The dye penetrant method of inspection is a nondestructive test for defects open to the surface. It may be used on such materials as aluminum, magnesium, brass, copper, cast iron, steel, stainless steel, carbides, stellite, certain plastics and ceramics.
First, a little history. The alternating current field measurement (ACFM) nondestructive testing technique was developed in the ‘80s to detect and estimate penetration depth of fatigue cracks in underwater welded tubular intersections of offshore oil platforms.
Computed radiography, a form of X-ray imaging, has been embraced widely by many major manufacturing companies. Its application is now core for testing within a range of sectors including aerospace, oil and gas, industrial gas turbines, medical implants and prosthetics.
Additive manufacturing (AM) is one of the hottest and most revolutionary processes to come along in many years. The thought of popping a design into a machine and having a functional part come out the other side was science fiction a generation ago. We are nowhere near the Star Trek replicators, but we are closing that gap.
Each day, facilities across the globe turn to nondestructive testing (NDT) to verify the reliability of parts or materials without causing damage. One of the most popular of these methods is magnetic particle inspection (MPI)—a form of NDT that uses magnetism to detect surface and near-surface defects, cracks, seams or stress points in ferromagnetic materials before parts and materials are placed into service.
A major milestone in Digital NDT was reached this February— the American Society for Testing and Materials (ASTM) E07.11 subcommittee published the new ASTM standard E3147-18 on DICONDE Interoperability. This new standard should help further establish DICONDE in Digital NDT environments and increase the benefits of its use.
On April 20, three days after a Southwest Airlines Boeing 737-700 experienced an engine failure due to a fractured fan blade, resulting in the death of a passenger, the U.S. Federal Aviation Administration issued an emergency airworthiness directive that requires operators of CFM56-7B engines with more than 30,000 flight cycles to perform a one-time ultrasonic inspection of all 24 fan blades to detect cracking.
The importance of nondestructive testing training cannot be overstated. What nondestructive testing technicians do every day has a huge impact on the lives around them. Well trained and qualified technicians provide accurate results for prevention of failures in components or structures.