Numerical Analysis for the Prediction of Microstructure after Hot Forming of Structural Metals

Ye, Jun

doi:10.2320/matertrans.mf200906

Cited by 7 publications

(9 citation statements)

References 27 publications

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“…This necessitates the numerical analysis for predicting the microstructure and kinetic properties of structural metal after hot/cold forming in order to satisfy both requirements as described by Yanagimoto (2008). The aim of this paper is to point out the current status and remaining problems to realize the microstructure and kinetic properties predictions for a wide range of structural metals by forming.…”

Section: Introductionmentioning

confidence: 98%

Numerical Analysis for Microstructure Control in Hot Forming Process

Dupin

Liu³

et al. 2014

Procedia Engineering

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The importance of structural metals for industrial applications is based on their superior combination of mechanical propertiesstrength, elongation, toughness and corrosion resistance -achieved at the end of forming processes. A numerical analysis for the prediction of microstructure is strongly required for the optimization of hot forming process parameters, because the microstructure of structural metals, which has the significant effects on mechanical properties, is strongly dependent to forming process conditions as well as the chemical composition. The off-line and on-line analyses of microstructure evolution are explained briefly, and the results of its application to hot strip rolling are presented. The linkage of microstructure analysis to kinetic property prediction of product is discussed, and finally, the remaining research topic, such as enlarging the analytical scheme to various alloys, is presented.

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Section: Introductionmentioning

confidence: 98%

Numerical Analysis for Microstructure Control in Hot Forming Process

Dupin

Liu³

et al. 2014

Procedia Engineering

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“…The optimum flow curve calculated by inverse analysis can be used to obtain material genome, which is a group of constitutive equations to describe the kinetics of microstructural evolution of a material. 3) The compression test at a high strain rate can cause unwanted effects that leads to inaccurate stress-strain data. A nonuniform strain rate due to the acceleration of the main ram is one of them.…”

Section: Introductionmentioning

confidence: 99%

Flow Stress Measurement and Dynamic Response Analysis of Hot Compression Test Machine at High Strain Rates

et al. 2020

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Flow stress is the most important information for hot strip rolling as it affects the rolling force and the thickness of the rolled product. A high-speed compression test up to a strain rate of 300 s − 1 , which is the compression speed of 3 600 mm•s − 1 for a 12-mm-high cylindrical specimen, is necessary as a strain rate of 100-300 s − 1 is the normal rate in the production of hot-strip-rolled steel sheets. An experiment is conducted using a servo-hydraulic compression test machine, which enables a high compression speed and a high temperature, but the oscillation is observed in stress-strain curve at high strain rate over 50 s − 1. To determine the natural frequency of the compression test machine, the Savitzky-Golay filtering method is used for regression and the fast Fourier transformation (FFT) is adopted. To explain the mechanism of this phenomenon, a spring-mass-damper model is used and the results are compared with the FFT analysis result. After eliminating oscillation on the time versus load curve, a flow curve is obtained by inverse analysis, which compensates for the nonuniform strain rate, the inhomogeneous distribution of deformation, and the temperature increase during deformation.

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“…The optimization of the plastic deformation conditions of steels is gaining increasing attention in the research and development of hot forming technologies [29]. Based on the dynamic materials model(DMM), the processing map technology has been established as an effective approach to investigate the deformation mechanisms of materials and find the optimal processing parameters.…”

Section: Introductionmentioning

confidence: 99%

Flow stress modeling, processing maps and microstructure evolution of 05Cr17Ni4Cu4Nb Martensitic stainless steel during hot plastic deformation

Zhou

Feng

et al. 2020

Mater. Res. Express

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The hot deformation behavior of 05Cr17Ni4Cu4Nb stainless steel at the temperatures from 950°C to 1250°C and strain rates from 0.01 s −1 to 5 s −1 was investigated on the basis of test data obtained by Gleeble1500D thermo-simulation machine. A two-stage flow stress constitutive model incorporating the effects of the strain rate and temperature on the deformation behavior is proposed. The stressstrain relations of 05Cr17Ni4Cu4Nb steel predicted by the proposed model agree well with the experimental results. Moreover, the hot processing maps are also investigated. Combined with the microstructure evolution analysis, the appropriate hot forming processing parameters of 05Cr17Ni4-Cu4Nb steel is proposed in the temperature range of 1000-1100°C and strain rate range of 0.01-0.02 s −1 .

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Numerical Analysis for the Prediction of Microstructure after Hot Forming of Structural Metals

Cited by 7 publications

References 27 publications

Numerical Analysis for Microstructure Control in Hot Forming Process

Numerical Analysis for Microstructure Control in Hot Forming Process

Flow Stress Measurement and Dynamic Response Analysis of Hot Compression Test Machine at High Strain Rates

Flow stress modeling, processing maps and microstructure evolution of 05Cr17Ni4Cu4Nb Martensitic stainless steel during hot plastic deformation

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