain rate, strain, and temperature is established to describe the hot flow behavior of investigated alloy. Dependence of peak flow stress on strain rate and temperature described by Zener-Hollomon (Z) parameter indicated increase in peak flow stress with Z. Additionally Cingara-Queen equation is employed to predict flow curve up to peak stress. The reliability of developed constitutive models is validated statistically and the results indicate reasonable agreement with experimental findings.

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“…During the whole unidirectional thermal compression process, the value of flow stress was influenced by the process of work hardening and dynamic recrystallization. It was not a linear control of individual factors, so the Arrhenius equation was introduced to express flow stress behavior of alloy samples [ 23 , 24 , 25 ]:

where

is the strain rate (s −1 ), σ (MPa) is the flow stress, T (K) is the absolute temperature, Q (KJ·mol −1 ) is the deformation activation energy, R (8.314 J·mol −1 ·K −1 ) is the gas constant.…”

Section: Resultsmentioning

confidence: 99%

Microstructure, Hot Deformation Behavior, and Recrystallization Behavior of Zn-1Fe-1Mg Alloy under Isothermal Compression

Xue

et al. 2021

Materials

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Nowadays, wrought zinc-based biodegradable alloys are favored by researchers, due to their excellent mechanical properties and suitable degradation rates. However, there are few research studies on their thermal deformation behavior at present. This study took Zn-1Fe-1Mg and explored its microstructural change, deformation, recrystallization behavior and processing map by means of the thermal simulation experiment, at temperatures ranging from 235 °C to 340 °C and strain rates ranging from 10−2 s−1 to 10 s−1. The constitutive model was constructed using the Arrhenius formula. The results indicated that the evolution of microstructure included the dynamic recrystallization (DRX) of the Zn matrix, the spheroidization of the Mg2Zn11 phase, and breaking of the FeZn13 phase. The subgrains observed within the deformed grain resulted mainly from continuous dynamic recrystallization (CDRX). The precipitated FeZn13 grains overlapped with the precipitated MgZn2 from the matrix, thus forming a spine-like structure at the phase interface. After compression, the alloy possessed a strong basal texture. Affected by the change of Zn twins, textural strength decreased at first and then increased as the deformation temperature rose. There was only a small unstable region in the processing map, indicating that the alloy exhibited good machinability.

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Constitutive modeling for hot deformation behavior of ZA27 alloy

Cited by 18 publications

References 27 publications

Hot Compression Deformation Behavior of the Mg-5Sn-2.5Pb Magnesium Alloy

Hot Compression Deformation Behavior of the Mg-5Sn-2.5Pb Magnesium Alloy

Constitutive modeling for predicting peak stress characteristics during hot deformation of hot isostatically processed nickel-base superalloy

Microstructure, Hot Deformation Behavior, and Recrystallization Behavior of Zn-1Fe-1Mg Alloy under Isothermal Compression

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