Welding is used in a number of applications because it is a strong and consistent joining method. However, traditional welding techniques have limitations, such as the ability to join dissimilar metals or shape memory metals. These materials often require alternative joining methods such as crimping or rivets. According to Glenn Daehn, Ph.D., professor of material sciences and engineering at Ohio State University and head of the Impulse Manufacturing Laboratory, impulse welding can meet these challenges and possibly replace a number of other joining methods.
“Impulse welding uses a high- speed collision that essentially scours off the original surfacesand the high pressures of impact creates a bond between the clean surfaces. This impact occurs at speeds up to 1,000 miles per hour,” says Daehn. “With this high-impact method, there is no heat or distortion of the metals, allowing for a joint that is stronger than the original materials.”