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Ultrasonic Testing
MODULE 1: Introduction to Ultrasonic Testing
Tips before getting started
What to expect in this section? (0:44)
How does sound help us inspect objects? (2:08)
How does Sound travel? (1:55)
Why you sound different on a voice recorder?
Ultrasonic Applications: Railroad
Ultrasonic Applications: SONAR
Ultrasonic Applications: Fishing
Ultrasonic Applications: Levitating Objects
Responsibilities of Level I, II and III and Qualification vs Certification (4:19)
SNT-TC-1A Recommendations
SNT-TC-1A Document (5:52)
What is frequency and wavelength? (4:11)
Velocity, frequency and wavelength equation (3:18)
Read Chapter 1
Summary Lesson 1
Review 1
Review 1 Explained (24:34)
MODULE 2: Basic Principles of Sound
What to expect in this section? (1:00)
Modes of Sound Propagation (7:47)
Modes of Sound Propagation in detail (7:58)
What is frequency and wavelength? (4:11)
Velocity, frequency and wavelength equation (3:18)
Test Your Human Hearing Range
Blind Guy Echolocation
What is the relationship between frequency and penetration? (1:50)
Attenuation (loss of sound) (1:06)
Acoustical Impedance and Impedance Ratio (3:08)
Reflection vs Refraction of sound. (5:28)
Mode Conversion and Critical Angles (6:56)
Snell's Law Math Problem (8:50)
QnA Session on Snell's Law with Animation (29:22)
Calculating Critical Angles using Snell's Law (13:53)
QnA Session on Critical Angles (19:15)
Read Chapter 2
Lesson 2 Summary
Review 2
Module 3: Equipment
What is A-scan, B-scan and C-scan? (2:43)
Typical UT Flaw detectors (2:18)
What is Decible?
Loudness Comparison in Decibels
Math problems on Decibels and its practical relevance. (7:07)
Decibels in details (23:19)
4 types of rectifications (3:45)
What is Calibration and what are Reference Standards? (1:40)
What are Area Amplitude Blocks? (3:32)
What are Distance Amplitude Blocks? (2:24)
Most important acronym in Ultrasonic Testing (3:02)
Audio Review of Modules 1 to 3
Read Chapter 3
Lesson 3 summary
Review
Practical Demonstrations
Thickness Calibration with Dakota Ultrasonics DFX-7 (1:48)
How to perform UT thickness calibration using Omniscan SX? (7:09)
Simple tips for using Ultrasonic Pen-Probe
Echo to Echo technique
High Temperature UT Thickness
Module 4: About the Transducer
What to expect in this section? (0:58)
Piezo-electricity (4:55)
Piezo-electric Materials (1:44)
Near zone, Far zone and Dead zone (4:39)
Three Zones in detail (QnA Session) (23:18)
Dead Zone Explained
Beam Spread and its dependence on diameter of the transducer. (2:16)
Types of transducers (3:22)
Dual Crystals and the Round Mound of Sound
How to quickly check wedge contour for Shear Wave transducers
Resolution and Sensitivity
Broadband vs Narrowband Transducers
Damping (2:55)
Gain and Voltage
How to use powder couplant?
Couplants (2:14)
Honey vs Couplant
UT Thickness without Couplant!
Noncontact Transducers (5:59)
Read Chapter 4
Lesson 4 summary
Review 4
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