Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Groma, Istvan"'
Autor:
Ugi, Dávid, Zoller, Kolja, Lukács, Kolos, Fogarassy, Zsolt, Groma, István, Kalácska, Szilvia, Schulz, Katrin, Ispánovity, Péter Dusán
In metals geometrically necessary dislocations (GNDs) are generated primarily to accommodate strain gradients and they play a key role in the Bauschinger effect, strain hardening, micron-scale size effects and fatigue. During bending large strain gra
Externí odkaz:
http://arxiv.org/abs/2306.08262
Autor:
Lipcsei, Sándor, Kalácska, Szilvia, Ispánovity, Péter Dusán, Lábár, János L., Dankházi, Zoltán, Groma, István
The dislocation microstructure developing during plastic deformation strongly influences the stress-strain properties of crystalline materials. The novel method of high resolution electron backscatter diffraction (HR-EBSD) offers a new perspective to
Externí odkaz:
http://arxiv.org/abs/2207.10516
Autor:
Ugi, Dávid, Péterffy, Gábor, Lipcsei, Sándor, Fogarassy, Zsolt, Szilágyi, Edit, Groma, István, Ispánovity, Péter Dusán
Plastic deformation of microsamples is characterised by large intermittent strain bursts caused by dislocation avalanches. Here we investigate how ion irradiation affects this phenomenon during single slip single crystal plasticity. To this end, in s
Externí odkaz:
http://arxiv.org/abs/2206.13906
Autor:
Ispánovity, Péter Dusán, Ugi, Dávid, Péterffy, Gábor, Knapek, Michal, Kalácska, Szilvia, Tüzes, Dániel, Dankházi, Zoltán, Máthis, Kristián, Chmelík, František, Groma, István
Compression experiments on micron-scale specimens and acoustic emission (AE) measurements on bulk samples revealed that the dislocation motion resembles a stick-slip process - a series of unpredictable local strain bursts with a scale-free size distr
Externí odkaz:
http://arxiv.org/abs/2107.13334
Autor:
Ugi, Dávid, Zoller, Kolja, Lukács, Kolos, Fogarassy, Zsolt, Groma, István, Kalácska, Szilvia, Schulz, Katrin, Ispánovity, Péter Dusán
Publikováno v:
In Materials & Design February 2024 238
Publikováno v:
Phys. Rev. B 103, 174101 (2021)
To develop a dislocation-based statistical continuum theory of crystal plasticity is a major challenge of materials science.During the last two decades such a theory has been developed for the time evolution of a system of parallel edge dislocations.
Externí odkaz:
http://arxiv.org/abs/2012.12560
A numerical method is developed to efficiently calculate the stress (and displacement) field in finite 2D rectangular media. The solution is expanded on a function basis with elements that satisfy the Navier-Cauchy equation. The obtained solution app
Externí odkaz:
http://arxiv.org/abs/1908.11422
Autor:
Kalácska, Szilvia, Dankházi, Zoltán, Zilahi, Gyula, Maeder, Xavier, Michler, Johann, Ispánovity, Péter Dusán, Groma, István
Mechanical testing of micropillars is a field that involves new physics, as the behaviour of materials is non-deterministic at this scale. To better understand their deformation mechanisms we applied 3-dimensional high angular resolution electron bac
Externí odkaz:
http://arxiv.org/abs/1906.06980
Autor:
Ugi, Dávid, Péterffy, Gábor, Lipcsei, Sándor, Fogarassy, Zsolt, Szilágyi, Edit, Groma, István, Ispánovity, Péter Dusán
Publikováno v:
In Materials Characterization May 2023 199
Publikováno v:
Phys. Rev. B 98, 054110 (2018)
We study a continuum model of dislocation transport in order to investigate the formation of heterogeneous dislocation patterns. We propose a physical mechanism which relates the formation of heterogeneous patterns to the dynamics of a driven system
Externí odkaz:
http://arxiv.org/abs/1708.05533