Roughly 15 permanent researchers and 15 PhD students, visitors or trainees are part of the PM group. Activities focus on the physical metallurgy of alloys. We aim to relate several structural scales and the complexity of atomic organization to the properties of the alloy material. These cover a wide range and include mechanical properties such as plasticity and failure, but also magnetic, electric or thermal properties, all of which are influenced by microstructure. We study industrial alloys, complex metallic phases and nanostructured systems (thin films, multilayers, etc.). More recently, the link between microstructure/nanostructure and properties has been extended in our studies to architectures (for instance sandwich structures) and a new research topic covering the relationship between microstructure, architecture and mechanical properties has emerged, in fruitful collaboration with the GPM2 group.
| - precipitation kinetics: experiments and modelling |
- relation between precipitation, microstructure and properties
- phase transformation and interface migration: recrystallization, massive transformation, etc.
- phase transformation and plasticity (TRIP/TWIP steels)- plasticity in micro/nanostructured systems
| - impact of size reduction on plasticity and phase transformation |
- metallic thin film deposited on patterned Si substrates
- interconnection for microelectronic applications: nanostructure characterization, properties, reliability
- ordering and magnetism in self-organized nanoparticles
|- complex metallic alloys: structure, defects, properties |
- Laves phases (MgZn2 structure type): atomic decoration, cluster analysis
- atomic structure, phonons and phasons in quasicrystalline
- composite alloys with high volume fraction of CMA phases
|- mechanical properties and design (collaboration with GPM2 group) |
- numerical simulation of mechanical behaviour of thin films
- microstructure and mechanical resistance of welding in Al alloys
- modelling of interfaces (adhesion, delamination..) (collaboration with SIR group)
We use mainly microscopy techniques (AFM, SEM, TEM) and X-ray scattering on laboratory equipment. Diffraction studies are complemented by X-ray or neutron experiments carried out at the ESRF synchrotron (in particular on the D2AM beamline, for which 4 members of the group are also local contacts) or the ILL neutron reactor. In parallel, and for each length scale, appropriate models are developed, both analytically and numerically. The activities of the PM group can be separated into several areas as listed below and illustrated by the titles of some studies currently in progress.
The group is also strongly involved in instrumentation, both for elaboration and characterization
Written by Sabine Lay-Dietrich
Date of update January 7, 2016