NASA NTRS · 19790000094
Ultrasonic grating checks electron-beam welds
Abstract
Remote inspection technique uses reflectance of ultrasonic waves from machined steps in root area of electron beam welds to indicate sound or faulty welds.
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Mitchell, H. A.. 1979-08-01. Ultrasonic grating checks electron-beam welds. https://ntrs.nasa.gov/citations/19790000094
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