Time and place: 2018.11.7, 10:00 am, Wuhan National High Magnetic Field Center B206

Presenter: Glenn S. Daehn

Title: Impulse Welding and Manufacturing: Methods and Opportunities

Abstract：

Explosive-like impulse can do remarkable things. Impact welding, for example can produce very strong welds between wildly dissimilar metals in a solid-state process, avoiding the intermetallic compounds that often cause brittleness, and melting that can destroy microstructure and strength. Explosive forming can dramatically extend forming limits and can avoid presses and fixed dies. This presentation will discuss many ways that explosive-like methods can be used in conventional lab or factory environments. While these methods can offer vastly different pressure-time profiles with pressures ranging to GPa and time scales to tens of nanoseconds, all these methods offer opportunities very light equipment and enable new phenomena that can enable new methods of joining, forming, cutting and surface treatment.

After a brief, but broad introduction to impulse manufacturing, we focus on the use of the new methods of the vaporizing foil technique and laser impulse methods to enable solid-state welding. Modeling and simulation will be synthesized with experimental macroscopic and microstructural information. Efforts to further commercialize these methods will also be discussed.