Effect of Silicon and Aluminium on Austenite Static Recrystallization Kinetics in High-strength TRIP-aided Steels

Suikkanen, Pasi; Lang, Visa Tatu Emil; Somani, Mahesh C.; Porter, David; Karjalainen, L.P.

doi:10.2355/isijinternational.52.471

Cited by 23 publications

(21 citation statements)

References 34 publications

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“…The estimated Q app values for the 2Mn-1Si and 3Mn-1.5Si steels were about 225 and 241 kJ mol -1 , suggesting that an increase in Si and Mn contents increases Q app . The observed Q app values for the two steels fall in the 177-283 kJ mol -1 range of values reported for other steels, i. e. for C-Mn 184 kJ mol -1 [15,16], 9SMn28 free cutting steel 177 kJ/mol [37], 0.2C-2Mn-0.6Cr-(0-1.5)Si 193 -227 kJ mol -1 [32], C-Mn-Nb 230 kJ mol -1 [15,16], 12Cr stainless 265 kJ mol -1 [38], ordinary Fe-20Mn-1.5Al TWIP 218 kJ mol -1 and Nb-microalloyed Fe-20Mn-1.5Al-0.026Nb TWIP steel 273 kJ mol -1 [26] and Type 304 stainless steel 283 kJ mol -1 [38].…”

Section: Apparent Activation Energy Of Recrystallization (Q App )mentioning

confidence: 68%

“…Values of -2.8 and -2.5 for the strain exponent have been used by Somani et al [15,16,19] for C/C-Mn/Nb/Ti/Nb-Ti and Mn-V steels, respectively. Lang et al [42] and Suikkanen et al [32] obtained a value of -2.1 for p in the case of a 0.2C-2.0Mn-1.48Si-0.6Cr steel. Hence, all these values are of the same order and any distinct dependence on alloying can hardly be seen.…”

Section: Powers Of Strain and Strain Ratementioning

confidence: 99%

“…It gives the same power of strain rate (-0.23) as that of the 2Mn-1.5Si steel. Lang et al [42] determined the SRX kinetics for a 0.21C-1.48Si-2.04Mn-0.6Cr composition, also tested by Suikkanen et al [32], and found q to be -0.18. It is noteworthy that the 2Mn-1.5Si steel contains 1 % Cr in solution, and the steel studied by Lang et al [42] and Suikkanen et al [32] contained 0.6 % Cr.…”

Section: Powers Of Strain and Strain Ratementioning

confidence: 99%

“…Data for the SRX of high-Mn twinning induced plasticity (TWIP) type austenitic steels have been published [25,26], but very little SRX data are available for medium-Mn (3-5 % Mn) steels apart from the data of Grajcar et al [27,28] for 3 %Mn-Al(-Nb) and 5 %Mn-Al(-Nb) steels and Cabanas et al [29] for binary Fe-Mn alloys. Medina and Mancilla [30] and Medina and Quispe [31] earlier determined the kinetics as a function of chemical composition accounting for the effects of Si and Mn in addition to the microalloying elements of Nb, Ti and V. Increasing Si up to 0.4 % in some TRIP steels was found to decrease the SRX rate and increase the activation energy of recrystallization (Q rex ) [15,16] Suikkanen et al [32] showed that increasing Si beyond 0.4 % up to 1.5 % has only a small retarding effect on SRX, i. e. the influence of Si appeared to saturate towards 1.5 %.…”

Section: Introductionmentioning

confidence: 99%

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Static recrystallization characteristics and kinetics of high-silicon steels for direct quenching and partitioning

Somani

Porter

Karjalainen

et al. 2019

International Journal of Materials Research

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In the direct quenching and partitioning (DQ&P) process, tough ultra-high-strength steel is made by combining thermomechanical processing with quenching and partitioning to obtain martensite toughened by thin films of retained austenite. The hot rolling stage with deformation and recrystallization between the rolling passes affects the state of the austenite before quenching and partitioning. This paper describes the static recrystallization kinetics of two steels with compositions suited to DQ&P processing, viz. (in wt.%) 0.3C-1Si-2Mn-1Cr and 0.25C-1.5Si-3Mn. The stress relaxation technique on a Gleeble thermomechanical simulator provided recrystallization times over a wide range of temperature, strain, strain rate and initial grain size. The higher levels of Si and Mn made the recrystallization kinetics less sensitive to strain, strain rate and temperature. The equations derived to describe the recrystallization kinetics can be used in the design of the rough rolling part of thermomechanical processing.

