Modeling the flow behavior of a medium carbon microalloyed steel under hot working conditions

Cabrera, José‐María; Omar, A. Al; Prado, J. M.; Jonas, John J.

doi:10.1007/s11661-997-0181-8

Cited by 177 publications

(116 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Thus, the flow curve should be capable of describing its acute drop due to dynamic recrystallization as well as dynamic recovery and work hardening. Many kinds of flow curves were proposed through experimental investigations (Ludwik,15) Hollmon, 16) Swift 17) and Voce 18) ) and analytical investigations [19][20][21][22][23][24][25][26] such as that proposed by Estrin and Mecking. 19) Some of them could be used as the flow curves of hot metal under dynamic recrystallization.…”

Section: Introductionmentioning

confidence: 99%

“…19) Some of them could be used as the flow curves of hot metal under dynamic recrystallization. 6,[24][25][26] Unfortunately, as most of the flow curves of metal under dynamic recrystallization are based on those for steady-state creep deformation, they can't be easily implemented in the FE analysis of metal forming, where the Swift-type regression form of the flow curve [15][16][17] is desirable. Also, generally lacking is the physical meaning of the coefficients in flow curve formulation to describe a complex change in flow stress due to work-hardening, dynamic recovery and dynamic recrystallization.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Flow Curve Determination for Metal under Dynamic Recrystallization Using Inverse Analysis

Yanagida

Liu

2003

Mater. Trans.

View full text Add to dashboard Cite

A new method for determining flow curves of hot metal under dynamic recrystallization is proposed in this paper. Thermomechanical finite element analysis of a tool and a workpiece under hot compression is used to evaluate the upsetting force obtained by an experiment, as a function of the distributed flow stress of the workpiece. In order to compensate the effect of inhomogeneous distributions of deformation and temperature on the flow curve, inverse analysis for calculating coefficients in a flow stress curve under dynamic recrystallization is coupled with the thermomechanical finite element analysis. The discrepancy in upsetting force between the experiment and thermomechanical finite element analysis is used as an error estimator in the inverse analysis. A new regression formula of the flow curve, which includes four independent parameters, is introduced. It can express the flow curve of hot metal under dynamic recrystallization as well as dynamic recovery and work hardening. Also, four independent parameters included in the proposed formula have clear physical meanings. The proposed method is applied to the hot compression test of plain carbon steel at elevated temperatures. Flow curves are successfully determined for diversified conditions of strain rate and forming temperature. From the determined parameters of the flow curve by the proposed inverse analysis method, it can be concluded that 1) the critical strain for the onset of dynamic recrystallization is dependent on strain rate as well as temperature, 2) the stain rate sensitivity of m ¼ 0:13 is acceptable for plain carbon steel under testing conditions, and 3) the temperature sensitivity A is approximately 3000-3600 [K À1 ]. Through investigation, it has become clearer that an accurate flow curve can be determined by the proposed method. In addition to a quantitative description of the flow curve as a function of strain, strain rate and temperature, metallurgical parameters such as the critical strain for the onset of dynamic recrystallization and steady-state stress could also be estimated directly by the proposed method.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flow Curve Determination for Metal under Dynamic Recrystallization Using Inverse Analysis

Yanagida

Liu

2003

Mater. Trans.

View full text Add to dashboard Cite

show abstract

“…The elastic region of flow curves was subtracted for subsequent flow stress analyses and modeling. More information about the hot deformation experiments on this material has been reported elsewhere [3,18] and are here revisited. …”

Section: Experimental Materials and Proceduresmentioning

confidence: 92%

“…Microalloyed or High Strength Low Alloy (HSLA) steels constitute an important category of steels estimated to be around 12% of total world steel production, which have been increasingly used in a variety of automotive components such as connecting rods, wheel hubs, suspension systems, crankshafts and driveline components [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

A simple constitutive model for predicting flow stress of medium carbon microalloyed steel during hot deformation

2015

View full text Add to dashboard Cite

This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. 1 A Simple Constitutive Model for Predicting Flow Stress of Medium Carbon Microalloyed Steel during Hot Deformation AbstractThe constitutive behavior of a medium carbon microalloyed steel during hot working over a wide range of temperatures and strain rates was studied using the Johnson-Cook (JC) model, the Hollomon equation, and their modifications. The original JC model was not able to predict the softening part of the flow curves and the subsequent modifications of the JC model to account for the softening stage and the strain dependency of constants were not satisfactory owing to the uncoupled nature of the JC approach regarding strain rate and temperature. The coupled effect of these variables was considered in the form of Zener-Hollomon parameter (Z) and the constants of the Hollomon equation were related to Z. This modification was found to be useful for the hardening stage but the overall consistency between the experimental flow curves and the calculated ones was not good. Therefore, a simple constitutive model was proposed in the current work, in which by utilization of the peak stress and strain into the Hollomon equation, good prediction abilities were attained. Conclusively, the proposed model can be considered as an efficient one for modeling and prediction of hot deformation flow curves.

show abstract

“…This is due to segregation on the dislocations and grain boundaries, causing a decrease in the recovery rate and grain boundary mobility (Ferdowsi et al, 2014). Instead, alloying elements precipitating on dislocations in the form of dispersive carbides and/or carbonitrides slow the course of recrystallization during plastic deformation (Cabrera et al, 1997;Mirzadeh, Cabrera, and Najafizadeh, 2012). The SRX behaviour depends on the processing parameters, such as strain rate, deformation temperature, and strain.…”

mentioning

confidence: 99%

Static recrystallization behaviour of Ti-Nb microalloyed high-strength steel

Zhou

Liu

2017

J. South. Afr. Inst. Min. Metall.

View full text Add to dashboard Cite

Modeling the flow behavior of a medium carbon microalloyed steel under hot working conditions

Cited by 177 publications

References 34 publications

Flow Curve Determination for Metal under Dynamic Recrystallization Using Inverse Analysis

Flow Curve Determination for Metal under Dynamic Recrystallization Using Inverse Analysis

A simple constitutive model for predicting flow stress of medium carbon microalloyed steel during hot deformation

Static recrystallization behaviour of Ti-Nb microalloyed high-strength steel

Contact Info

Product

Resources

About