Investigation of the effect of rapidly solidified braze ribbons on the microstructure of brazed joints

19th Chemnitz Seminar on Materials Engineering – 19. Werkstofftechnisches Kolloquium

Bobzin, K.^1 ; Öte, M.^1 ; Wiesner, S.^1 ; Rochala, P.^1 ; Mayer, J.^2 ; Aretz, A.^2 ; Iskandar, R.^2 ; Schwedt, A.^2

Surface Engineering Institute, RWTH Aachen University, Kackertstraße 15, Aachen

52056, Germany^1

Central Facility for Electron Microscopy, RWTH Aachen University, Ahornstraße 55, Aachen

52074, Germany^2

关键词: Brazing process;    Geometric precision;    Melting and solidification;    Melting behavior;    Phase formations;    Process parameters;    Rapidly solidified;    Time-dependent diffusion;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/181/1/012006/pdf
DOI  :  10.1088/1757-899X/181/1/012006

来源: IOP

【 摘 要 】

Shrinkage and warpage due to melting and solidification are crucial for the geometric precision of related components. In order to assure a high geometric precision, the formation of the microstructure in the joint during brazing must be taken into consideration. An extensive interaction can occur between liquid melt and base material, resulting in the formation of distinctive phases. This interaction depends on the parameters of the brazing process. However, the consequences of the interaction between phase formation and process parameters in terms of geometric precision cannot be estimated yet. Insufficient quality of the joint can be a result. In this study, investigations focus on the process of solidification in terms of time dependent diffusion behavior of elements. Therefore, microcrystalline and amorphous braze ribbons based on Ti are produced by rapid solidification and are used for joining. The microstructure of the braze ribbons as well as the melting behavior and phase formation during brazing are considered to be of particular importance for the mechanical properties of the brazed components.