Modeling Deformation Flow Curves and Dynamic Recrystallization of BA-160 Steel During Hot Compression

Shahriari, Babak; Vafaei, Reza; Sharifi, E. Mohammad; Farmanesh, Khosro

doi:10.1007/s12540-018-0113-8

Cited by 9 publications

(3 citation statements)

References 35 publications

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“…[5][6][7][8] Generally, the hot workability of alloys are significantly influenced by deformation parameters. [9][10][11] Constitutive models are usually inserted into finite element software to simulate the variations of flow stresses with deformation parameters. [12][13][14] In a recent critical review, [9] three types of constitutive models were summarized, i.e., phenomenological models, [15][16][17][18][19] physically based models, [20][21][22][23][24][25][26] and artificial intelligence models.…”

Section: Introductionmentioning

confidence: 99%

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Hot Tensile Deformation Mechanism and Dynamic Softening Behavior of Ti–6Al–4V Alloy with Thick Lamellar Microstructures

Lin

Pang

et al. 2019

Adv Eng Mater

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The deformation mechanisms and dynamic softening behavior of a Ti–6Al–4V alloy with thick lamellar microstructures are studied by uniaxial hot tensile tests. The true stress first rapidly reaches a peak value because of the rapid dislocations proliferation and tangle, and then gradually decreases due to the dynamic softening with raising the deformation amount. The dynamic softening behavior is mainly induced by the severe dynamic globularization of lamellar α phases. The globularization of α phase is always accompanied by the formation of high‐angle grain boundaries (HAGBs). The fraction of globularized α phases increases with the increasing deformation temperature. The fracture mechanism is microvoid coalescence, i.e., in the initial stage of tensile deformation, the microvoids begin to emerge. With the increasing deformation amount, the number of microvoids increases, and the microvoids accumulate and accelerate to propagate until the final fracture. According to the experimental flow stress curves, a modified Arrhenius‐type equation and a Hensel–Spittel (HS) model are developed to forecast the flow stresses. The average absolute relative error of the established strain‐compensated Arrhenius‐type (SCAT) and HS models are 6.108% and 3.385%, respectively. Both models can be well used to describe the hot tensile flow characteristics of the Ti–6Al–4V alloy with thick lamellar microstructures.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Generally, the hot workability of alloys are significantly influenced by deformation parameters . Constitutive models are usually inserted into finite element software to simulate the variations of flow stresses with deformation parameters .…”

Section: Introductionmentioning

confidence: 99%

Hot Tensile Deformation Mechanism and Dynamic Softening Behavior of Ti–6Al–4V Alloy with Thick Lamellar Microstructures

Lin

Pang

et al. 2019

Adv Eng Mater

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“…In order to get the optimum microstructure in terms of properties, such as strength, ductility, impact toughness, and thermal stability, the deformation process parameters such as temperature, strain per pass, strain rate, and initial grain size must be well selected. When the metal is subjected to plastic deformation at high temperature larger than half melting temperature, dynamic recrystallization (DRX) is the main approach of microstructure control and mechanical property improvement [1][2][3][4]. erefore, detailed research on the DRX behavior of metals during hot working is essential to optimizing processing parameters.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Dynamic Recrystallization in 5CrNiMoV Steel during Hot Forming

Wang

2020

Advances in Materials Science and Engineering

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The dynamic recrystallization (DRX) behavior of 5CrNiMoV steel was investigated through hot compression at temperatures of 830–1230°C and strain rates of 0.001–10 s−1. From the experimental results, most true stress-strain curves showed the typical nature of DRX that a single peak was reached at low strains followed by a decrease of stress and a steady state finally at relatively high strains. The constitutive behavior of 5CrNiMoV steel was analyzed to deduce the operative deformation mechanisms, and the correlation between flow stress, temperature, and strain rate was expressed as a sine hyperbolic type constitutive equation. Based on the study of characteristic stresses and strains on the true stress-strain curves, a DRX kinetics model was constructed to characterize the influence of true strain, temperature, and strain rate on DRX evolution, which revealed that higher temperatures and lower strain rates had a favorable influence on improving the DRX volume fraction at the same true strain. Microstructure observations indicated that DRX was the main mechanism and austenite grains could be greatly refined by reducing the temperature of hot deformation or increasing the strain rate when complete recrystallization occurred. Furthermore, a DRX grain size model of 5CrNiMoV was obtained to predict the average DRX grain size during hot forming.

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Microstructure Evolution Modeling and Simulation for Dynamic Recrystallization of Cr12MoV Die Steel During Hot Compression Based on Real Metallographic Image

et al. 2019

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Modeling Deformation Flow Curves and Dynamic Recrystallization of BA-160 Steel During Hot Compression

Cited by 9 publications

References 35 publications

Hot Tensile Deformation Mechanism and Dynamic Softening Behavior of Ti–6Al–4V Alloy with Thick Lamellar Microstructures

Hot Tensile Deformation Mechanism and Dynamic Softening Behavior of Ti–6Al–4V Alloy with Thick Lamellar Microstructures

Evolution of Dynamic Recrystallization in 5CrNiMoV Steel during Hot Forming

Microstructure Evolution Modeling and Simulation for Dynamic Recrystallization of Cr12MoV Die Steel During Hot Compression Based on Real Metallographic Image

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