Constitutive modeling of hot deformation behavior of H62 brass

Xiao, Yanhong; Guo, Cheng; Guo, Xiaoyan

doi:10.1016/j.msea.2011.04.090

Cited by 87 publications

(34 citation statements)

References 24 publications

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“…An analysis of the peak ow stress data presented by Xiao et al [12] in their investigation of the hot workability of a Cu38%Zn shows that, in this α−β brass, the stress exponent is slightly lower than in Cu30%Zn (n =3.9), while the activation energy is substantially higher (Q =257 kJ/mol). Similar values (n =3.9, Q =222 kJ/mol) can be obtained by tting the data presented by Padmavardhani and Prasad [13] for a Zn39.5%Zn3%Pb brass.…”

Section: Introductionmentioning

confidence: 93%

Characterization of Hot Deformation of CW602N Brass

2015

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Alpha brasses (in principle single-phase solid solution alloys containing less than 35% Zn) are usually processed by extrusion, forging or rolling. Although these materials are of widespread use, few detailed studies of the ow behavior of brass at high temperature are available. The hot workability of a CW602N brass (Cu36.5%Zn2%Pb) was thus investigated by torsion testing in the temperature range between 550 and 800• C, under equivalent strain rates ranging from 0.01 to 10 s −1 . The peak ow stress dependence on temperature and strain rate was described by the well-known Garofalo equation, with a stress exponent close to 4 and Q =220 kJ mol −1 . A considerably larger scatter of the experimental data was observed in the high temperature range. The detailed microstructural analysis of the deformed samples by scanning electron microscopy revealed substantial dierences among the samples deformed in the low temperature regime and those torsioned at 750 and 800• C. These dierences were analyzed and discussed to rationalize the dierent mechanical responses observed in the two hot-deformation regimes.

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Section: Introductionmentioning

confidence: 93%

Characterization of Hot Deformation of CW602N Brass

2015

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“…However, influence of strain on material constants is significant 9,10,23 . Hence, in order to accurately predict the flow behavior of 3Cr20Ni10W2 alloy, it is necessary to establish the constitutive equation compensated of strain into account.…”

Section: Constitutive Equations Compensated For Strainmentioning

confidence: 99%

The flow behavior modeling of as-extruded 3Cr20Ni10W2 austenitic heat-resistant alloy at elevated temperatures considering the effect of strain

Quan

Mao

et al. 2014

Mat. Res.

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In order to investigate the compressive deformation behavior of 3Cr20Ni10W2 alloy, a series of isothermal upsetting experiments were carried out in the temperature range of 1203-1403 K and strain rate range of 0.01-10 s -1 on a Gleeble-1500 thermo-mechanical simulator. The results indicate that the flow stress initially increases to a peak value and then decreases gradually to a steady state. The characteristics of the curves are determined by the interaction of work hardening (WH), dynamic recovery (DRV) and dynamic recrystallization (DRX). The flow stress decreases with increasing temperature and decreasing strain rate. The relationship between microstructure and processing parameters is discussed to give an insight into the hot deformation behavior of 3Cr20Ni10W2 alloy. Then, by regression analysis for constitutive equation, material constants (n, α, β, A and Q) were calculated for the peak stress. Further, the constitutive equation along the flow curve was developed by utilizing an eighth order polynomial of strain for variable coefficients (including n, α, Α and Q). The validity of the developed constitutive equation incorporating the influence of strain was verified through comparing the experimental and predicted data by using standard statistical parameters such as correlation coefficient (R) and average absolute relative error (AARE) that are 0.995 and 4.08% respectively.

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“…It has been recently shown that the deformation activation energy and material constants are strongly influenced by the strain [14][15][16][17][18] . Therefore, compensation of strain may have a significant effect on the accuracy of the flow stress prediction and should be taken into account in order to derive the proper constitutive equations.…”

Section: Compensation Of Strainmentioning

confidence: 99%

“…Slooff et al 12 have noted that a straindependent parameter should be incorporated to correct the constitutive behavior. Some investigations have established the constitutive equations for various metals and alloys such as 9Cr-1Mo (P91) steel 13 , aluminum alloys [14][15][16] , V150 grade oil casing steel 17 , H62 brass alloy 18 incorporating the effect of the strain. However it has not well documented in case of magnesium alloys yet.…”

Section: Introductionmentioning

confidence: 99%

Compressive deformation behavior modeling of AZ31 magnesium alloy at elevated temperature considering the strain effect

et al. 2013

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The true stress-strain data from isothermal hot compression tests, in the temperature range of 300-500 °C and strain rate of 0.001-0.1s -1, were employed to study the flow behavior of AZ31 and to develop constitutive equation based on an Arrhenius-type equation. The flow stress increases with the decrease of deformation temperature and the increase of strain rate, which can be represented by Zener-Hollomon parameter in an exponential equation. The influence of strain was incorporated in the developed constitutive equation by considering the effect of strain on material constants. The results show that the proposed constitutive equations give a precise estimate for high temperature flow stress AZ31 alloy, which means it can be used for numerical simulation of hot deformation process and for choosing proper deformation parameter in engineering practice accurately.

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Constitutive modeling of hot deformation behavior of H62 brass

Cited by 87 publications

References 24 publications

Characterization of Hot Deformation of CW602N Brass

Characterization of Hot Deformation of CW602N Brass

The flow behavior modeling of as-extruded 3Cr20Ni10W2 austenitic heat-resistant alloy at elevated temperatures considering the effect of strain

Compressive deformation behavior modeling of AZ31 magnesium alloy at elevated temperature considering the strain effect

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