Detailed study of the transformation mechanisms in ferrous TRIP aided steels

Iung, Thierry; Drillet, J.; Couturier, A.; Olier, Christopher

doi:10.1002/srin.200200200

Cited by 14 publications

(9 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the past decades, many research activities took place to optimize the processing parameters of the intercritical annealing, and of the subsequent isothermal bainitic transformation to adapt the heat treatment production of TRIP steels to existing annealing and galvanizing lines . In parallel, the effect of alloying elements on phase transformation, final microstructure, and induced mechanical properties has been intensively investigated .…”

Section: Trip Effect In Low Carbon Trip Steelsmentioning

confidence: 99%

The TRIP Effect and Its Application in Cold Formable Sheet Steels

Bleck

Guo

2017

steel research int.

166

100

View full text Add to dashboard Cite

The Transformation-Induced-Plasticity (TRIP) effect is used for enhancing the formability of cold formable sheet steels. While the first observation of this phenomenon dates back to the 1930's, the industrial usage of the TRIP steels started after 1950. First fully austenitic steels, later on multiphase steels have been developed with a meta-stable austenitic phase that can transform stress-assisted or strain-induced into eor a 0 -martensite during deformation. The historic development, the principles of the TRIP effect, and the different groups of steels using the TRIP effect are described. For the already commercialized TRIP steels, characteristic chemical compositions and microstructures are discussed; the requirements for the process design as well as new annealing concepts after cold rolling are explained. . Since 2016, he has been working in the Steel Institute of RWTH Aachen University as a scientific researcher. His research topic focuses on the microstructuremechanical properties relationship of high-Mn and medium-Mn steels.

show abstract

Section: Trip Effect In Low Carbon Trip Steelsmentioning

confidence: 99%

The TRIP Effect and Its Application in Cold Formable Sheet Steels

Bleck

Guo

2017

steel research int.

166

100

View full text Add to dashboard Cite

show abstract

“…A plateau and a subsequent resumption in the overall kinetics are expected when the precipitation is delayed after significant bainitic ferrite formation. 2,3) The relative tendency of carbide precipitation cannot be discussed solely in terms of the thermodynamic driving pressure such that a kinetic analysis based on nucleation and growth of cementite is required. Further, the diffusion distance of the carbon rejected into the austenite can potentially influence the extent of carbide formation and consequently the stabilization of the remaining austenite, such that despite carbide precipitation thin layers of retained austenite were observed in LC30 specimens.…”

Section: Discussionmentioning

confidence: 99%

“…At sufficiently high holding temperature, i.e. 1 h at 500°C, extensive carbide precipitation has been reported in a 0.47C-1.55Mn-1.75Al-0.25Si steel, 2) whereas the holding of 72 h at 380°C did not lead to any discernible carbide formation in a 0.4C-3.0Mn-2.0Si steel. 1) However, for the latter Si containing steel at lower transformation temperatures and within a very short time, i.e.…”

Section: Some Microstructural Aspects Of Bainite In High-carbon Si-mnmentioning

confidence: 94%

See 1 more Smart Citation

Some Microstructural Aspects of Bainite in High-carbon Si-Mn Steels

Fazeli

Wang

2007

ISIJ Int.

View full text Add to dashboard Cite

“…This range of austenitic carbon concentrations is in accordance with experimental data on TRIP steels. [1,7,[21][22][23][24][25] . The variation of carbon concentration is taken into account through adapting the following material properties in the model for austenite (see Tjahjanto et al [13] for a detailed description).…”

Section: Austenitic Carbon Concentrationmentioning

confidence: 99%

A Micromechanical Study of the Deformation Behavior of TRIP‐Assisted Multiphase Steels as a Function of the Microstructural Parameters of the Retained Austenite

et al. 2009

View full text Add to dashboard Cite

Steels assisted by transformation-induced plasticity (TRIP steels) are a class of multiphase carbon steels that have interesting mechanical characteristics due to the presence of metastable grains of austenite in their microstructure at room temperature (retained austenite). Upon application of thermal and/or mechanical loading, the grains of retained austenite may transform into martensite, which strongly influences the overall mechanical performance of the steels. Consequently, the stability of retained austenite against transformation is considered to be an important factor in the mechanical performance of this class of steels. Experimental investigations show that the stability of retained austenite is influenced by various microstructural parameters, such as the initial phase volume fractions (phase morphology), [1][2][3] the austenite carbon concentration [1,[4][5][6][7] and the austenitic grain size. [8][9][10] However, in most cases it is difficult to directly measure the individual contributions of these parameters to the stability of retained austenite since, during the processing of experimental samples, microstructural parameters typically cannot be varied independently.In the present work, the overall mechanical behavior of a discrete aggregate of ferritic and austenitic grains, representative of a microstructure of TRIP-assisted steels, is simulated numerically. The goal is to elucidate by means of a parametric study the specific effect of each microstructural parameter on the effective mechanical response, i.e., the effective stressstrain response and the evolution of martensitic transformation. Previous work by the authors was concerned with analyzing the influence of the initial phase volume fractions and carbon concentration [11] and grain size [12] for multiphase TRIP steels with high-yield austenitic phases (which do not deform plastically prior to transformation). In the present analysis, employing the constitutive model presented in Tjahjanto et al., [13] the influence of possible plastic deformations in austenite prior to transformation is taken into account.The results provide important information for further development of the mechanical performance of TRIP steels as well as for the optimization of TRIP steel processing routes. Micromechanical Models, Sample Geometries, and Boundary ConditionsThe type of multiphase steels considered in the present analysis consist of isolated grains of retained austenite embedded in a ferritic matrix. For simplicity, the behavior of the bainitic phase is combined with the effective behavior of the matrix. The constitutive model presented in Tjahjanto et al. [13] is applied to simulate the elastic, plastic, and transformation mechanisms in the austenitic grains and the elasto-plastic response of the ferritic matrix. This model combines the transformation model of Turteltaub and Suiker [14][15][16] [used to simulate the transformation of facecentered cubic (FCC) austenite into body-centered tetragonal (BCT) martensite] with a crystal plasticity model (used...

show abstract

Detailed study of the transformation mechanisms in ferrous TRIP aided steels

Cited by 14 publications

References 6 publications

The TRIP Effect and Its Application in Cold Formable Sheet Steels

The TRIP Effect and Its Application in Cold Formable Sheet Steels

Some Microstructural Aspects of Bainite in High-carbon Si-Mn Steels

A Micromechanical Study of the Deformation Behavior of TRIP‐Assisted Multiphase Steels as a Function of the Microstructural Parameters of the Retained Austenite

Contact Info

Product

Resources

About