Dissertation/ Thesis
Investigation into the effects of thermomechanical fatigue on the evolution of the microstructure and the plasticity of SAC solder joints ; Investigation de l'évolution de la microstructure et de la plasticité des joints de brasure SAC sous effets du vieillissement thermomécanique
| العنوان: | Investigation into the effects of thermomechanical fatigue on the evolution of the microstructure and the plasticity of SAC solder joints ; Investigation de l'évolution de la microstructure et de la plasticité des joints de brasure SAC sous effets du vieillissement thermomécanique |
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| المؤلفون: | Khoury, Georges |
| المساهمون: | Laboratoire de l'intégration, du matériau au système (IMS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Université de Bordeaux, Université de Sherbrooke (Québec, Canada), Hélène Fremont, Julien Sylvestre, Alexandrine Guédon-Gracia |
| المصدر: | https://theses.hal.science/tel-03053708 ; Electronique. Université de Bordeaux; Université de Sherbrooke (Québec, Canada), 2020. Français. ⟨NNT : 2020BORD0124⟩. |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2020 |
| المجموعة: | Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
| مصطلحات موضوعية: | SAC, Lead-free solder, Microstructure, Fatigue, Aging, Visco-plasticity, Plasticity, Reliability, Thermal cycling, Isothermal storage, Brasure sans plomb, Vieillissement, Visco-plasticité, Plasticité, Fiabilité, Cyclage thermique, Stockage isotherme, [SPI.TRON]Engineering Sciences [physics]/Electronics |
| الوصف: | Nowadays, SAC alloys are widely used as soldering materials. The SAC solder joints have a dynamic microstructure which evolve excessively under different aging conditions. The characteristic of visco-plasticity of the SAC being extremely sensitive to its microstructure complicates the evaluation and the estimation of the life expectancy of the joints.This work is aimed at improving the predictions of SAC solder joints reliability by contributing to expand knowledge on the evolution of the microstructure and the mechanical characteristic of visco-plasticity of SAC. This work consists in studying separately the evolution of microstructure and plasticity under the effect of aging.The study of the microstructure allowed the gain of new knowledge on the coarsening under different aging conditions. This study also allowed the evaluation of the hypothesis of linear damage accumulation on the microstructural analysis basis and on the basis of a thermal cycle with all the different conditions that it presents.The study of plasticity allowed the assessment of the effect of aging by thermal cycling on the mechanical strength of the SAC. This study also allowed the evaluation of the effect of not taking into account the evolution of the mechanical characteristic of plasticity on the estimation of the life expectancy of the solder joints using finite element simulations. ; Actuellement, les alliages SAC sont largement utilisés en tant que matériaux de brasure. Les joints de brasure SAC présentent une microstructure dynamique et qui évoluent excessivement sous différentes conditions de vieillissement. La caractéristique de visco-plasticité du SAC étant extrêmement sensible de sa microstructure complique l’évaluation et l’estimation de l’espérance de vie des joints.Ce travail s’adresse à l’amélioration des prédictions de la fiabilité des joints de brasure SAC en contribuant à la compréhension de l’évolution de la microstructure et de la caractéristique mécanique de visco-plasticité du SAC. Ce travail consiste à étudier ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | French |
| Relation: | NNT: 2020BORD0124; tel-03053708; https://theses.hal.science/tel-03053708; https://theses.hal.science/tel-03053708/document; https://theses.hal.science/tel-03053708/file/KHOURY_GEORGES_2020.pdf |
| الاتاحة: | https://theses.hal.science/tel-03053708 https://theses.hal.science/tel-03053708/document https://theses.hal.science/tel-03053708/file/KHOURY_GEORGES_2020.pdf |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.F0C02862 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |