Alexis Nicolaÿ

Research Engineer in 3D microstructure analysis at Mines Paris
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Contact Information
us****@****om
(386) 825-5501
Location
Greater Nice Metropolitan Area, FR
Languages
  • Français Native or bilingual proficiency
  • Anglais Professional working proficiency
  • Italien Elementary proficiency

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Experience

    • France
    • Higher Education
    • 300 - 400 Employee
    • Research Engineer in 3D microstructure analysis
      • Oct 2019 - Present

      Scientific part: - Implementation of measurements and of three-dimensional microstructure analysis, as well as the monitoring of these microstructures during "in-situ" heat treatments. - Development of data acquisition and analysis procedures and, when necessary, development of new experimental devices. - Development of new post-processing tools according to the scientific objectives of each project, and if necessary, their interfacing with numerical simulations. Technical… Show more Scientific part: - Implementation of measurements and of three-dimensional microstructure analysis, as well as the monitoring of these microstructures during "in-situ" heat treatments. - Development of data acquisition and analysis procedures and, when necessary, development of new experimental devices. - Development of new post-processing tools according to the scientific objectives of each project, and if necessary, their interfacing with numerical simulations. Technical part: - Ensure the technical responsibility of a dual beam microscope (Plasma FIB-SEM) equipped with a heat treatment chamber recently acquired at CEMEF and its accessories (EDS spectrometer and EBSD detectors). - Ensure the maintenance of these equipments at their highest level of performance in conjunction with manufacturers. - Ensure the compatibility and relevance of the data acquired when they are associated to the development of models for numerical simulation of microstructural evolutions during forming. Management of people / projects parts: - Participate in the development of research themes in the field of microstructure evolutions during forming in collaboration with various CEMEF research teams. - Ensure the co-supervision of student-researchers or post-docs by participating in the definition of tests, measurements and identification of parameters for quantitative analysis of microstructures. - Develop my own collaborative network. Education and training part: - Ensure the training of student-researchers (trainees, masters, specialized masters, doctoral students) as part of their course. - Participate in continuing education activities on these techniques (training, conferences, exhibitions, etc.). Show less Scientific part: - Implementation of measurements and of three-dimensional microstructure analysis, as well as the monitoring of these microstructures during "in-situ" heat treatments. - Development of data acquisition and analysis procedures and, when necessary, development of new experimental devices. - Development of new post-processing tools according to the scientific objectives of each project, and if necessary, their interfacing with numerical simulations. Technical… Show more Scientific part: - Implementation of measurements and of three-dimensional microstructure analysis, as well as the monitoring of these microstructures during "in-situ" heat treatments. - Development of data acquisition and analysis procedures and, when necessary, development of new experimental devices. - Development of new post-processing tools according to the scientific objectives of each project, and if necessary, their interfacing with numerical simulations. Technical part: - Ensure the technical responsibility of a dual beam microscope (Plasma FIB-SEM) equipped with a heat treatment chamber recently acquired at CEMEF and its accessories (EDS spectrometer and EBSD detectors). - Ensure the maintenance of these equipments at their highest level of performance in conjunction with manufacturers. - Ensure the compatibility and relevance of the data acquired when they are associated to the development of models for numerical simulation of microstructural evolutions during forming. Management of people / projects parts: - Participate in the development of research themes in the field of microstructure evolutions during forming in collaboration with various CEMEF research teams. - Ensure the co-supervision of student-researchers or post-docs by participating in the definition of tests, measurements and identification of parameters for quantitative analysis of microstructures. - Develop my own collaborative network. Education and training part: - Ensure the training of student-researchers (trainees, masters, specialized masters, doctoral students) as part of their course. - Participate in continuing education activities on these techniques (training, conferences, exhibitions, etc.). Show less

    • France
    • Aviation and Aerospace Component Manufacturing
    • 700 & Above Employee
    • PHD student in material sciences
      • Oct 2016 - Oct 2019

