Introduction to NDE Ultrasonic Systems

Introduction to NDE UltrasonicSystems

Learning Objectives

familiarity with:ultrasonic system componentsultrasonic NDE terminology

basic information on transducersconstructiontypes

common ultrasonic displays

flaw

cabling cabling

Pulser Receiver

flaw signal

Ultrasonic System Components

vi(t)vR(t)

input voltageoutput voltage

transducer(transmitter)

transducer(receiving)

component beinginspected

MODEL 5072PR PULSER-RECEIVER

Pulser/Receiver

Pulse-echo

Pitch-catch

Common ultrasonic testing configurations

Through- transmission

Common ultrasonic testing configurations

Digital Oscilloscope

back surface reflection

flaw signal

main "bang" signal

oscilloscope display

Ultrasonic Signals

Ultrasonic A-Scan

Portable Flaw Detectors

caseelectrical network

backing

crystal

wear plate

connector

electrodes

Ultrasonic System Components

Contact Transducer

search tube

quarter wave plate

Ultrasonic System Components

Immersion Transducer

Immersionscanningsystem

Ultrasonic System Components

Focused Transducer

acoustic lens

Ultrasonic B-Scan

x

back surface

z

B-scan display

20 MHz B-Scan of a composite,showing laminates

Ultrasonic C-Scantransducer scan pattern

x

y

z

C-scan image of chem-milled panels athorizontal lap splice / vertical butt spliceon a 727 fuselage

C-scan image of an IC assembly

B-scan of the same assembly

Ultrasonic System Components

References

Krautkramer, J. and H. Krautkramer, Ultrasonic Testing of Materials, Springer Verlag, 1990.

Blitz, J. and G. Simpson, Ultrasonic Methods ofNon-destructive Testing, Chapman & Hall, London,UK,1996.