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| Abstract No.: |
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Scheduled at:
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Thursday, June 23, 2022, Saal Brüssel 12:00 PM
Modeling and simulation
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| Title: |
Increasing the manucaturing tolerance of high-temperature brazed components by thermodynamic calculation of temperature-time-cyles
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| Authors: |
Jonas Maiß* / Hochschule Niederrhein, Germany
Oliver Stahn / Technische Universität Berlin, Germany
Johannes Wilden/ Hochschule Niederrhein, Germany
Wolfgang H. Müller/ Technische Universität Berlin, Germany
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| Abstract: |
During high-temperature brazing-processes of gaps wider than 50 micrometers the undesired formation of brittle phases can occur. Depending on their amount brittle phases result in decreased mechanical properties of the joint. In the case of nickel-base-filler material brittle phases are mostly formed by elements like silicon, phosphorus or boron, which are added to decrease the melting point of the brazing material. By calculating the diffusion time of these specific elements as a function of the process temperature, process-cycles can be optimized to prevent the formation of brittle phases. This leads to an increase in the mechanical properties of the joint, which can reach up to the values of the basematerials. This approach works for joints with similar and dissimilar basematerials. It is also possible to calculate the amount of brittle phases that can be tolerated without interfering with the mechanical properties. By this the machanical properties can be optimized with regard to the cost-efficiency of the process.
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