Influence of solid-liquid-reactions in the joint gap on properties of the brazed joint and precision (A05)

• Subject Area: Joining and Separation Technology
• Term: since 2014
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 236616214

Brazing is a crucial joining technology for the most demanding advanced engineering applications. The precision of a brazing process can be defined as the production of a joint with distinct and reproducible mechanical properties by manipulating and varying material and process-related variables. However, the formation of strength-reducing intermetallic phases in the filler metal still represents a great challenge in using Ni-based brazing alloys. In order to braze highly stressed components such as injection and die casting tools, the control of the precision-determining brazing influencing factors, such as the filler metal composition and the diffusion processes, is of central importance for the solidifying filler metal. However, by combining direct current and current pulses with inoculated Ni-based brazing foils, the phase formation in the diffusion brazing process can be completely controlled.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1120: Precision manufacturing by controlling melt dynamics and solidification in production processes
• Applicant Institution: Rheinisch-Westfälische Technische Hochschule Aachen
• Project Head: Professorin Dr.-Ing. Kirsten Bobzin