[Lindsay] has a wonderful writeup about a new toy in the shop, an ultrasonic transducer. The 28kHz, 70W bolt-clamped Langevin transducer by itself is not much use, you need a power supply ...

Small cylindrical parts are often formed through deep drawing — a process by which a punch forms the finished piece from a ...

One bridge in Salt Lake City received an ultrasonic test last month as Utah DOT workers searched for damage. Details here.