ULTRASONIC TESTING WITH LAMB WAVES

Technical Report · Tue Sep 25 00:00:00 EDT 1956

DOI:https://doi.org/10.2172/4356069· OSTI ID:4356069

Worlton, D C

A method is described whereby many types of flaws lying close to the surface of a metal can be ultrasonically detected, regardless of the time duration of the interrogating pulses. Lamb waves are established in the metal between a flaw and the surface by an ultrasonic beam which impinges at the proper angle of incidence. A suitably positioned receiver transducer picks up the waves to reveal the flaw. In this method the usually troublesome surface echo is eliminated from the receiver by an acoustic barrier, making it well suited for routine and automatic testing. Results of applying the technique to several testing problems are discussed. (auth)

• Research Organization: General Electric Co., Hanford Atomic Products Operation, Richland, Wash.
• Sponsoring Organization: USDOE Office of Environmental Management (EM)
• DOE Contract Number: W-31-109-ENG-52
• NSA Number: NSA-12-000848
• OSTI ID: 4356069
• Report Number(s): HW-45649(Del.)
• Country of Publication: United States
• Language: English

Related Subjects

DEFECTS
DETECTION
ELECTROMAGNETIC WAVES
ENGINEERING
MATERIALS TESTING
METALS
PULSES
SERVOMECHANISMS
SURFACES
TRANSDUCERS
ULTRASONICS