MODULE 1: Introduction to Ultrasonic Testing
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Tips before getting started
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What to expect in this section? (0:44)
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How does sound help us inspect objects? (2:08)
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How does Sound travel? (1:55)
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Why you sound different on a voice recorder?
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Ultrasonic Applications: Railroad
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Ultrasonic Applications: SONAR
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Ultrasonic Applications: Fishing
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Ultrasonic Applications: Levitating Objects
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Responsibilities of Level I, II and III and Qualification vs Certification (4:19)
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SNT-TC-1A Recommendations
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SNT-TC-1A Document (5:52)
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Read Chapter 1
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Summary Lesson 1
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Review
MODULE 2: Basic Principles of Sound
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What to expect in this section? (1:00)
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Modes of Sound Propagation (7:47)
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Modes of Sound Propagation in detail (7:58)
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What is frequency and wavelength? (4:11)
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Velocity, frequency and wavelength equation (3:18)
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Test Your Human Hearing Range
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Blind Guy Echolocation
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What is the relationship between frequency and penetration? (1:50)
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Attenuation (loss of sound) (1:06)
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Acoustical Impedance and Impedance Ratio (3:08)
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Reflection vs Refraction of sound. (5:28)
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Mode Conversion and Critical Angles (6:56)
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Snell's Law Math Problem (8:50)
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QnA Session on Snell's Law with Animation (29:22)
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Calculating Critical Angles using Snell's Law (13:53)
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QnA Session on Critical Angles (19:15)
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Read Chapter 2
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Lesson 2 Summary
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Review
Module 3: Equipment
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What is A-scan, B-scan and C-scan? (2:43)
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Typical UT Flaw detectors (2:18)
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What is Decible?
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Loudness Comparison in Decibels
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Math problems on Decibels and its practical relevance. (7:07)
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Decibels in details (23:19)
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4 types of rectifications (3:45)
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What is Calibration and what are Reference Standards? (1:40)
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What are Area Amplitude Blocks? (3:32)
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What are Distance Amplitude Blocks? (2:24)
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Audio Review of Modules 1 to 3
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Read Chapter 3
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Lesson 3 summary
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Review
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Most important acronym in Ultrasonic Testing (3:02)
Practical Demonstrations
Module 4: About the Transducer
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What to expect in this section? (0:58)
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Piezo-electricity (4:55)
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Piezo-electric Materials (1:44)
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Near zone, Far zone and Dead zone (4:39)
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Three Zones in detail (QnA Session) (23:18)
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Dead Zone Explained
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Beam Spread and its dependence on diameter of the transducer. (2:16)
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Types of transducers (3:22)
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Dual Crystals and the Round Mound of Sound
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How to quickly check wedge contour for Shear Wave transducers
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Resolution and Sensitivity
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Broadband vs Narrowband Transducers
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Gain and Voltage
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How to use powder couplant?
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Couplants (2:14)
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Honey vs Couplant
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UT Thickness without Couplant!
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Noncontact Transducers (5:59)
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Read Chapter 4
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Lesson 4 summary
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Review
Module 5: The different UT techniques
Module 6: Reading Assignment Lesson 1-6
Module 7: Calibrating UT Equipment
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Horizontal linearity, Vertical linearity and Amplitude linearity
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Basic equipment familiarity
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Straight Beam Calibration
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Angle-beam Calibration
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What does a Centerline crack look like in UT?
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6 db Drop Defect Sizing Technique (Incomplete Penetration)
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ERVD Block
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Distance Amplitude Correction (DAC) Curve
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Read Chapter 7
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Lesson 7 Summary
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Review
Module 8: Evaluation of Base Materials
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What is an Ingot?
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What is Continuous Casting?
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UT of Tubes and Bars (4 videos)
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Detection of Laminations (Practical Demo)
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What is Forging? (2 videos)
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Casting Defects
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UT of Iron Castings (Practical Demo)
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What is a Composite?
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What does damage to a composite look like?
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Immersion UT of a Composite
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Stick Welding (or Shielded Metal Arc Welding: SMAW)
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MIG Welding (GMAW)
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TIG Welding (GTAW)
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Flux Cored Arc Welding (FCAW)
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WELDING DEFECTS!! Porosity, Arc Strikes, Undercut
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WELDING DEFECTS!! Incomplete Penetration, Spatter, Excessive Reinforcement
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Stick Welding Defects: Incomplete Fusion, Slag Inclusion, Overlap
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Read Chapter 8
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Lesson 8 Summary
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Review Chapter 8
Practice Tests
Bonus Videos
