Process Technology for Diffusion Welding with Cyclically Pulsative Joining Forces

Abstract

Diffusion welding is a solid-state welding process and is characterised by the process parameters temperature, compression force and process time. Usually, the process force is applied as static load, and high demands with respect to specimen surfaces (low roughness, cleanliness) are common. The aim of this work was to improve the necessary technology for diffusion welding and, above all, to increase the quality of the joints by using cyclically pulsative joining forces to minimise the time or surface-specific conditions, which are typical for this process. For this purpose, a corresponding system technology had to be designed and manufactured. The basis of the system was a modified machine concept for materials testing. As a result, the modified system and the modified process were able to reduce the process time by a factor of 5 to 6 compared to the conventional joining time.