Finite Element Investigation for Edge Wave Prediction in Hot Rolled Steel during Run Out Table Cooling

Cho, Hoon-Hwe; Cho, Yigil; Kim, Dong-Wan; Kim, Se Jong; Lee, Won-Beom; Han, Heung Nam

doi:10.2355/isijinternational.54.1646

Cited by 23 publications

(11 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Phase transformation and relaxation of the stress were taken into account. Cho et al [11] developed a three-dimensional numerical model to predict the edge wave behavior of hotrolled steel strip on the ROT based on the FE method. e e ect of the edge mask width and the checkers on the edge wave is examined through a series of simulations.…”

Section: Introductionmentioning

confidence: 99%

Reduction of Residual Stress for High‐Strength Low‐Alloy Steel Strip Based on Finite Element Analysis

Qiu

Shao

et al. 2018

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

Intensive cooling technology is widely utilized in the production of high-strength hot-rolled steel strip. However, intensive cooling at high cooling rate may cause stress heterogeneity on a steel strip, which further generates great residual stress and influences steel strip shape. In this study, a three-dimensional finite element (FE) model of high-strength low-alloy steel strip on the run-out table coupled with heat transfer, phase transformation, and strain/stress is developed by ABAQUS software. To enhance modeling precision, several experiments are conducted, such as uniaxial tensile test at multiple temperatures, dynamic continuous cooling transformation, and scanning electron microscopy, to determine the material properties and boundary conditions of the FE model. Four new models are established based on this model to reduce the residual stress of strip by modifying the initial and boundary conditions. Results show that reducing the initial transverse temperature difference is the most effective in reducing residual stress, followed by sparse cooling, edge masking, and posterior cooling.

show abstract

Section: Introductionmentioning

confidence: 99%

Reduction of Residual Stress for High‐Strength Low‐Alloy Steel Strip Based on Finite Element Analysis

Qiu

Shao

et al. 2018

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

show abstract

“…It should be mentioned that ε thm given by (12) is related to the microstructure and should not be mixed up with the homogenized hydrostatic strain ε thm given by (5). The classic plastic strain …”

Section: Eigenstrain and Transformation Induced Plasticitymentioning

confidence: 99%

“…Classic couplings between heat conduction, phase transition and mechanics are presented in figure 2. Thus, most estimations of residual stresses [17,18,[3][4][5] relies on highly coupled computations even though some couplings are neglected, for instance the effect of strain and 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 stress on thermal and phase transition problems (dotted lines in figure 2). Despite the fact that the cited works present different degrees of details, the most common numerical strategy consists in developing a user material (UMAT) in the Finite Element software Abaqus [19] in order to solve simultaneously the heat conduction problem, phase transitions (via Avrami's equation) and the mechanical problem.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Residual stress on the run out table accounting for multiphase transitions and transformation induced plasticity

Weisz-Patrault

Koedinger

2018

Applied Mathematical Modelling

View full text Add to dashboard Cite

The development of harder and thinner new steel grades necessitates reasonably fast numerical simulations of forming processes in order to optimize industrial conditions through parametric studies. This paper focuses on the evolution of residual stresses of thin strips during cooling on the run out table. Since the problem involves multiphysics and non-linear processes, comprehensive and fully coupled numerical approaches may be difficult to use to design or optimize industrial conditions because of extensive computation times. Therefore, a simplified numerical simulation has been developed and consists in solving first the thermal problem coupled with multiphase transitions and then the mechanical problem accounting for thermal expansion, metallurgical deformation and transformation induced plasticity. Residual stress profiles through the strip thickness are also computed in order to evaluate classic flatness defects such as crossbow and longbow. A postprocessing is also included in order to quantify out of plane displacements that would take place if the strip were cut off the production line. It consists in computing at finite strain the relaxation of residual stresses when the tension applied by the coiler is released. The proposed numerical strategy has been tested on common industrial conditions. Highlights• Numerical strategy to simulate a non-linear and multiphysics problem: the cooling of a steel strip on the run out table.• Heat conduction strongly coupled with metallurgical transformations and an elastic-plastic calculation of residual stress evolution.• Thermal expansion, density mismatch between phases and transformation induced plasticity modeled as eigenstrain.• Significant decrease of the initial residual stress profile, but the asymmetry is responsible for bending moments• Flatness defects such as longbow and crossbow are detected.Preprint submitted to Applied Mathematical Modelling September 3, 2017 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 Residual stress on the run out *Highlights AbstractThe development of harder and thinner new steel grades necessitates reasonably fast numerical simulations of forming processes in order to optimize industrial conditions through parametric studies. This paper focuses on the evolution of residual stresses of thin strips during cooling on the run out table. Since the problem involves multiphysics and non-linear processes, comprehensive and fully coupled numerical approaches may be difficult to use to design or optimize industrial conditions because of extensive computation times. Therefore, a simplified numerical simulation has been developed and consists in solving first the thermal problem coupled with multiphase transitions and then the mechanical problem accounting for thermal expansion, metallurgical deformation and transformation induced ...

show abstract

“…Uneven temperature distribution across the width of the plate during cooling process will result in significant thermal stress, and it causes plastic deformation and consequently introduces residual stress and plate flatness defect. 10,11) At present, temperature control of cooling plate in width has disadvantages of instability and low level of automation. It usually relies on manual adjustment, consumes lots of human resource and gets unsatisfactory results.…”

Section: Problem Existingmentioning

confidence: 99%

A Novel 1.5D FEM of Temperature Field Model for an Online Application on Plate Uniform Cooling Control

Tian¹,

Xiong²,

Tian³

et al. 2017

ISIJ Int.

View full text Add to dashboard Cite

In wide steel plate cooling process, the temperature distribution along width direction especially near plate edges is very important for properties and flatness of products. Therefore, the temperature distribution in the thickness and width direction should be considered by the online control model. High accuracy and quick response of control are the keys of industrial application. Due to the big cross-section of wide plate, the number of elements by traditional 2D mesh method is very large. So, it cannot have both computing speed and accuracy. To solve this problem, a novel 1.5D mesh method, which combines 1D and 2D ways, was studied in this paper. The feasibility of the proposed method was testified by the energy balance equation and experiments. Through comparison analysis, 1.5D model possesses faster speed and higher precision. In practical application, the model has a good performance on water crown and edge mask control of plate cooling to improve the temperature uniformity in the entire width direction.

show abstract

Finite Element Investigation for Edge Wave Prediction in Hot Rolled Steel during Run Out Table Cooling

Cited by 23 publications

References 15 publications

Reduction of Residual Stress for High‐Strength Low‐Alloy Steel Strip Based on Finite Element Analysis

Reduction of Residual Stress for High‐Strength Low‐Alloy Steel Strip Based on Finite Element Analysis

Residual stress on the run out table accounting for multiphase transitions and transformation induced plasticity

A Novel 1.5D FEM of Temperature Field Model for an Online Application on Plate Uniform Cooling Control

Contact Info

Product

Resources

About