Prediction of flow stress for N08028 alloy under hot working conditions

Wang, L.; Liu, F.; Zuo, Qiyang; Chen, C.F.

doi:10.1016/j.matdes.2012.12.074

Cited by 69 publications

(31 citation statements)

References 36 publications

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“…Previous studies have shown that in terms of peak stress, saturation stress ðr sat Þ could be given by the following expression in terms of peak stress [25]:…”

Section: Work Hardening-dynamic Recovery Modelmentioning

confidence: 99%

Hot compression deformation behavior and a modified physically-based constitutive model of Cu-6 %Ag alloy

et al. 2016

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In order to reveal the flow characteristics of Cu-6 %Ag alloy on the condition of hot deformation, the isothermal compression experiments are carried out at the temperatures of 973-1123 K under strain rates of 0.01-10 s -1 . The effects of deformation condition on the hot compression deformation behavior are investigated. The low instability strain (e i ) behavior at high strain rate (10 s -1 ) is discussed in this paper. According to the experiment results and analyses, the deformation twinning and inhomogeneous grains are thought to be the possible reasons for low strain cracking. Then, a modified physically based constitutive model is established. The strain for maximum softening rate ðe Ã Þ is quoted in the constitutive equation which is proved that there is a nearly linear relationship between lne Ã and lnZ. What's more, the correlation coefficient (R) and the average absolute relative error (AARE) are used to evaluate the accuracy of the established constitutive model. The values of R and AARE are 0.99612 and 3.47 %, respectively, which show that the modified constitutive model can exactly reveal the flow stress of Cu-6 %Ag alloy.

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“…Previous studies have shown that in terms of peak stress, saturation stress ðr sat Þ could be given by the following expression in terms of peak stress [25]:…”

Section: Work Hardening-dynamic Recovery Modelmentioning

confidence: 99%

Hot compression deformation behavior and a modified physically-based constitutive model of Cu-6 %Ag alloy

et al. 2016

View full text Add to dashboard Cite

show abstract

“…After the peak stress, the flow stress decreases continuously until arriving to the near steady flow stress. It means that the typical flow curve is composed of three stages [27]: Stage Ⅰ (work hardening and DRV stage), Stage Ⅱ (work hardening, DRV and DRX stage) and Stage Ⅲ…”

Section: Typical True Stressestrain Curvesmentioning

confidence: 99%

Dynamic restoration mechanism and physically based constitutive model of 2050 Al–Li alloy during hot compression

Zhu

Liu

et al. 2015

Journal of Alloys and Compounds

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“…s rec represents the flow stress of metal materials attributable to work-hardening and DRV. The curve marked 'b' represents the true work-hardening, DRV and DRX behavior, and its stage II is considered to be the net result of the simultaneous operation of work-hardening and DRV and DRX [34]. s drx represents the flow stress in the stage II, and the difference (Ds) between s drx and s rec is the net softening directly attributable to DRX [34].…”

Section: Modeling the Physically Based Constitutive Modelmentioning

confidence: 99%

A physically-based constitutive model for high temperature deformation of Cu-0.36Cr-0.03Zr alloy

Ding

et al. 2015

Journal of Alloys and Compounds

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Prediction of flow stress for N08028 alloy under hot working conditions

Cited by 69 publications

References 36 publications

Hot compression deformation behavior and a modified physically-based constitutive model of Cu-6 %Ag alloy

Hot compression deformation behavior and a modified physically-based constitutive model of Cu-6 %Ag alloy

Dynamic restoration mechanism and physically based constitutive model of 2050 Al–Li alloy during hot compression

A physically-based constitutive model for high temperature deformation of Cu-0.36Cr-0.03Zr alloy

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