• Thesis: Grain-Boundary based deformation mechanisms in ultra-fine grain metals.

    This thesis, essentially experimental, consists in deforming several small-grain fcc metals (Cu, Ni, Al) in situ in a dedicated and unique in the world AFM / STM (PPrime Institute, Poiters) and in transmission electron microscopy (TEM)) (CEMES-CNRS, Toulouse). TEM is one of the few techniques capable of imaging grain boundaries in the thickness of the metal (thin slice of a few hundred nm) with nanoscale precision. In situ AFM / STM will complement these observations by revealing, at the atomic scale, the displacements perpendicular to the surface. The combination of the two experiments will provide complete information on the mechanism of shear/migration of grain boundaries under stress. Crystal orientation mappings (TEM or SEM) should be used to characterize the type of migration depending on the type of grain boundary.

    This thesis, funded as part of the RODIN project (Role of disconnections in grain boundary-based plasticity – French ANR Agency) can begin between March 2018 and October 2019. The schedule of experiments between Poitiers and Toulouse is flexible, but should be on the order of 50-50 of the 3 years contract. The applicant will have a solid background in materials science and crystallography. Applications should be sent to christophe.coupeau@univ-poitiers.fr and/or marc.legros@cemes.fr 

     For futher information on the subject, see document attached below:

     


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  • Thesis: In situ TEM study of elementary plasticity mechanisms. 

    Project: MuDiLingo, a EU-ERC project awarded to S. Sandfeld, (U. Freiberg, Germany) is approaching the plasticity problems in a totally new way, digging experimental data from dynamic experiments and turning them into time-resolved strain or energy fields.

    In the frame of this project, this thesis will focus on observing elementary mechanisms of the plasticity in High Entropy Alloys (HEA) and twinned Copper, with the objective of gaining quantitative information on the way they unfold. The choice of these two materials are dictated by the puzzling resistance to deformation of face centered cubic (fcc) HEA, and by the still poorly known understanding of dislocations/grain boundaries (GB) interaction.

    Within the 3-years contract, the successful applicant will acquire the necessary knowledge to perform in-situ TEM experiment in a world-class laboratory in this field (CEMES-CNRS, Toulouse). Statistical data on the above mentioned mechanisms will serve to build a database of events, classifying those from the least to the most probable and fuelling data analysis that will be performed in Freiberg.

    Applications should be sent to marc.legros@cemes.fr. Solid basis in materials science and a good knowledge of crystallography are required. The position is opened immediately.

    For futher information, see document attached below:

     

     


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  • The Institute of Metallurgy and Metal Physics (IMM) at RWTH Aachen University is looking for:

    Research Topic: "Grain boundary segregation in magnesium alloys and its role in microstructure and property control."

    Profil: An enthusiastic candidate with excellent background in materials physics, ideally with some experience in magnesium alloys, and:

    - a first degree (M.Sc. or equivalent) in Materials Science, Engineering or Physics

    - an interest in challenging research topics and experimental techniques

    - a very good command of English and German

    - very good communication skills and the ability to work in a team

    For further information or application, please contact Dr.-Ing. Talal Al-Samman, Tel. +49 (0) 241 80 26871, and email: alsamman@imm.rwth-aachen.de. 

    Applications accompanied by supporting documentation in English (Cover letter, CV, certificates, credentials, names and addresses of 2 references) should be submitted by February 23rd , 2018

    More information on the subject, your responsibilities and the contract offer are available in the document below:


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  • The "Nano- / Micromechanics" group in department "Structure and  Nano‐ / and Micromechanics of Materials“, is looking for a postdoctoral researcher (m/f) and a PhD student (m/f) :

    PostDoctoral:

    "Micro cantilever fracture testing of hard coatings with superior fracture properties"

    The work will be focused on in situ experiments applying advanced characterization methods like scanning electron microscopy, focused ion beam milling and high temperature micro fracture testing. Highly motivated candidates should hold a PhD in materials science or physics. Experience in scanning electron microscopy as well as fracture mechanics is appreciated.

    PhD:

    "In situ nano‐ and micromechanics investigating dislocation‐grainboundary interactions"

    The work will be focused on in situ experiments applying advanced characterization methods like synchrotron‐based micro Laue diffraction (μLaue) and scanning electron microscopy (SEM, EBSD, FIB). The PhD candidate will join an internationally recognized and highly motivated team of scientists involved in the field of micromechanics of materials.

    More information are available in the documents below (German and English version) and at www.mpie.de.

    Download « Postdoc_MicroFracture_Mo2BC_2018.pdf »

    Download « PhD_Grainboundaries_2018.pdf »


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  • This is a 12 months Post Doc Position available in METZ.

    More details below.


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