Guillaume Hanon
PhD student
Ir. at UCL in 2020

Main project: Interplay of plasticity and Hydrogen diffusion in roll-bonded Aluminium multi-laminates
Funding: PDR
Supervisor(s): Laurent Delannay

Just like many other metals, aluminium alloys are susceptible to hydrogen embrittlement. This may result in early failure, which raises maintenance costs and may even forbid the use of these alloys in some applications (corrosive environment, H storage, ...) where their excellent strength- to-density ratio would otherwise be a significant asset.
My research is an original investigation of the influence of diffusible H on the micromechanics and the occurrence of damage inside lightly alloyed aluminium polycrystals. It has two main objectives. On the one hand, we will investigate how diffusible H influences dislocation-mediated plasticity in aluminium alloys. On the other hand, we will analyse the diffusion and the trapping of H inside samples with composite laminate structures. The two goals are closely interconnected since the diffusion routes and the H traps are expected to be influenced by the dislocation substructure and also by the build-up of internal stresses within the multiphase polycrystal.

IMMC main research direction(s):
Solid mechanics

Research group(s): MEMA