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Genre/Form: | Thèses et écrits académiques |
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Material Type: | Document, Thesis/dissertation |
Document Type: | Computer File |
All Authors / Contributors: |
Hasnaa Meliani; Michaël Fontaine, meÌcanique des mateÌriaux).; Mohamed Assoul; Alexandre Gilbin; Hédi Hamdi; Guillaume Fromentin; Denis Mazuyer; Georg Wälder; Yannick Robichon; Université Bourgogne Franche-Comté.; École doctorale Sciences pour l'ingénieur et microtechniques (Besançon / Dijon) (Belfort).; Université de Franche-Comté. |
OCLC Number: | 1240764880 |
Notes: | Titre provenant de l'écran-titre. |
Description: | 1 online resource |
Responsibility: | Hasnaa Meliani ; sous la direction de Michaël Fontaine et de Mohamed Assoul et de Alexandre Gilbin. |
Abstract:
Tool wear is a major issue which compromises productivity and the ability of manufacturing high quality components. The main objective of this thesis is to improve the lifetime of coated or non-coated tools made of tungsten carbide and intended for stainless steel and aluminum machining. The functionalization method used in this work is surface structuring by femtosecond laser.At first, experimental study is conducted to investigate the interaction between femtosecond laser and tungsten carbide material. For the first time, all laser-matter parameters for generating ripples or athermal ablation structures on tungsten carbide is determined.Several structures at different dimensional scales are produced and tested on a closed-type tribometer. The purpose is to study tribological performances, both friction and wear, using structured surfaces in wet environment and to compare them to a reference surface. Wettability of structured surfaces is also measured and corresponding surface energies are determined.In the second experimental part, machining tests are conducted with various structured tools in orthogonal cutting and longitudinal turning configurations. A panel of structures is tested in order to identify the best geometrical structure which improves cutting tool performance.This study clearly shows the role of surface functionalization via femtosecond laser structuring in improving the lifetime of cutting tools by 30% in some cases.
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