Catégorie d'événement : Séminaire

Abstract Additive manufacturing (AM) enables the production of complex titanium and ceramic components; however, the inherent surface roughness, porosity, and microstructural defects often limit their performance. Surface modification techniques play a crucial role in enhancing mechanical strength, wear resistance, corrosion behaviour, and biological response. This seminar provides an overview of the physical and chemical characterization … Lire plus

26 Nov 2025

Séminaire

Brigita Abakevičienė: Surface Modification of Additively Manufactured Titanium and Ceramic Materials

• 1st floor Meeting room, LEM3 – Metz Technopole, 7 rue Félix Savart, 57070 Metz

français

Abstract Rigorous analyses of dislocation microstructures are necessary to conduct fundamental studies of plastic deformation mechanisms. These characterizations make it possible to determine the Burgers vectors and habitat planes (climb and/or slip) of dislocations, which are essential data for providing crystal plasticity models. For simple microstructures where a few slip-systems are active, characterizations using weak-beam … Lire plus

06 Nov 2025

Séminaire

Alexandre Mussi: Latest developments in electron tomography of dislocations: from 3D to 4D, 3D to mechanics, and TEM to SEM

• 1st floor meeting room, LEM3 – Metz Technopôle, 7 rue Félix Savart, 57070 Metz

anglais

Résumé La fragilisation par métal liquide (FML) d’un matériau par ailleurs ductile est un phénomène de transition de mode de rupture induite par l’environnement. Il est caractérisé par une vitesse de propagation potentiellement élevée des fissures fragiles et des effets néfastes sur les propriétés mécaniques. La FML englobe également la dégradation induite par le phénomène de … Lire plus

17 Oct 2025

Séminaire

Thierry Auger : Fragilisation par métal liquide : des critères énergétiques aux facteurs d’intensité des contraintes d’amorçage de fissures

• Salle de réunion du 1e étage, LEM3 – site Metz Technopole, 7 rue Félix Savart, 57070 Metz

français

Organized as part of the Mat-Pulse interdisciplinary program. Abstract This seminar presents first a strategy of vibration attenuation of a beam when multiple resonant frequencies of the structure are excited. The mechanism of multiple bandgap formation is presented by first deriving the equations of motion of the meta-structure based on Hamilton’s principle and then utilizing … Lire plus

23 Sep 2025

Séminaire

Sami El-Borgi: Vibration Attenuation Using Locally Resonant Multiple Bandgap Formation

• Room A 208, Polytech Nancy, 2 Rue Jean Lamour, 54519 Vandœuvre-lès-Nancy

anglais

Abstract Tribology is a highly interdisciplinary field. It requires an understanding in physics, chemistry, biology, materials science, mechanical engineering, chemical engineering, etc. Tribological interaction starts at surface of two bodies in relative motion (do note that one of the bodies can be a fluid). And this interaction leads to wear. In this talk I will try to simplify … Lire plus

04 Juil 2025

Séminaire

Satish V. Kailas: Tribology – A synergistic process that is tribo-system controlled

• 1st floor meeting room, LEM3 – site Metz Technopôle, 7 rue Félix Savart, 57070 Metz

anglais

Abstract The interaction between grain boundaries (GBs) and dislocations is a key problem in materials science and mechanics. Pile up of dislocations around GBs gives raise to the Hall-Petch effect; a microstructure with small grains has more GBs that act as barriers causing dislocation pile-up resulting in a higher yield strength compared to a microstructure … Lire plus

04 Juil 2025

Séminaire

Brayan Murgas: Implementing an energy based dislocation transmission criteria for dislocation-grain boundary interaction using a dislocation transport based crystal plasticity model

• 1st floor meeting room, LEM3 – site Metz Technopôle, 7 rue Félix Savart, 57070 Metz

anglais

Abstract Recent advances in scanning technologies and digital twinning have enabled the high-fidelity capture of geometric details in composite microstructures. In this talk, I will present state-of-the-art spectral methods for analyzing the morphology of complex 2D and 3D microstructures. I will highlight how these techniques are used to generate statistically similar surfaces and introduce my … Lire plus

25 Juin 2025

Séminaire

Mahmoud Shaqfa: From Morphology to High-Fidelity Simulations: Spectrally Accurate Modeling of Microstructures

• 1st floor meeting room, LEM3 – site Metz Technopôle, 7 rue Félix Savart, 57070 Metz

anglais

Under the aegis of the Medicis programme Abstract Hydrogen is widely regarded as a promising energy carrier for the future, due to its abundance, high energy content, and potential for clean utilization. Its combustion results in water vapor as the sole byproduct, making it a highly environmentally friendly fuel. However, the development of hydrogen-based energy … Lire plus

16 Juin 2025

Séminaire

Kaveh Edalati: High-entropy hydrogen storage materials

• 1st floor meeting room, LEM3 – site Metz Technopôle, 7 rue Félix Savart, 57070 Metz

anglais

Sous l’égide du programme Medicis Résumé Lors de ce séminaire, on exposera dans un premier temps une démarche constructive et systématique des approches variationnelles de modèles à gradient d’endommagement en tirant profit du cadre bien connu des Matériaux Standard Généralisés (notamment sa formulation globale décrite par Germain, Nguyen et Suquet, 1983). Sur le plan méthodologique, … Lire plus

13 Juin 2025

Séminaire

Djimédo Kondo : Du bon usage des approches variationnelles pour l’étude de l’endommagement et de son couplage avec la thermoélasticité/poroélasticité

• Salle de réunion du 1e étage, LEM3 – site Metz Technopôle, 7 rue Félix Savart, 57070 Metz

français

Under the aegis of the Medicis programme Abstract Interfaces, whether grain boundaries in polycrystalline materials or heterointerfaces in multiphase solids, are ubiquitous in materials science and engineering. Far from being simple separation surfaces between neighboring crystals, understanding the role of solid-solid interfaces represents a major challenge, requiring advanced theoretical and numerical strategies to describe their … Lire plus

13 Mai 2025

Séminaire

Aurélien Vattré: Micromechanical Modeling of Crystalline Interfaces

• Online (Microsoft Teams)

anglais