Laser/Emat Systems for the Ultrasonic Inspection of Aluminum
The metals manufacturing industry makes routine use of ultrasonic nondestructive testing techniques for the detection of defects such as cracking. It is becoming increasingly clear, however, that more advanced non-contact techniques are required for the testing of materials which are either in motion or at an elevated temperature. An example is in the continuous casting of aluminum, where differential cooling across the material can lead to stresses which, in turn, can result in porosity or cracks. In this case, an on-line defect detection system is desirable, to detect the onset of manufacturing problems. Hence, the aim is not to detect all defects, but to give an indication of problems in the solidification process.
KeywordsRayleigh Wave Velocity Waveform Thermoelastic Generation Ultrasonic Generation Ultrasonic Inspection
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