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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
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)
Test Your Human Hearing Range
Velocity, frequency and wavelength equation (3:18)
Blind Guy Echolocation
What is the relationship between frequency and penetration? (1:50)
Review
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)
Calculating Critical Angles using Snell's Law (13:53)
QnA Session on Critical Angles (19:15)
QnA Session on Snell's Law with Animation (29:22)
Module 3: Equipment
What is A-scan, B-scan and C-scan? (2:43)
Typical UT Flaw detectors (2:18)
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)
Audio Review of Modules 1 to 3
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
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)
Beam Spread and its dependence on diameter of the transducer. (2:16)
Types of transducers (3:22)
Resolution and Sensitivity
Broadband vs Narrowband Transducers
Gain and Voltage
How to use powder couplant?
Couplants (2:14)
Honey vs Couplant
Noncontact Transducers (5:59)
Review
Module 5: The different UT techniques
What to expect in this section? (1:40)
Pulse-Echo, Pitch-Catch and Through Transmission (5:01)
What is Ultrasonic Immersion Testing (6:39)
Can you answer this Immersion UT question? (2:22)
Wheel Type Immersion UT
Bubbler/Squirter Immersion UT
Review
Review Lesson 5
Module 6: Reading Assignment Lesson 1-6
Read Lesson 1-6
Keys to the quizes
Module 7: Additional useful videos
Most important acronym in Ultrasonic Testing (3:02)
High Pass and Low Pass filters (3:07)
Review Lesson 6
Module 8: Calibrating UT Equipment
Horizontal linearity, Vertical linearity and Amplitude linearity
Basic equipment familiarity
Straight Beam Calibration
Angle-beam Calibration
What does a Centerline crack look like in UT?
6 db Drop Defect Sizing Technique (Incomplete Penetration)
ERVD Block
Distance Amplitude Correction (DAC) Curve
Evaluation of Base Materials
What is an Ingot?
What is Continuous Casting?
UT of Tubes and Bars (4 videos)
Detection of Laminations (Practical Demo)
What is Forging? (2 videos)
Casting Defects
UT of Iron Castings (Practical Demo)
What is a Composite?
What does damage to a composite look like?
Immersion UT of a Composite
Stick Welding (or Shielded Metal Arc Welding: SMAW)
MIG Welding (GMAW)
Module 9: About discontinuities
Relevant and Nonrelevant Indications (4:01)
3 stages of discontinuity detection (2:04)
Advanced UT Theory: Phased Array
What to expect in this section? (1:55)
What do Phased and Array mean? (6:09)
What is S-Scan? (1:41)
Video Demo of PAUT of Composites
Advantages and disadvantages of Phased Array compared to Conventional UT (2:34)
What is encoding? (2:06)
Review
Advanced UT Theory: Time of Flight Diffraction and Guided Wave Testing
TOFD Practical Demo
TOFD Theory and Calibration
TOFD Calibration and Inspection Practical Demo
Practical Demonstration of TOFD
Review
Guided Wave Ultrasonic Testing
Long Range UT (GWUT)
Evaluation Standards
What to expect in this section? (1:31)
Review
Module 10: Bonus Videos
Tips to be a great NDT Technician Part 1 (2:54)
Tips to be a great NDT Technician Part 2 (3:34)
Final Review (45:46)
Practice Tests
UT Practice Test #1
UT Practice Test #1 Explained (44:53)
UT Practice Test #2
UT Practice Test #2 Explained (54:33)
UT Practice Test #3
UT Practice Test #3 Explained (66:33)
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Simple tips for using Ultrasonic Pen-Probe
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