A constitutive model for transformation plasticity accompanying strain-induced martensitic transformations in metastable austenitic steels

Stringfellow, Richard; Parks, David M.; Olson, Gregory B.

doi:10.1016/0956-7151(92)90114-t

Cited by 474 publications

(348 citation statements)

References 17 publications

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“…This work presents a constitutive model for steels exhibiting SIMT, based on the previous works of Olson and Cohen (1975), Stringfellow et al (1992) and Papatriantafillou et al (2004). The model proposes an original law to include the effect of temperature increase in the kinetics of phase transformation.…”

Section: Introductionmentioning

confidence: 99%

“…They considered shear band intersections as sites for martens ite nucleation which lead to a characteristic sigmoidal equation for the volume fraction of martensite as a function of plastic strain. The model of Olson and Cohen (1975) was generalized by Stringfellow et al (1992) for 3 D analysis, including the effect of stress triaxiality in the process and viscoplastic behavior of the phases. Papatriantafillou et al (2004Papatriantafillou et al ( , 2006 coupled this model to a homogenization technique for nonlinear composites, proposed (Suquet, 1995a(Suquet, ,b, 1996, and used it to deter mine forming limit diagrams for sheets made of multiphase TRIP steels.…”

Section: Introductionmentioning

confidence: 99%

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A constitutive model for analyzing martensite formation in austenitic steels deforming at high strain rates

Zaera

Rodríguez-Martínez

Casado³

et al. 2012

International Journal of Plasticity

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a b s t r a c tThis study presents a constitutive model for steels exhibiting SIMT, based on previous sem inal works, and the corresponding methodology to estimate their parameters. The model includes temperature effects in the phase transformation kinetics, and in the softening of each solid phase through the use of a homogenization technique. The model was validated with experimental results of dynamic tensile tests on AISI 304 sheet steel specimens, and their predictions correlate well with the experimental evidence in terms of macroscopic stress strain curves and martensite volume fraction formed at high strain rates. The work shows the value of considering temperature effects in the modeling of metastable austen itic steels submitted to impact conditions. Regarding most of the works reported in the lit erature on SIMT, modeling of the martensitic transformation at high strain rates is the distinctive feature of the present paper.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A constitutive model for analyzing martensite formation in austenitic steels deforming at high strain rates

Zaera

Rodríguez-Martínez

Casado³

et al. 2012

International Journal of Plasticity

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“…Over the past 15 years, several constitutive models were developed for the analysis of the TRIP effect in metals [2,[5][6][7][8][9][10][11][12]. However, in most of these models the elasto-plastic deformation induced by the transformation is simplified through an isotropic model.…”

Section: Introductionmentioning

confidence: 99%

Modelling of the effects of grain orientation on transformation-induced plasticity in multiphase carbon steels

Tjahjanto

Turteltaub

Suiker

et al. 2006

Modelling Simul. Mater. Sci. Eng.

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The effects of grain orientation on transformation-induced plasticity in multiphase steels are studied through three-dimensional finite element simulations. The boundary value problems analysed concern a uniaxiallyloaded sample consisting of a grain of retained austenite surrounded by multiple grains of ferrite. For the ferritic phase, a rate-dependent crystal plasticity model is used that describes the elasto-plastic behaviour of body-centred cubic crystalline structures under large deformations. In this model, the criticalresolved shear stress for plastic slip consists of an evolving slip resistance and a stress-dependent term that corresponds to the projection of the stress tensor on a non-glide plane (i.e. a non-Schmid stress). For the austenitic phase, the transformation model developed by Turteltaub and Suiker (2006 Int. J. Solids Struct. at press, 2005 J. Mech. Phys. Solids 53 1747 is employed. This model simulates the displacive phase transformation of a face-centred cubic austenite into a body-centred tetragonal martensite under external mechanical loading. The effective transformation kinematics and the effective anisotropic elastic stiffness components in the model are derived from lower-scale information that follows from the crystallographic theory of martensitic transformations. In the boundary value problems studied, the mutual interaction between the transforming austenitic grain and the plastically deforming ferritic matrix is computed for several grain orientations. From the simulation results, specific combinations of austenitic and ferritic crystalline orientations are identified that either increase or decrease the effective strength of the material. This information is useful to further improve the mechanical properties of multiphase carbon steels. In order to quantify the anisotropic 1 Author to whom any correspondence should be addressed.

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“…As illustrated in Figure 11a, strain heterogeneity occurred during the bending process. However, the RA remained stable as the deformation did not reach a certain critical degree [36,37]. With further deformation, the retained austenite in the outer zone and inner zone transformed into martensite (as indicated in Figure 9).…”

Section: Strain Heterogeneity and Transformation Of Retained Austenitmentioning

confidence: 99%

The Impact of Strain Heterogeneity and Transformation of Metastable Austenite on Springback Behavior in Quenching and Partitioning Steel

Liu

et al. 2018

Metals

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Multiple strengthening methods, such as high dislocation density, high twin density, small grain size, and metastable austenite phase can give high strength to ultra-high strength steels (UHSSs). However, the high strength of UHSSs often results in a greater tendency for springback when applied in manufacturing vehicle components. In the present study, two types of UHSSs, dual-phase (DP) steel and quenching and partitioning (QP) steel are investigated to study the springback behavior during the bending process. Results indicated that both the strain heterogeneity and the transformation of retained austenite impacted the springback behavior. The springback angle of the DP steel increased with the increase in bending angle, which was caused by the increasing degree of strain heterogeneity. However, the springback angle of the QP steel decreased to a 14.75 • when QP specimens were strained at a 104 • bending angle due to the inhibiting effect of the phase transformation. This indicated that there was preferential phase transformation in the thickness direction in the retained austenite of the outer and inner zones. The phase transformation caused low strain heterogeneity, which resulted in a lower tendency for springback. The results suggested that QP steel could possess lower springback at a proper bending angle.

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A constitutive model for transformation plasticity accompanying strain-induced martensitic transformations in metastable austenitic steels

Cited by 474 publications

References 17 publications

A constitutive model for analyzing martensite formation in austenitic steels deforming at high strain rates

A constitutive model for analyzing martensite formation in austenitic steels deforming at high strain rates

Modelling of the effects of grain orientation on transformation-induced plasticity in multiphase carbon steels

The Impact of Strain Heterogeneity and Transformation of Metastable Austenite on Springback Behavior in Quenching and Partitioning Steel

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