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Section: Apparent Activation Energy Of Recrystallization (Q App )mentioning

confidence: 68%

Section: Powers Of Strain and Strain Ratementioning

confidence: 99%

Section: Powers Of Strain and Strain Ratementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Static recrystallization characteristics and kinetics of high-silicon steels for direct quenching and partitioning

Somani

Porter

Karjalainen

et al. 2019

International Journal of Materials Research

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show abstract

“…For example, the n value for C–Mn steels changes from 1 to 2 and from 0.7 to 1.3 for microalloyed steels as well as for high‐Mn Al‐alloyed steels dependent on a deformation temperature and a strain rate. Recently, Suikkanen et al reported the Avrami exponent values between 1 and 1.4 for different Mn–Cr TRIP steels containing various Si and Al content. Additionally, they concluded that Al alloying retards static recrystallization more strongly than Si alloying.…”

Section: Resultsmentioning

confidence: 99%

Effect of Finishing Hot‐Working Temperature on Microstructure of Thermomechanically Processed Mn–Al Multiphase Steels

Grajcar

Skrzypczyk

Kuziak

et al. 2014

steel research int.

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The study was devoted to the hot‐working behavior and the microstructure evolution of four thermomechanically processed Mn–Al‐alloyed multiphase steels. Determination of the hot deformation resistance of investigated steels was carried out on the basis of continuous compression, double‐hit compression, and seven‐step compression tests simulating conditions of hot strip rolling. The experiments were carried out using the Gleeble 3800 thermomechanical simulator. The physical simulation of hot strip rolling consisted of seven deformation steps characterized by decreasing strain, temperature, and interpass time whereas the strain rate values were gradually increased. A special attention was paid to the effect of Nb microaddition on the hot‐working behavior and microstructure evolution with the finishing hot‐working temperature varying in a range from 950 to 750°C. Morphological features of a bainite‐based matrix and retained austenite were identified using light microscopy and scanning electron microscopy techniques. A fraction of retained austenite was determined by X‐ray diffraction. The increase in the Mn content increases the softening kinetics of austenite. It was also found that the best conditions for thermal stabilization of retained austenite occur at 950°C for the steels containing 3% Mn.

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Influence of the Microalloying Elements on the Temporary Inhibition of Static Recrystallization by Strain-Induced Precipitates

Gómez¹,

Quispe

Medina³

2014

steel research int.

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The kinetics of static recrystallization of austenite and its transitory inhibition by straininduced precipitates have been characterized in several microalloyed steels with different compositions. This inhibition can be seen by the formation of "plateaus" in the curves of static recrystallization obtained from isothermal double-deformation tests. The influence of the type of microalloying element (Nb, V, Al) and the mean size of the precipitates on the duration time of the plateau of recrystallization inhibition has been studied and empirical relationships between these variables have been obtained. Al-steels present a much coarser particle size and a considerably shorter plateau compared to Nb and V-microalloyed steels.

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Effect of Silicon and Aluminium on Austenite Static Recrystallization Kinetics in High-strength TRIP-aided Steels

Cited by 23 publications

References 34 publications

Static recrystallization characteristics and kinetics of high-silicon steels for direct quenching and partitioning

Static recrystallization characteristics and kinetics of high-silicon steels for direct quenching and partitioning

Effect of Finishing Hot‐Working Temperature on Microstructure of Thermomechanically Processed Mn–Al Multiphase Steels

Influence of the Microalloying Elements on the Temporary Inhibition of Static Recrystallization by Strain-Induced Precipitates

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