-PhD: "Study of elementary deformation mechanisms of multi-component metallic alloys (high-entropy alloys) with a body centered cubic structure."

This thesis is incorporated within the framework of fundamental research on High-Entropy Alloys (HEAs) with a body centered structure (BCC) – new alloys whose name emphasizes their inherent high mixing entropies.

The proposed thesis is dedicated to the study of refractory HEAs with a BCC structure. The main objective of the work is to examine the evolution of mechanical properties of solid solutions Nbx(HfTaTiZr)100-x with x ranging between 20 and 100 (at.%). The proposed strategy would lead to identify the impact of elementary substitutions in the solid solutions on the mechanical behavior of the processes materials. The evolution of underlying deformation mechanisms will be at the center of the study and mainly performed by in-situ Transmission Electron Microscopy (TEM).

Thesis supervision: Jean-Philippe Couzinié (Associate Professor [accredited research director], couzinie@icmpe.cnrs.fr) and Frederic Mompiou (CNRS scientist [accredited research director], frederic.mompiou@cemes.fr).

LSPM research team (CNRS, UPR3407, Paris 13 University) will also be partner of the study under the supervision of Guy Dirras (Professor, dirras@lspm.cnrs.fr).

Desired candidate profile: He or she should demonstrate a solid background in Materials Science with an excellent ranking/level in their Master’s degree.

Beginning of the thesis/funding : 2018, 1st October; Deadline for application: 2018, 31 May.

The thesis will be held at ICMPE in Thiais, near Paris , with long stays at CEMES in Toulouse.

More information available in the document below:

The JRC is offering a post-doc and a trainee  position:

-Post-Doc (24 months): "Exploratory Research Project Novel Micromechanical Testing Methods for the Characterization of Nuclear Materials/μMech."

Description:

The main activity concerns the development of novel micromechanical tests based on the in-situ deformation of metallic membranes produced by microfabrication techniques. The aim of the project is to develop a new methodology, including sample preparation, measurement procedures and data treatment and analysis, for mechanical testing of structural materials for nuclear applications.

The candidate will be in charge of performing micromechanical testing ex-situ (using a nanoindentation set-up) and in-situ (inside a SEM). As well, he/she will be responsible for post-test examinations by electron microscopy, analysing the data and reporting.

More information are available in the following document: « CA_Petten_2018.pdf »

-Trainee (5 months): "Acquisition and analysis of nanoindentation results."

Description:

Nanoindentation is a mechanical testing technique that allows extracting local information of the mechanical properties of materials, such as hardness and elastic modulus. The JRC is involved in several international projects addressed to develop new methodologies for nanoindentation testing in quasi-static and dynamic modes, at room and at high temperatures. In this context, we are looking for a trainee to assist in the operation of nanoindentation equipment to set-up experiments, program and launch data acquisition matrices. The candidate will also be requested to perform post-processing of data, prepare data analysis reports and store the data in a materials database. A significant amount of work will be carried out in the laboratory followed by statistical analysis.The trainee could be an undergraduate/master student or a PhD student who would like to do a stay. 

More information are available in the following document:  « Trainee Petten_2018.pdf »

Scope and Topics:

The school will address all the current topics of the GDRi Mecano:

Mechanics of nano-objects:

Size effect on stress and strain, Strain mapping and engineering, Fatigue, Brittle to ductile transition, Defect nucleation and propagation, Structural/interfacial stability, …

Format:

The school will start Sunday Oct 28^th, evening and will end Friday Nov 2^nd, noon.

Classes will be given in the morning. An afternoon break will take place from 14:00 to 17:00. Short lectures (20 min) on advance topics will be given before and eventually after dinner.  A call for abstract will be sent in March (submission March-June) for these talks and posters. A poster session/café will take place Thursday afternoon. An additional poster session may be organized depending on the number of posters.

Important deadlines:

- March 15th – Web site opening

- March 20th – June 20th – Call for abstracts

- July 14th – (Bastille Day) – Publication of the preliminary school schedule

Confirmed lecturers, Accomodation, transportation and registration/fees are describe at the following adress: https://mecano2018.sciencesconf.org/

Conference description:

Tailoring the mechanical performance and reliability of materials requires to understand the interplay of deformation mechanisms and microstructure across all length scales. The recent advances in small-scale mechanical testing complemented by in-situ microscopy and diffraction techniques, microstructure characterization methods ranging from atomistic insights to 3-dimensional tomography as well as simulation methods bridging the scales from atomistic to continuum provide access to all relevant length scales for designing and optimizing materials and material systems. The 2018 Gordon Conference on "Thin Film and Small Scale Mechanical Behavior" will be the platform to discuss progress and limitations of experimental and computational nano- and micromechanical methods, current understanding of deformation, fatigue and fracture mechanisms with a focus on small length scales, and to exchange ideas on interlinking different approaches to enhance the mechanical properties of thin films, coatings and bulk materials. Newest developments in testing methods, lab on chip concepts, exposure to environmental conditions as well as modeling approaches will be a central part of the meeting.

Applications for this meeting must be submitted by June 17, 2018.

Program conference is fully describe at the following adress: https://www.grc.org/thin-film-and-small-scale-mechanical-behavior-conference/2018/

The Max-Planck-Institut für Eisenforschung GmbH (MPIE), located in Düsseldorf, Germany, is dedicated to basic research on advanced materials. The Department Structure and Nanomechanics of Materials (Prof. G. Dehm) is searching for an experienced researcher to become Group Leader (TVÖD 13-14) for the Thin Film & Nanostructured Material Synthesis Facilities.

The candidate has obtained a PhD in physics/chemistry/materials science and expertise in at least one of the following fields: Magnetron sputtering, thin film evaporation, molecular beam epitaxy, multilayer growth, microstructure analyses, material properties.

The position is intended for 5 years. The candidate is expected to perform cutting-edge research in the field of nanostructured materials or thin film materials science, and to establish and lead a research group in this field. This includes taking care of the physical vapor deposition activities and supervising students and postdocs in this research area.

Applicants should send resume, publication list, a one page research plan, and recommendation references to bewerbungskennziff.4020@mpie.de .

Deadline for the application is 2 May 2018.

More information available in the document below: