Jean-François CROTEAU

An EASITrain Marie Curie PhD fellow and motivated collaborator with expertise in mechanical research engineer. He has experience both in North America and Europe in material characterization and additive manufacturing while currently he is embedded in an enterprise on the fabrication of particle accelerator components. 




2018 - 2019
R&D Engineer
I-Cube Research/Bmax, Toulouse, France
  • Mechanical research engineer on the fabrication of particle accelerator components
  • Experimental characterization of the mechanical properties of metals at low and high strain rates and of their microstructure
  • Budget management and creation of partnerships to reduce cost and accesss world-class infrastructures
Jan 2017 - Apr 2017
Teaching Assistant - Polymers and Ceramics Undergraduate Class
University of Ottawa
  • Conducted laboratory experiments for a second-year mechanical engineering class
  • Prepared and taught supplementary tutorials to help students develop extra curricular skills that they will use during their studies.
  • Grade midterms and laboratory reports within tight delays
May 2016 - Aug 2016
Research Assistant–Cold Spray Laboratory(co-op)
  • Worked in embedded strain gauges using cold spray with metallic, polymer and ceramic powders for use as smart sensors
  • Created copper fins on a graphics card's heat sink by using an innovative spraying technique
  • Collaborated with the University of Toronto by creating coatings of TiO2 for their photocatalytic properties
Sept 2015 - Jan 206
Assistant Project Manager (co-op)
Public Services and Procurement Canada
  • Contributed to the rehabilitation of the Parliament of Canada
  • Managed and approved contractor's time and material sheets to guarantee compliance of their work by developing VBA scripts
  • Produced daily reports on the construction site activities averaging approximately 450 workers daily
Jan 2015 - Apr 2015
Software Developer (co-op)
CAE Inc, Saint-Laurent Canada
  • Member of the Flight Dynamics team working on various aircraft simulator projects development using C++
  • Helped to develop standalone versions of simulators to test the code of the aerodynamics, avionics and propulsion groups
May 2014 - Dec 2014
Research Assistant - Materials Science Laboratory
University of Ottawa
  • Presentation of results to project sponsors helping to secure additional funding.
  • Researched creep properties of lead-free soldering alloys used in PCB.
  • Designed a new creep test rig.
2018 - 2019
PhD in mechanical engineering
ENSTA Bretagne, Brest, France
  • PhD student working full-time at I-Cube Research in Toulouse
  • Thesis topic: characterization of the mechanical properties of superconducting substrates at low and high strain rates
  • Marie Slowdoska-Curie Research Fellow of the EASITrain project (European sponsored project for the fabrication of CERN’s next particle accelerator, the Future Circular Collider)
  • Attended training on Project Management of the Vienna School of Economics and summer universities on superconductivity and particle accelerators
2017 - 2018
Master of Engineering in Mining and Materials Engineering
McGill University, Montréal, Canada
  • Fast track to PhD in France
  • Thesis topic: development of a finite element model of heat transfer during the selective laser melting process using Abaqus coupled with developed Python scripts and FORTRAN subroutines, and data analysis through a MATLAB code
  • Member of McGill’s additive manufacturing research laboratory
2012 - 2017
Bachelor of Applied Science in mechanical engineering with an option in management (3.96/4 GPA)
University of Ottawa, Ottawa, Canada
  • Management option covered the fundamentals of financial accounting, marketing, entrepreneurship and business management
  • Completed the co-operative education program (co-op) (16 months of full-time work)
  • Wrote an undergraduate thesis titled: Hybrid Rocket Combustion Reaction Analysis and Modelling
What is the key question you try to address?

Investigation of the mechanical properties at low and high velocities of high-purity copper and Nb for the manufacturing Superconducting RF (SRF) cavities. My work involved the characterization of these processes which will help to identify the advantages of high-velocity sheet forming for SRF cavity substrates. Results from these tests can then be used to predict the materials’ behaviour in a finite-element software used for the fabrication of particle accelerator components.

Which tools are you using in your research?

My research is rather interdisciplinary and combines a number of different methods and techniques. The main techniques that I had to master during my time in EASITrain are: Finite element analysis (FEA), digital image correlation (DIC), scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), electro-hydraulic forming (EHF), split Hopkinson pressure bars (SHPB), servo-hydraulic tensile machines, screw-driven universal testing machines, and programing (Python and MATLAB).

Which are the latest results from your work?

First tests were performed at Metz (France) in collaboration with the LEM3 laboratory and the Université de Lorraine and a second series of tests in London (United Kingdom) in collaboration with Imperial College. The results will be published or presented during 2020. The next steps in my research are: (1) Mechanical characterization of electron beam welds on OFE-Cu and Nb at low and high strain rates, (2) forming limit diagram of Nb at quasi-static rate and (3) electro-hydraulic forming of 800 MHz Nb half-cells.

Which are the potential applications of this technology?

Electro-hydraulic forming is a versatile high-velocity sheet forming technology used in the automobile industry to manufacture various large components as well as small parts for high value products. The specific application studied during the EASITrain program could apply in the fabrication of superconducting radio frequency cavities for particle accelerators, but the obtained results and methodologies will be extrapolated to other commercial applications.

Other outreach activities.

I presented my project and results at the following conferences: FCC Week 2018 (Amsterdam, Netherlands), International Conference on the Strength of Materials (ICSMA) 18 (Columbus, USA), 8th International Workshop on Thin Films and New Ideas for Pushing the Limits of RF Superconductivity (Legnaro, Italy), FCC Week 2019 (Brussels, Belgium), CFM 2019 (Brest, France). I was also a panelist at the EuroScience Open Forum (ESOF) 18 conference (Toulouse, France) to discuss the Future Circular Collider (FCC) from the perspective of a company. Finally, I presented my results at meetings or seminars at the Michigan State University (East Lansing, USA), the Imperial College (London, UK), the Madrid Institute for Advanced Studies (IMDEA) (Getafe, Spain) and the Laboratory of study of microstructures, mechanics and material sciences (LEM3) (Metz, France).


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