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NDT-RAM Systems Selection Guide
Home > NDT > What is Non-Destructive Testing?

What is Non-Destructive Testing?

Types of Non-Destructive Testing (NDT) and Non-Destructive Inspection

Non-Destructive Testing (NDT) is the examination of an object or material with technology that does not affect its future usefulness. NDT techniques do not harm or destroy the object under test. NDT can provide an excellent balance of quality control and cost-effectiveness without affecting manufacturing yield.

The term "NDT" includes many methods that can:
· Detect internal or external defects
· Determine structure, composition or material properties
· Measure geometric characteristics

NDT can and should be used in any phase of a product's design and manufacturing process, including materials selection, research and development, quality assurance and production. 

Non-Destructive Testing is also known as Non-Destructive Evaluation (NDE) or Non-Destructive Inspection (NDI).

Different Types of NDT Methods

  • Resonant Inspection (RI)
  • Radiography X-ray (RT)
  • Computed Tomography (CT)
  • Magnetic Particle Testing (MT)
  • Ultrasonic Testing (UT)
  • Electromagnetic Eddy Current (ET)
  • Acoustic Emission Testing (AE)
  • Liquid Penetrant Testing (PT)
  • Optical Testing
  • Visual Inspection

Traditional NDT Technique Comparison

Excellent Excellent Fair Fair Poor Poor
Cracks/Chips/Voids Excellent Excellent Excellent Excellent Fair
Material Properties Excellent Poor Poor Poor Fair
Missed Operations Excellent Poor Poor Poor Poor
Structural Integrity Excellent Excellent Excellent Excellent Excellent
Product Lot Variation Fair Fair Excellent Excellent Excellent
Defect Location
Surface (External) Excellent Excellent Excellent Excellent Poor
Internal Excellent Poor Poor Excellent Excellent
Brazing/Bonding/Welding Excellent Poor Poor Fair Fair
Throughput Excellent Fair Fair Excellent Poor
Training/Certification  Excellent Poor Poor Poor Poor
Total Inspection Costs Excellent Fair Fair Poor Poor
Automation Capacity
Quantitative Results Excellent Poor Poor Fair Poor
Ease of Automation Excellent Fair Fair Poor Poor
Cost of Automation Excellent  Fair Fair Poor Poor Poor

NDT-RAM™ is short for Nondestructive Testing Resonant Acoustic Method. NDT-RAM is Resonant Inspection (RI) for nondestructive detection of structural differences in parts.

Industries that benefit from NDT-RAM:

Manufacturers that benefit from NDT-RAM:

Learn More
Resonant Acoustic Method
How the Equipment Works
Measurement and Detection Principles
Advantages of NDT-RAM™
Case Studies
Comparison of Non-Destructive Methods
Resonant Inspection Technical Paper Archive

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