Pauline Delroisse, Dr
graduated as mechanical engineer at Université Catholique de Louvain (UCLouvain - Belgium) in 2014. She is working under the supervision of Pr. Aude Simar on a PhD thesis related to additive manufacturing which is the continuity of her master thesis. The main objective of this work is to process and optimize new lightweight architectured structures using selective laser melting (SLM). These structures are made of aluminium alloy (AlSi10Mg) and characterized in terms of microstructure (influence of the process parameters, porosity,..) and mechanical properties (impact resistance, tensile and compressive behaviors). Her work is in support of the increasing interest of the aeronautical and aerospatial industries in this new manufacturing technology.
Chunjie Huang, Dr
received a Ph. D degree in Jan. 2018 from the Lab. of ICB-Lermps of Université Bourgogne-Franche-Comté (UBFC) in France. His research interests are cold spray (CS), friction stir processing (FSP) and selective laser melting (SLM).
In June 2018, he started a post-doctoral stay in iMMC under the supervision of Prof. Aude Simar funded by an ERC Starting Grant. The topic of his research is the crack propagation of FSPed Al 7075 alloy and the healing of SLMed Al alloys.
Norberto Jimenez Mena, Dr
graduated as a mechanical engineer at the University Carlos III of Madrid, Spain, in 2013. He started his PhD thesis in September 2013 under the supervision of Prof. Aude Simar and Prof. Pascal Jacques and funded by a FRIA grant. His thesis aims at understanding and optimizing dissimilar welds of aluminium to steel by means of a novel Friction Melt Bonding (FMB) process. Currently, the transport industry lacks of reliable methods to join these two materials due to their metallurgical and physical incompatibilities. In FMB, developed and patented at the UCLouvain, the bonding is formed by a reaction of liquid aluminium and solid steel to form a continuous intermetallic layer. The strength of the weld is mainly determined by the composition and shape of the intermetallic and the presence of solidification defects. The goal is to identify the role of the thermomechanical cycles in the intermetallic and defect formation to find an optimum that maximises the strength using finite element modelling, diffusion kinetics calculations, specific toughness testing.
Matthieu Marteleur, Dr, Senior scientist - Frature of steels and xxx
Alvise Miotti Bettanini, Dr, Senior scientist
discussed his PhD in April 2019. He worked under the supervision of Prof. Pascal J. Jacques and Prof. Laurent Delannay on the development of a high strength martensitic stainless steels for innovative automotive structural applications. He is now working at the Materials and Processing Engineering (IMAP) department within the ENTROTOUGH framework. This project, funded by the Wallonie Region, promotes the development of high toughness alloys for cryogenic applications like LNG (Liquified Natural Gas) pressure vessels. The CALPHAD method, which allows the predictions of phase stability and phase transformation in a metallic system using computational thermodynamics, drives the experimental effort, thus hastening the development cycle of new Fe-based superalloy with enhanced toughness at low temperature.
Juan Guillermo Santos Macias
is doing a PhD thesis under the joint supervision of Pr. Pascal Jacques and Pr. Aude Simar. This project aims at improving the mechanical behaviour of additive manufactured parts through a friction stir processing (FSP) surface mechanical treatment. This post-processing method significantly enhance ductility and is expected to also enhance fatigue resistance. Fatigue is a critical phenomenon in many applications, e.g. structural parts in the aerospace industry. More specifically, this research is focused on studying the effect of FSP on the microstructure (porosity and second phase size and spatial distribution) and mechanical behaviour (residual stresses and fatigue) of selective laser melting AlSi10Mg parts. Furthermore, in order to define an adequate FSP patterning strategy, the project will also feature an analysis of the influence of processing parameters through a chained thermal and microstructural model.
Thaneshan Sapanathan, Dr, Chargé de recherche FNRS
completed a mechanical engineering degree and a PhD at Monash University (Australia) in 2010 and 2014, respectively. His thesis was entitled "Fabrication of axi-symmetric hybrid materials using combination of shear and pressure". During his PhD, he worked on architectured hybrid materials fabrication using severe plastic deformation (SPD) processes. Two novel axi-symmetric SPD techniques were investigated to fabricate hybrid materials with concurrent grain refinements. After that, he started a research project at University of Technology of Compiègne (France) in which he investigated the weldability window for similar and dissimilar material combinations using numerical simulations for magnetic pulse welding. He also studied the interfacial phenomena, behavior of material under high strain rate deformation, modeling and simulation of the magnetic pulse welding/forming. Currently, he is working as a postdoctoral research fellow at UCLouvain on the topic of characterizations of aluminium to steel welds made by friction stir welds and friction melt bonding. In particular, he will study the residual stresses and effect of intermetallic distribution on the mechanical properties of these welds.
Lv Zhao, Dr, Postdoctoral researcher
completed his Master and PhD degrees in Institut National des Sciences Appliquées de Lyon in 2013 and 2016. His PhD work addressed the fracture behavior of solar grade monocrystalline and multi-crystalline silicon wafers, in which a couple of innovative experimental techniques have been elaborated and new results highlighted. He is now working for the ERC Starting Grant ALUFIX as a post-doc fellow with Professor Aude Simar. He is particularly interested in the crack propagation in aluminum alloys in the presence of local residual stresses induced by healing agents such as shape memory alloy particles. His work encompasses an experimental part in which metal matrix composites (MMCs) will be fabricated by friction stir processing, and a numerical part in which cohesive zone method will be applied to address the crack path within the MMCs in the framework of finite element modeling.