A Material Model for TRIP‐Steels and its Application to a CrMnNi Cast Alloy

Prüger, Stefan; Kuna, Meinhard; Wolf, Steffen; Krüger, Lutz

doi:10.1002/srin.201100072

Cited by 15 publications

(13 citation statements)

References 22 publications

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“…The key idea of transformation kinetics goes back to Olson and Cohen (1975), who found, that deformation bands and their intersections in the austenitic grains are nucleation sites of the martensitic phase. This model was later extended by Stringfellow (1990), and further improvements were done in Prüger et al (2011b).…”

Section: Martensitic Phase Transformationmentioning

confidence: 99%

“…In the following, the equations describing the straininduced martensite formation as developed by Prüger et al (2011b) are briefly presented. The key idea of transformation kinetics goes back to Olson and Cohen (1975), who found, that deformation bands and their intersections in the austenitic grains are nucleation sites of the martensitic phase.…”

Section: Martensitic Phase Transformationmentioning

confidence: 99%

“…Regarding the non-linear homogenization we refer to Papatriantafillou et al (2006), Prüger et al (2011b).…”

Section: Homogenized Hypoelastic-viscoplastic Formulationmentioning

confidence: 99%

“…Hereby, indices are marked by subscripted italic lower case letters and Einstein's summation convention is employed. Prüger et al (2011a;2011b) developed a material model for a casted austenitic TRIP-steel, which is used here for crack analyses. The model is based on the transformation kinetics of Olson and Cohen (1975) and former work by Papatriantafillou et al (2006).…”

Section: Introductionmentioning

confidence: 99%

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Stress analysis and configurational forces for cracks in TRIP-steels

2015

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TRIP-steels are known to possess attractive mechanical properties attributed to the austenitemartensite phase transformation, which provides additional deformability and hardening. In the present work the influence of strain-induced phase transformation on fracture is studied numerically for a casted TRIP-steel utilizing a recently developed material model. Large strain finite element analyses are carried out for a twodimensional crack under small-scale yielding conditions to determine mechanical fields and fracture characterizing parameters. The results show that the hardening effect of martensite formation causes increased stresses and stress triaxiality ahead of the crack tip, which has implications for failure behavior. In order to generalize the classical J-integral for transformation plasticity, the concept of material forces is applied and numerically implemented. An appropriate pathindependent formulation of the J-integral is suggested for TRIP-steels. A considerable amount of material forces is due to plastic deformation and phase transformation. The resultant material force at the crack tip is considered as the relevant energetic driving force for fracture. Furthermore, crack growth resistance curves J − Δa are simulated by means of a cohesive zone model, which allows to simulate the intrinsic fracture toughness. From the analyses, the beneficial impact of strain-induced phase transformation on the fracture resistance R-curves can be concluded. The transformation zone affects an energetic shielding of the very fracture process zone.

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Section: Martensitic Phase Transformationmentioning

confidence: 99%

Section: Martensitic Phase Transformationmentioning

confidence: 99%

“…Regarding the non-linear homogenization we refer to Papatriantafillou et al (2006), Prüger et al (2011b).…”

Section: Homogenized Hypoelastic-viscoplastic Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stress analysis and configurational forces for cracks in TRIP-steels

2015

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“…The material model was developed for austenitic TRIP-steels by Prüger et al [22,23]. It is based on the model presented by Papatriantafillou et al [21] and the transformation kinetics of Olson and Cohen [20].…”

Section: Materials Modelmentioning

confidence: 99%

Crack tip fields in ductile materials with martensitic phase transformation – A numerical 2D study

Burgold

Kuna

Prüger

2015

Engineering Fracture Mechanics

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Study of Reinforcing Mechanisms in TRIP‐Matrix Composites under Compressive Loading by Means of Micromechanical Simulations

et al. 2013

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TRIP‐matrix composites consist of austenitic steel and a partially stabilized zirconia, which yields a composite that can undergo a martensitic phase transformation in both components. Numerical analysis of the deformation and transformation behavior of such a composite is carried out by means of unit cell studies. The micromechanical simulations are conducted to separate and evaluate the two reinforcing mechanisms, namely the particle strengthening effect and the transformation effect in the partially stabilized zirconia. It is found that the phase transformation proceeds in a heterogeneous manner both in the matrix and the inclusion. The degree of inhomogeneity of transformation inside the inclusion is controlled by the interface strength.

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A Material Model for TRIP‐Steels and its Application to a CrMnNi Cast Alloy

Cited by 15 publications

References 22 publications

Stress analysis and configurational forces for cracks in TRIP-steels

Stress analysis and configurational forces for cracks in TRIP-steels

Crack tip fields in ductile materials with martensitic phase transformation – A numerical 2D study

Study of Reinforcing Mechanisms in TRIP‐Matrix Composites under Compressive Loading by Means of Micromechanical Simulations

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