Institute of Physics of Materials AS CR, v. v. i. > Projects > Inverse process chain modeling for Al-castings and induction heat treated steel rods

Inverse process chain modeling for Al-castings and induction heat treated steel rods

Co-investigatorRNDr. Jiří Svoboda, CSc., DSc.
Number of ProjectA1.17
AgencyMaterials Center Leoben
Duration2014-03-31 - 2018-03-30

Anotace
By Through-Process-Modeling and inverse optimization of two process chains (i) ‘casting-solution annealing-quenching-aging’ and (ii) ‘straightening-inductive austenitizing-quenching-inductive tempering-air cooling’ the understanding for the involved processes will be extended. Especially (i) a local properties optimization approach due to local heat treatment for castings will be developed and (ii) the induction heat treatment process will be analyzed in detail, a test bench will be built and physically based process models will be developed and implemented in MatCalc as well as in an MCL-owned software package.
The knowledge based conversion of one heat treatment route into another (e.g. furnace to induction) via property forecasting and the knowledge of an optimal parameter field for reaching desired target values represents a technological novelty and is an essential part of the process control by inverse process chain simulation to be developed in this project.

2017

Fischer F., Zickler G., Svoboda J.: Modelling of grain refinement driven by negative grain boundary energy. Philos. Mag. 97 (2017) 1963-1977

Svoboda J., Fischer F.: Incorporation of vacancy generation/annihilation into reactive diffusion concept - Prediction of possible Kirkendall porosity. Comp. Mater. Sci. 127 (2017) 136-140

Hackl K., Fischer F., Svoboda J.: A variational approach to the modelling of grooving in a three-dimensional setting. Acta Mater. 129 (2017) 331-342

Fischer F., Zickler G., Svoboda J.: Calibration of phase field parameters demonstrated on kinetics of a shrinking single grain. Philos. Mag. Lett. 97 (2017) 92-100


2016

Svoboda J., Shan Y., Kozeschnik E., Fischer F.: A thermokinetic model for Mg-Si couple formation in Al-Mg-Si alloys. Model. Simul. Mater. Sci. Eng. 24 (2016) 1-16

Fischer F., Svoboda J., Antretter T., Kozeschnik E.: Stress relaxation by power-law creep during growth of a misfitting precipitate. Int. J. Solids Struct. 96 (2016) 74-80

Fischer F., Hackl K., Svoboda J.: Improved thermodynamic treatment of vacancy-mediated diffusion and creep. Acta Mater. 108 (2016) 347-354

Svoboda J., Fratzl P., Zickler G., Fischer F.: A new treatment of transient grain growth. Acta Mater. 115 (2016) 442-447

Svoboda J., Fischer F.: A self-consistent model for thermodynamics of multicomponent. Scr. Mater. 126 (2016) 154-157

Svoboda J., Fischer F., Riedl H., Kozeschnik E.: Precipitate growth in multi-component systems with stress relaxation by diffusion and creep. Int. J. Plast. 82 (2016) 112-126


2015

Svoboda J., Zickler G., Kozeschnik E., Fischer F.: Kinetics of interstitial segregation in Cottrell atmospheres and grain boundaries. Philos. Mag. Lett. 95 (2015) 458-465

Fischer F., Svoboda J.: Stress, deformation and diffusion interactions in solids - A simulation study. J. Mech. Phys. Solids 78 (2015) 427-442

Fischer F., Svoboda J., Antretter T., Kozeschnik E.: Relaxation of a precipitate misfit stress state by creep in the matrix. Int. J. Plast. 64 (2015) 164-176

Svoboda J., Shan Y., Fischer F.: A new self-consistent model for thermodynamics of binary solutions. Scr. Mater. 108 (2015) 27-30

Ženíšek J., Kozeschnik E., Svoboda J., Fischer F.: Modelling the role of compositional fluctuations in nucleation kinetics. Acta Mater. 91 (2015) 365-376


2014

Svoboda J., Shan Y., Kozeschnik E., Fischer F.: Determination of depths of multiple traps for interstitials and their influence on diffusion kinetics. Model. Simul. Mater. Sci. Eng. 22 (2014) 065015

Svoboda J., Stopka J., Fischer F.: Two-dimensional simulation of reactive diffusion in binary systems. Comp. Mater. Sci. 95 (2014) 309-315

Svoboda J., Fischer F., Klinger L., Rabkin E.: The effect of surface contact conditions on grain boundary interdiffusion in a semi-infinite bicrystal. Philos. Mag. 94 (2014) 3398-3412

Svoboda J., Fischer F.: Generalization of the Lifshitz-Slyozov-Wagner coarsening theory to non-dilute multi-component systems. Acta Mater. 79 (2014) 304-314