Abstract No.:
7152

 Scheduled at:
Thursday, June 23, 2022, Saal Brüssel 12:20 PM
Modeling and simulation


 Title:
Exploration of ternary phase diagrams for the development of novel Fe-based brazing foils

 Authors:
Sophie Vinke* / RWTH Aachen University, Germany
Kirsten Bobzin / RWTH Aachen University/Surface Engineering Institute, Germany
Hendrik Heinemann/ RWTH Aachen University/Surface Engineering Institute, Germany
Julian Hebing/ RWTH Aachen University/Surface Engineering Institute, Germany
Oleg Stryzhyboroda/ Access e.V., Germany

 Abstract:
The complete description of the Fe-Ni-Cr-Si-B system and subsystems can simplify and accelerate the development of Fe-based brazing foils. These Fe-based amorphous brazing foils for joining steel offer considerable advantages over conventionally used filler metals. Amorphous brazing foils are flexible and can be easily adapted to the component geometry with stamping or cutting. Furthermore, Fe-based amorphous brazing foils are much cheaper than the conventionally used Ni-based amorphous brazing foils.
In this study, different alloy systems will be manufactured and analyzed to complete the knowledge of the Fe-Ni-Cr-Si-B system. This allows to create a precise CALPHAD database and thus the identification of quinary Fe-based alloy systems with the highest glass forming ability (GFA). Based on these results, simulations can be used to predict alloy systems with high GFA and suitable compositions. In order to describe the alloying-system Fe Ni-Cr-Si-B completely, the missing data of the ternary systems Fe-Ni-Si and Ni-Cr-B has to be added. This data is obtained experimentally using induction melting followed by metallographic analysis and DSC analysis of the produced specimens. Different phases and melting points of the ternary systems can be identified in this way. Developing these novel Fe-based brazing foils opens up new possibilities for cost effective coating of even complex components due to its good processability. The results will complete the knowledge oft he Fe-Ni-Cr-Si-B system, which ist the essential prerequisite for the advancement of modern Fe-based filler metal.


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