LHUISSIER Pierre

Teaching activities

Research activities

My research primarily focuses on investigating the phenomena occurring at the microstructural scale during the processing and forming of metallic alloys. Various phenomena—such as dendritic growth, hot cracking, damage, and porosity closure—are examined through a novel lens using X-ray tomography, which provides 3D and time-resolved imaging deep within materials. Kinematic field measurements, combined with numerical simulations, enable the validation of models, the identification of active mechanisms, and the determination of the most critical configurations.

This strategy is applied to a wide range of scientific themes. One major focus is the hot deformation of lightweight alloys, where I study deformation mechanisms, damage evolution, and porosity closure during rolling. A second key area is additive manufacturing via laser powder bed fusion, with a particular emphasis on the mechanical properties of architectured materials in relation to process-induced defects (e.g., roughness, porosity, dimensional variations). My work also extends to diverse topics, including the solidification of lightweight alloys (reinforced or not with nanoparticles), powder sintering, the densification of Antarctic firn, electric fuse arc channel formation, and cavitation-induced turbine damage.

To advance this research, I must develop several tools and methods centered around tomography, including imaging conditions and contrast modalities. This relies on strong collaborations with the European Synchrotron Radiation Facility (ESRF), enabling in situ micro- and nano-tomography developments, as well as a regional consortium to unlock new capabilities for laboratory-based tomographic equipment. The processing of these highly rich but voluminous datasets requires the development of specialized and efficient algorithms (e.g., GPU implementations), such as coupling digital image correlation with object tracking under extreme deformations or local measurements of growth kinetics.

Thus, my activity is structured around two core scientific themes, strongly anchored in the use of cutting-edge characterization tools, while also engaging with numerous related challenges.

Additional information

  0000-0001-5100-9716
  pierre-lhuissier
 Pierre Lhuissier
  Pierre_Lhuissier