dr inż. Karol Frydrych

Zakład Mechaniki Materiałów (ZMM)
Pracownia Mikromechaniki Materiałów (PMM)
stanowisko: adiunkt
telefon: (+48) 22 826 12 81 wew.: 436
pokój: 138
e-mail: kfryd

Doktorat
2017-10-26Modelowanie ewolucji mikrostruktury metali o wysokiej wytrzymałości właściwej w procesach intensywnej deformacji plastycznej 
promotor -- dr hab. inż. Katarzyna Kowalczyk-Gajewska, IPPT PAN
1258
 
Ostatnie publikacje
1.Frydrych K., Kowalczyk-Gajewska K., Microstructure Evolution in Cold-Rolled Pure Titanium: Modeling by the Three-Scale Crystal Plasticity Approach Accounting for Twinning, METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, ISSN: 1073-5623, DOI: 10.1007/s11661-018-4676-2, Vol.49, No.8, pp.3610-3623, 2018

Streszczenie:

A three-scale crystal plasticity model is applied to simulate microstructure evolution in hcp titanium subjected to cold rolling. Crystallographic texture and misorientation angle development, as an indicator of grain refinement, are studied. The impact of twinning activity on both phenomena is accounted for by combining the original three-scale formulation with the probabilistic twin-volume consistent (PTVC) reorientation scheme. The modeling results are compared with available experimental data. It is shown that the simulated textures are in accordance with the experimental measurements. The basic components of misorientation angle distribution, especially in the range of high angle boundaries, are also well reproduced.

Afiliacje autorów:

Frydrych K.-IPPT PAN
Kowalczyk-Gajewska K.-IPPT PAN
35p.
2.Frydrych K., Kowalczyk-Gajewska K., Grain refinement in the equal channel angular pressing process: simulations using the crystal plasticity finite element method, MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING, ISSN: 0965-0393, DOI: 10.1088/1361-651X/aad46d, Vol.26, No.6, pp.065015-1-065015-32, 2018

Streszczenie:

Grain refinement due to severe plastic deformation is simulated using the crystal plasticity finite element method in the total Lagrangian setting. A rate-independent model with the regularized Schmid law is applied. As an example, a single pass of the equal channel angular pressing process is considered. Texture evolution, misorientation angle distributions and maps of new grains are presented. A special algorithm for tracking the creation of new grains in finite element simulations is developed. The results are analysed with respect to experimental data available in the literature. The possible mechanisms leading to the fragmentation of grains in a face centred cubic material are discussed. The influence of the quality of the microstructure representation on the simulation results is assessed

Słowa kluczowe:

crystal plasticity, severe plastic deformation, grain refinement, finite element method

Afiliacje autorów:

Frydrych K.-IPPT PAN
Kowalczyk-Gajewska K.-IPPT PAN
35p.
3.Frydrych K., Kowalczyk-Gajewska K., A three-scale crystal plasticity model accounting for grain refinement in fcc metals subjected to severe plastic deformations, MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, ISSN: 0921-5093, DOI: 10.1016/j.msea.2016.01.101, Vol.658, pp.490-502, 2016

Streszczenie:

A new three-scale model of polycrystal accounting for grain refinement is proposed. The model is embedded into the crystal plasticity framework. With the experimental reference to the development of the dislocation induced cell substructure, a single crystallite in the representative grain aggregate is initially subdivided into subdomains with the crystallographic orientations slightly misoriented with respect to the nominal orientation of a parent grain. The predicted misorientation evolution of subgrains with respect to the reference orientation of a crystallite is an indicator of grain refinement. The correlation between the increase of a misorientation angle and a slip activity pattern is analyzed. The model predictions are compared with available experimental data.

Słowa kluczowe:

Crystal plasticity, Severe plastic deformation, Grain refinement

Afiliacje autorów:

Frydrych K.-IPPT PAN
Kowalczyk-Gajewska K.-IPPT PAN
35p.
4.Kowalczyk-Gajewska K., Sztwiertnia K., Kawałko J., Wierzbanowski K., Wroński M., Frydrych K., Stupkiewicz S., Petryk H., Texture evolution in titanium on complex deformation paths: Experiment and modelling, MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, ISSN: 0921-5093, DOI: 10.1016/j.msea.2015.04.040, Vol.637, pp.251-263, 2015

Streszczenie:

Texture evolution in commercially pure titanium deformed by equal-channel angular pressing (ECAP) and extrusion with forward–backward rotating die (KoBo) is studied both experimentally and numerically. New results are provided that demonstrate the effects of distinct and complex deformation paths on the texture in the ultra-fine grained (UFG) material obtained after severe plastic deformation (SPD). The numerical simulations are based on the self-consistent viscoplastic method of grain-to-polycrystal scale transition. A recently proposed modification of the probabilistic scheme for twinning is used that provides consistent values of the twin volume fraction in grains. The basic components of the experimentally observed texture are reasonably well reproduced in the modelling. The numerical simulations provide an insight into the internal mechanisms of plastic deformation, revealing substantial activity of mechanical twinning in addition to the basal and prismatic slip in titanium processed by ECAP.

Słowa kluczowe:

Texture evolution, UFG materials, SPD processes, Crystal plasticity, Twinning

Afiliacje autorów:

Kowalczyk-Gajewska K.-IPPT PAN
Sztwiertnia K.-other affiliation
Kawałko J.-other affiliation
Wierzbanowski K.-other affiliation
Wroński M.-other affiliation
Frydrych K.-IPPT PAN
Stupkiewicz S.-IPPT PAN
Petryk H.-IPPT PAN
35p.

