Hot Deformation Characteristics of 13Cr-4Ni Stainless Steel Using Constitutive Equation and Processing Map

Kishor, Brij; Chaudhari, G.P.; Nath, S. K.

doi:10.1007/s11665-016-2159-4

Cited by 17 publications

(6 citation statements)

References 38 publications

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“…Rapidly increasing stress is detected at the initial deformation stage due to the rapidly increasing number of dislocation [25,26]. Following the above stage, the increasing rate of flow stress decreases gradually, resulting from DRV and DRX partially counteracting the effect of work hardening simultaneously [27]. The flow stress increases no more when the work hardening and the dynamic softening (caused by DRV and DRX) were in balance, and the peak was thus achieved.…”

Section: Flow Stress Curves and Friction Correctionmentioning

confidence: 99%

Hot deformation characteristics of Incoloy 926 super-austeniticstainless steel

Nie¹,

Yang²,

Wang³

et al. 2020

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The deformation behavior of the Incoloy 926 super-austenitic stainless steel at 1000-1150 • C and 0.001-10 s −1 was investigated. The corrected true stress-true strain curves were obtained by compensating the interfacial friction in the flow stress-strain curves. The interfacial friction increased the flow stress, and this increase was more pronounced at higher strains. According to the constitutive model, the activation energy varied from 328 to 384 kJ mol −1 with respect to strain. The mechanical parameters, peak stress and peak strain, critical stress and critical strain, were described by clearer equations with the temperature and strain rate. Moreover, based on the processing maps and the microstructural observation, the unsafe deformation domain where the localized plastic flow occurred was validated at above 1 s −1 , the favorable process at 1100 • C and 0.1 s −1 where fine and homogeneous grains can be obtained was determined simultaneously.

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Section: Flow Stress Curves and Friction Correctionmentioning

confidence: 99%

Hot deformation characteristics of Incoloy 926 super-austeniticstainless steel

Nie¹,

Yang²,

Wang³

et al. 2020

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“…The word recrystallization usually refers to the replacement of a deformation microstructure by new grains [62,63]. The process of recrystallization during heat treatment is called static recrystallization (SRX) [64,65].…”

Section: Dynamic Recrystallization Of Mss Under Hot Deformationmentioning

confidence: 99%

Review on Dynamic Recrystallization of Martensitic Stainless Steels during Hot Deformation: Part I—Experimental Study

Derazkola

García

Murillo-Marrodán

et al. 2021

Metals

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The evolution of the microstructure changes during hot deformation of high-chromium content of stainless steels (martensitic stainless steels) is reviewed. The microstructural changes taking place under high-temperature conditions and the associated mechanical behaviors are presented. During the continuous dynamic recrystallization (cDRX), the new grains nucleate and growth in materials with high stacking fault energies (SFE). On the other hand, new ultrafine grains could be produced in stainless steel material irrespective of the SFE employing high deformation and temperatures. The gradual transformation results from the dislocation of sub-boundaries created at low strains into ultrafine grains with high angle boundaries at large strains. There is limited information about flow stress and monitoring microstructure changes during the hot forming of martensitic stainless steels. For this reason, continuous dynamic recrystallization (cDRX) is still not entirely understood for these types of metals. Recent studies of the deformation behavior of martensitic stainless steels under thermomechanical conditions investigated the relationship between the microstructural changes and mechanical properties. In this review, grain formation under thermomechanical conditions and dynamic recrystallization behavior of this type of steel during the deformation phase is discussed.

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“…These parameters influence the microstructure evolution and the final product quality [1]. As such, an optimisation to thermo-mechanical processes will ensure that the produced components have the desired microstructure and free from deformation defects [1,4].…”

Section: Introductionmentioning

confidence: 99%

“…Constitutive modelling has been widely used to study metal flow behaviour taking into account the effects of process parameters [4,5]. The constitutive equations provide the intrinsic workability behaviour of the material during deformation [6].…”

Section: Introductionmentioning

confidence: 99%

“…The constitutive equations provide the intrinsic workability behaviour of the material during deformation [6]. The stress-strain state during deformation is complex [2], due to inhomogeneities effects of process parameters [4]. Physical simulations using the thermo-mechanical equipment have been applied to predict and simulate the metal forming processes [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Numerical simulation on the effect of sample geometry size on the metal flow behaviour during the forging process

Obiko

Mwema

2020

IOPSciNotes

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This paper reports on the effect of sample geometry size on the metal flow behaviour using Deform TM 3D finite element simulation software. The simulation process was done at forging temperature of 1100°C and upper die speed of 50 mm/second. The friction coefficient between the die and the sample interface was taken to be constant during the simulation process. The results of the effective stress and strain distribution in the deformed sample were reported. The results show that the effective stress and strain distribution in the deformed sample was non-uniformly distributed. The maximum effective strain occurred at the centre of the deformed sample for all the samples tested. The maximum effective stress occurred at the die-sample contact surface. At the contact surfaces, the effective stress decreased with a decrease in the sample size. The effective stress at the centre of the deformed sample increased with a decrease in the sample geometry size.

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Hot Deformation Characteristics of 13Cr-4Ni Stainless Steel Using Constitutive Equation and Processing Map

Cited by 17 publications

References 38 publications

Hot deformation characteristics of Incoloy 926 super-austeniticstainless steel

Hot deformation characteristics of Incoloy 926 super-austeniticstainless steel

Review on Dynamic Recrystallization of Martensitic Stainless Steels during Hot Deformation: Part I—Experimental Study

Numerical simulation on the effect of sample geometry size on the metal flow behaviour during the forging process

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