Non-Destructive Testing (NDT) Physics in Heavy Industry: Phased-Array Ultrasonic Testing (PAUT), Time-of-Flight Diffraction (TOFD), Eddy Current, Radiography, and Acoustic Emission

Deep End Era. Engineering with Sankalp · Oct 29, 2026 · 1h 8m

When a fifty-millimetre-thick steel weld or a spinning titanium jet-engine disk cannot be cut open to check if it is sound, engineers rely on elastic stress waves, electromagnetic eddy currents, and gamma photons. We build industrial Non-Destructive Testing (NDT) from first principles: ultrasonic mode conversion, Phased-Array delay laws, Full Matrix Capture, Maurice Silk's Time-of-Flight Diffraction (TOFD), eddy-current skin depth, industrial radiography, and acoustic emission.

Chapters

00:00:00 Opening: The Invisible Seam Inside Fifty Millimetres of Steel

00:04:36 Elastic Waves in Solids…