Prace konferencyjne
1.Kowalczyk-Gajewska K., Stupkiewicz S., Frydrych K., Petryk H., Modelling of Texture Evolution and Grain Refinement on Complex SPD Paths, JOURNAL OF PHYSICS: CONFERENCE SERIES, ISSN: 1742-6588, DOI: 10.1088/1757-899X/63/1/012040, No.63, pp.012040-1-10, 2014

Streszczenie:

A computationally efficient procedure for modelling of microstructural changes on complex and spatially nonuniform deformation paths of severe plastic deformation (SPD) is presented. The analysis follows a two-step procedure. In the first step, motivated by saturation of material hardening at large accumulated strains, the steady-state kinematics of the process is generated for a non-hardening viscoplastic model by using the standard finite element method for a specified SPD scheme. In the second step, microstructural changes are investigated along the deformation-gradient trajectories determined in the first step for different initial locations of a material element. The aim of this study is to predict texture evolution and grain refinement in a non-conventional process of cold extrusion assisted by cyclic rotation of the die, called KOBO process, which leads to an ultra-fine grain structure. The texture evolution is calculated for fcc and hcp metals by applying crystal visco-plasticity combined with the self-consistent scale transition scheme. In parallel, by applying the simplified phenomenological model of microstructure evolution along the trajectories, grain refinement is modelled. The results are compared with available experimental data.

Słowa kluczowe:

SPD processes, Texture evolution, UFG materials, Crystal plasticity, Grain refinement

Afiliacje autorów:

Kowalczyk-Gajewska K.-IPPT PAN
Stupkiewicz S.-IPPT PAN
Frydrych K.-IPPT PAN
Petryk H.-IPPT PAN
10p.

Abstrakty konferencyjne
1.Frydrych K., Kowalczyk-Gajewska K., Modelling microstructure evolution in SPD processes in the framework of crystal plasticity theory, ICTAM XXIV, 24th International Congress of Theoretical and Applied Mechanics, 2016-08-21/08-26, Montréal (CA), pp.1-2, 2016
2.Kowalczyk-Gajewska K., Frydrych K., Modelling of microstructure evolution in metals and alloys of high specific strength, SolMech 2016, 40th Solid Mechanics Conference, 2016-08-29/09-02, Warszawa (PL), No.P196, pp.1-2, 2016
3.Frydrych K., Kowalczyk-Gajewska K., Modelling of texture evolution and grain refinement in metals and alloys of high specific strength in SPD processes, EUROMAT 2015, European Congress and Exhibition on Advanced Materials and Processes, 2015-09-20/09-24, Warszawa (PL), pp.C1.1-1-2, 2015

Streszczenie:

Texture evolution and grain refinement in materials subjected to severe plastic deformation (SPD), in particular the ECAP and KoBo extrusion processes are examined in this work. The well known ECAP process consists in extruding a billet through an angular channel. In the KOBO process material is extruded with assistance of cyclic rotation of a die. Both processes lead to considerable grain refinement and often to strong texture evolution [2,5]. The VPSC code itself provides different variants of self-consistent (SC) micro-macro transition scheme. It was combined with the proposed crystal plasticity framework and has been used to simulate texture evolution. However, this model is two-scale and does not predict the grain refinement. In order to examine the latter phenomenon three-scale model of microstructure evolution was developed. The model is able to combine two micro-macro transition schemes to simulate the evolution of orientations inside a grain and decide if the formation of subgrains has occurred.

Słowa kluczowe:

texture evolution, grain refinement, SPD processes, crystal plasticity, micromechanics

Afiliacje autorów:

Frydrych K.-IPPT PAN
Kowalczyk-Gajewska K.-IPPT PAN
4.Kowalczyk-Gajewska K., Frydrych K., Maj M., Urbański L., Micromechanical modelling of magnesium alloy and its experimental verification, PCM-CMM 2015, 3rd Polish Congress of Mechanics and 21st Computer Methods in Mechanics, 2015-09-08/09-11, Gdańsk (PL), pp.677-678, 2015

Streszczenie:

Micromechanical modelling of magnesium alloys is presented. The applied model combines the crystal plasticity framework accounting for twinning with the self-consistent grain-to-polycrystal scale transition scheme. The mechanical response of the material in the experiments involving the strain path changes is studied, together with the prediction of the accompanying texture evolution. It is demonstrated that the evolution of microstructure has an important impact on the overall material behaviour. The model predictions will be verified in experiments performed on the rolled sheets made of AZ31B alloy

Słowa kluczowe:

micromechanics, crystal plasticity, twinning, texture evolution

Afiliacje autorów:

Kowalczyk-Gajewska K.-IPPT PAN
Frydrych K.-IPPT PAN
Maj M.-IPPT PAN
Urbański L.-IPPT PAN
5.Frydrych K., Kowalczyk-Gajewska K., Stupkiewicz S., Modelling of microstructure evolution in hcp polycrystals on non-proportional strain paths, SolMech 2014, 39th Solid Mechanics Conference, 2014-09-01/09-05, Zakopane (PL), pp.207-208, 2014

Streszczenie:

Microstructure evolution in hcp polycrystals subjected to severe plastic deformation, in particular in the KOBO extrusion and the equal channel angular pressing (ECAP) processes, are examined in this work, using the crystal plasticity framework. Modelling approach combines the large strain crystal plasticity model accounting for twinning and the tangent variant of the self-consistent (SC) scale transition scheme.

Słowa kluczowe:

hcp polycrystals, twinning, SPD processes, crystal plasticity, self-consistent model, microstructure evolution

Afiliacje autorów:

Frydrych K.-IPPT PAN
Kowalczyk-Gajewska K.-IPPT PAN
Stupkiewicz S.-IPPT PAN