      PhD subject: Microstructures and mechanical properties of screw press forged Nickel-based superalloys. The main purpose of this PhD is to better understand links between forging conditions, obtained microstructures, and resulting mechanical properties on operating parts. The focus is set on the impact of the forging strain rate. To do so, thermomechanical testings have been conducted to reproduce forging conditions which allows to characterized Microstructural evolutions occuring… Show more PhD subject: Microstructures and mechanical properties of screw press forged Nickel-based superalloys. The main purpose of this PhD is to better understand links between forging conditions, obtained microstructures, and resulting mechanical properties on operating parts. The focus is set on the impact of the forging strain rate. To do so, thermomechanical testings have been conducted to reproduce forging conditions which allows to characterized Microstructural evolutions occuring during forging processes. Main technics: - SEM (Scanning Electron Microscopy) observations - EDS (Energy Dispersive X-ray Spectrometry) and EBSD (Electron Back Scattered Diffraction) analyses - Nano-indentation in AFM (Atomic Force Microscopy) Then the impact of produced microstructures on mechanical properties have been characterized and microstructural features driving mechanical behaviour have been identified after microstructural observations: - Creep tests - Tensile tests - Fatigue tests This PHD work is run in the context of the Opale project. Show less PhD subject: Microstructures and mechanical properties of screw press forged Nickel-based superalloys. The main purpose of this PhD is to better understand links between forging conditions, obtained microstructures, and resulting mechanical properties on operating parts. The focus is set on the impact of the forging strain rate. To do so, thermomechanical testings have been conducted to reproduce forging conditions which allows to characterized Microstructural evolutions occuring… Show more PhD subject: Microstructures and mechanical properties of screw press forged Nickel-based superalloys. The main purpose of this PhD is to better understand links between forging conditions, obtained microstructures, and resulting mechanical properties on operating parts. The focus is set on the impact of the forging strain rate. To do so, thermomechanical testings have been conducted to reproduce forging conditions which allows to characterized Microstructural evolutions occuring during forging processes. Main technics: - SEM (Scanning Electron Microscopy) observations - EDS (Energy Dispersive X-ray Spectrometry) and EBSD (Electron Back Scattered Diffraction) analyses - Nano-indentation in AFM (Atomic Force Microscopy) Then the impact of produced microstructures on mechanical properties have been characterized and microstructural features driving mechanical behaviour have been identified after microstructural observations: - Creep tests - Tensile tests - Fatigue tests This PHD work is run in the context of the Opale project. Show less

    • France
    • Higher Education
    • 300 - 400 Employee
    • Research Engineer
      • May 2016 - Oct 2016

      Study and analyses of AGG (Anormal Grain Growth) conditions of appearance during the processing of a Nickel-based superalloy used for aeronautic parts. - Thermomechanical testing in the range of Industrial conditions - Test analyses and identification of thermomecanical conditions leading to Abnormal Grain Growth - Identification of microstructural mechanisms responsible of Abnormal Grain Growth Study and analyses of AGG (Anormal Grain Growth) conditions of appearance during the processing of a Nickel-based superalloy used for aeronautic parts. - Thermomechanical testing in the range of Industrial conditions - Test analyses and identification of thermomecanical conditions leading to Abnormal Grain Growth - Identification of microstructural mechanisms responsible of Abnormal Grain Growth

    • France
    • Machinery Manufacturing
    • 100 - 200 Employee
    • Research and Development Engineer - Internship
      • Sep 2015 - Mar 2016

      HLE steel characterization (main mechanical properties, fatigue, microstructure) in different work-hardening states provideed by a particular forming process. The main purpose is to provide inputs for computational models of a part. HLE steel characterization (main mechanical properties, fatigue, microstructure) in different work-hardening states provideed by a particular forming process. The main purpose is to provide inputs for computational models of a part.

  • MECAPLAST Group
    • Villers-Bretonneux
    • Assistant Mechanical Engineer - Internship
      • Feb 2014 - Aug 2014

      - Optimisation du processus de découpe des éléments filtrants pour moteurs. - Recherche et mise en place d'un système permettant une découpe au pli prés des éléments filtrants. - Identification des causes et fréquences de défauts lors de la dépose de polyuréthane (PU) sur les éléments filtrants, et recherche de solutions. - Mise en place d'un démoulant à eau lors de la dépose de PU. - Optimisation du processus de découpe des éléments filtrants pour moteurs. - Recherche et mise en place d'un système permettant une découpe au pli prés des éléments filtrants. - Identification des causes et fréquences de défauts lors de la dépose de polyuréthane (PU) sur les éléments filtrants, et recherche de solutions. - Mise en place d'un démoulant à eau lors de la dépose de PU.

    • Professeur
      • Feb 2013 - Jul 2013

      - Dons de cours particuliers du niveau 6ème à terminale en Maths, Physique et Chimie. - 6h/semaine - Dons de cours particuliers du niveau 6ème à terminale en Maths, Physique et Chimie. - 6h/semaine

Education

  • MINES ParisTech
    Doctor of Philosophy (PhD), Sciences des matériaux
    2016 - 2019
  • Université de Technologie de Compiègne (UTC)
    Ingénieur mécanique, Sciences des matériaux et innovations technologiques
    2011 - 2016

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