Members

IMMC

Guerric Lemoine
PhD student
Ir. at UCL in 2013
Contact

Main project: Viscoplasticity and strain localization in metallic thin films
Funding: UCL Assistant
Supervisor(s): Laurent Delannay, Thomas Pardoen

Metallic thin films are widely used in the microelectronic industry and for surface functionalization. Owing to their very fine microstructure, thin films generally suffer of a lack of ductility and are prone to creep at room temperature. To avoid such detrimental effects in applications, their mechanical behaviors have to be characterized and modeled. Combining both experiments and simulations, my doctoral research focus on the rate dependent plasticity and the strain localization of metallic thin films. The Lab-on-chip technique is used to characterize the yield stress, the ductility, the hardening behavior and the strain rate sensitivity of Ni thin films. A localized necking model is also developed, dedicated to thin films and nano crystalline metals which aims at accounting for strain gradient plasticity effects, for grain size dependent strength, rate sensitivity and the possible contribution of creep/relaxation mechanisms. A dislocation-based crystal plasticity model has also been developed in order to study the mechanical and creep/relaxation behavior of the polycrystalline Pd thin films with high initial defect concentration, obtained by M-S Colla during her PhD thesis.

IMMC main research direction(s):
Processing and characterisation of materials
Solid mechanics

Keywords:
micromechanics
plasticity
thin films

Research group(s): MEMA - IMAP

    

Recent publications

See complete list of publications

Journal Articles


1. Delannay, Laurent; Lemoine, Guerric; Coulombier, Michaël; Pardoen, Thomas. Modelling creep induced by internal stresses in freestanding submicron Cu film. In: IOP Conference Series: Materials Science and Engineering, Vol. 580, p. 012003 (2019). doi:10.1088/1757-899x/580/1/012003. http://hdl.handle.net/2078.1/224243

2. Lemoine, Guerric; Delannay, Laurent; Idrissi, Hosni; Colla, Marie-Stéphane; Pardoen, Thomas. Dislocation and back stress dominated viscoplasticity in freestanding sub-micron Pd films. In: Acta Materialia, Vol. 111, p. 10-21 (2016). doi:10.1016/j.actamat.2016.03.038. http://hdl.handle.net/2078.1/173058


Conference Papers


1. Lemoine, Guerric; Colla, Marie-Stéphane; Pardoen, Thomas; Delannay, Laurent. Dislocation and back stress dominated viscoplasticity in freestanding sub-micron Pd films. http://hdl.handle.net/2078.1/177394

2. Lemoine, Guerric; Colla, Marie-Stéphane; Idrissi, Hosni; Pardoen, Thomas; Delannay, Laurent. Dislocation and back stress dominated viscoplasticity in free-standing sub-micron Pd films. http://hdl.handle.net/2078.1/174809

3. Lemoine, Guerric; Colla, Marie-Stéphane; Pardoen, Thomas; Delannay, Laurent. Crystal Plasticity based modelling of Viscoplasticity in Nanocrystalline FCC Thin Films. http://hdl.handle.net/2078.1/173465

4. Lemoine, Guerric; Colla, Marie-Stéphane; Amin-Ahmadi, B.; Idrissi, Hosni; Schryvers, D.; Raskin, Jean-Pierre; Pardoen, Thomas; Delannay, Laurent. Study of creep/relaxation in nanocrystalline FCC thin films through internal-stress-actuated microtensile testing method. http://hdl.handle.net/2078.1/160868

5. Ribesse, Arnaud; Favache, Audrey; Lemoine, Guerric; Bailly, Christian; Jacques, Pascal; Pardoen, Thomas. Multiscale mechanical and tribological characterization of AlSi abradable material. In: Book of abstracts, 2014. http://hdl.handle.net/2078.1/173390

6. Lemoine, Guerric; Colla, Marie-Stéphane; Idrissi, Hosni; Raskin, Jean-Pierre; Pardoen, Thomas; Delannay, Laurent. Crystal plasticity based modelling of strain hardening and creep in nanocrystalline freestanding Pd films. http://hdl.handle.net/2078.1/157189

7. Lemoine, Guerric; Colla, Marie-Stéphane; Idrissi, Hosni; Raskin, Jean-Pierre; Pardoen, Thomas; Delannay, Laurent. Crystal plasticity based modelling of strain hardening and creep in nanocrystalline freestanding Pd films. http://hdl.handle.net/2078.1/157190

8. Lemoine, Guerric; Colla, Marie-Stéphane; Raskin, Jean-Pierre; Pardoen, Thomas; Delannay, Laurent. Crystal plasticity based modelling of strain hardening and creep in nanocrystalline FCC thin films. http://hdl.handle.net/2078.1/146547

9. Pardoen, Thomas; Coulombier, Michaël; Colla, Marie-Stéphane; Lemoine, Guerric; Vayrette, Renaud; Ghidelli, Matteo; Blandin, Jean-Jacques; Gravier, Sébastien; Delannay, Laurent; Raskin, Jean-Pierre. Size dependent plastic localization in thin nanocrystalline or amorphous metallic films. http://hdl.handle.net/2078.1/173420


Dissertations


1. Lemoine, Guerric. Time dependent plasticity and strain localization in nanocrystalline metallic thin films, prom. : Delannay, Laurent ; Pardoen, Thomas, 30/04/2018. http://hdl.handle.net/2078.1/200816