Adaptive Finite Element Simulations for Macroscopic and Mesoscopic Models of Steel

The investigation of complex material behaviour of steel like transformation-induced plasticity (TRIP) and stress-dependent phase transformation (SDPT) is a large field of current research. The simulation of the material behaviour of work-pieces in complex situations requires a knowledge as deep as possible about such phenomena. In addition, there are effects in the case of non-constant stress which cannot be explained by the widely used Leblond model for TRIP. Therefore, we consider a TRIP model taking into account back stress due to TRIP itself. Based on experimental data for the isothermal pearlitic transformation of the steel 100Cr6 (SAE52100) under step-wise loads we calculate material parameters for the extended TRIP model. Regardless of the preliminary character of the performed tests, all experiments show a back-stress effect with a decrease of the TRIP strain after unloading.Keywords: steel, TRIP, back stress, stress-dependent phase transformation, step-wise load

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“…are necessary for sufficiently correct calculations of processes in work-pieces (cf. [18,19], e.g. ), during heat treatment, e.g.…”

Section: Discussionmentioning

confidence: 99%

“…Assuming the TRIP model with back stress (3), the assumption (4), and only temperature dependence of the TRIP parameters j b and c (16), we determined the latter ones by the formulas (19), (20), following from assumptions (3), (4), (16).…”

Section: Discussionmentioning

confidence: 99%

TRIP and phase evolution for the pearlitic transformation of the steel 100Cr6 under. step-wise loads

Wolff¹,

Böhm

Dalgic

et al. 2006

Mat.-wiss. u. Werkstofftech.

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“…The coupled system of equations was solved using a 3D finite element discretization. The numerical method used here was described in [12]; some preliminary results were presented in [13].…”

Section: Simulationsmentioning

confidence: 99%

Simulation of anisotropic dilation behaviour of layered and banded steel samples during phase changes

Schmidt

Suhr

Böhm

et al. 2007

Philosophical Magazine Letters

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We consider anisotropic distortions due to solid-solid phase transformations during heat treatment of a layered or banded material which exhibits transformation-induced plasticity. These anisotropic macroscopic effects are due to the local microstructure orientation on a mesoscopic scale. We present numerical simulations for different types of microstructure and their effect on macroscopically observable deformations.

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Material behavior of steel – Modeling of complex phenomena and thermodynamic consistency

Wolff

Böhm

Helm

2008

International Journal of Plasticity

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Adaptive Finite Element Simulations for Macroscopic and Mesoscopic Models of Steel

Cited by 3 publications

References 12 publications

TRIP and phase evolution for the pearlitic transformation of the steel 100Cr6 under. step-wise loads

TRIP and phase evolution for the pearlitic transformation of the steel 100Cr6 under. step-wise loads

Simulation of anisotropic dilation behaviour of layered and banded steel samples during phase changes

Material behavior of steel – Modeling of complex phenomena and thermodynamic consistency

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