This thesis focuses on the impact of manufacturing parameters on the brazing process. Cases of breakage are particularly notable in the vicinity of the brazed joint and near the shoulder of the saws. Two main reasons for these failures were suspected: the presence of intermetallic compounds in the joint and the presence of residual stress. An investigation was carried out to determine the most influential parameters and plan the initial experiments. Three parameters were selected: brazing temperature, short annealing temperature, and first cooling time.
A first series of experiments defined the different ranges of manufacturing parameters for the study. This series revealed that samples that did not undergo short annealing showed good shear strength results. Two new sets of experiments were designed based on the analysis of the manufactured samples, one with short annealing and the other without.
The experiments were conducted and analyzed. Response surfaces were created to shape the results and perform modeling and optimization. The modeling did not yield a statistically usable mathematical relationship but highlighted that the data collected had noise.
An additional study was conducted to analyze the benefits of short annealing in the thermal cycle of the process. Microstructure, hardness, and residual stress analyses were performed and showed that the difference between samples with and without short annealing was not significant. Therefore, process improvement would involve eliminating short annealing from the cycle. This would result in a significant reduction in manufacturing time while maintaining the mechanical properties of the saws.
| Date | 13 Dec 2023 |
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| Original language | French |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | Mohammad Jahazi (Supervisor) |
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Jego, L. (Author),
Jahazi (Supervisor),
13 Dec 2023Student thesis: Master's thesis › Master in Engineering: Engineering