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l'Institut Jean Lamour invite le Professeur Hani HENEIN ( Department of Chemical and Materials Engineering) de l'Université d'Alberta, Canada, qui donnera un séminaire en Salle 3-012 à l'IJL-ARTEM le vendredi 25 janvier de 14h à 15h, qui est intitulé :
"New Tools for the validation of models in additive manufacturin"
Date et lieu :
Vendredi 25 janvier 2019 à 14h00
Institut Jean Lamour
Additive manufacturing (AM), or 3D printing, is a new manufacturing approach where three-dimensional components are built layer by layer forming a complex 3D part. This manufacturing approach deviates significantly from traditional manufacturing methods. Typically, components are designed and cast followed by heat treatment or hot and cold working and heat treatment. The process is completed with appropriate machining, termed subtractive manufacturing. In AM as applied to metals and metal matrix composites, various forms of raw materials are used whether wire or powder. In this discussion, we will focus on the powder form of raw materials where a liquid pool is formed and solidified. The properties of the alloy, density, gas-liquid surface tension and liquid viscosity, play an important role in the integrity of the liquid pool and the adherence of new deposited layers to previous ones. These properties are often unavailable for many commercial alloys. The Discharge Crucible (DC) method, a new technique, will be described for efficiently measuring these properties of alloys. The limitations of the DC will be discussed. It has been shown that AM processes that solidify a liquid pool are rapid solidification processes that yield metastable microstructures. Models describing these AM processes must therefore predict these out of equilibrium structures. Based on our microstructural analysis of powders and spray deposits, a unifying Solidification Continuous Cooling Temperature diagram (SCCT) has been developed for several alloys. The development of the SCCT will be described as well as the prospects of using it for diagnosing AM processes.
After completing the MEng (thesis) at McGill University (1975) and a PhD at UBC (1981), Hani took up a faculty appointment at Carnegie-Mellon University, Pittsburgh, PA. In 1989, he moved to the University of Alberta actively teaching and doing research on pipeline steels, metal-matrix composites and rapid solidification. He partners with industry in research and has extensive international collaborations. His research is well recognized for a number of seminal contributions in nearly 190 refereed papers, books and book chapters.
Hani formulated an international work abroad program for undergraduates in several high quality engineering programs in Europe and Japan, placing over 100 students since 2002. He formulated in 2011 a Dual Degree Program with the Université de Lorraine. Amongst the distinctions he has received are five best paper awards, the prestigious Killam Research Fellowship, and the Metals Chemistry Award. He has been inducted Fellow of ASM International, CIM and the Canadian Academy of Engineers. In service, Hani plays a leadership role in the profession as the 1998 MetSoc President, Past Editor of CMQ, the 2014 President of TMS and presently the
President-Elect of the American Institute of Mining, Metallurgical and Petroleum Engineers.