Top 5 Non-Destructive Testing Methods Safeguarding the Aerospace and Defence Industry


“According to BIS Research, the global non-destructive testing services in the aerospace and defence market are estimated to reach $1.81 billion in 2033 from $1.29 billion in 2022, at a CAGR of 3.34% during the forecast period 2023–2033.”


The aerospace and defence industry heavily relies on the utmost safety and reliability of its components. Non-destructive testing (NDT) plays a crucial role in ensuring these standards are met by detecting flaws and defects in materials and components without causing any damage. Here are the top 5 NDT methods safeguarding the aerospace and defence industry.


  1. Ultrasonic Testing (UT): UT involves the use of high-frequency sound waves to penetrate materials and bounce back when they come across a crack or void. This type of testing is idealfor detecting internal defects in materials components.


  1. Radiographic Testing (RT): RT uses X-rays or gamma rays to create an image of the internal structure of a material. This method is beneficial in detecting internal defects such as cracks, corrosion, and other discontinuities that may not be visible to the naked eye. 

This type of testing is commonly used to inspect vital components such as aircraft engines or missile guidance systems, subject to extreme operating conditions.


  1. Eddy Current Testing (ECT): ECT uses electromagnetic fields to detect the surface of the material being tested. The aerospace and defence industry uses this type of testing to inspect aircraft and missile components such as landing gear, engine parts, and fuselage. These components are made of conductive materials such as aluminium, titanium, and steel, ideal for eddy current testing.


  1. Magnetic Particle Testing (MT): MT is a cost-effective method for detecting surface-breaking defects like cracks, seams, and porosity in ferromagnetic materials such as iron, nickel, and cobalt.

This method is commonly used in the aerospace and defence industries to inspect aircraft and missile components, such as landing gear, engine parts, and fuselage.



  1. Liquid Penetrant Testing (PT): Penetrant testing or liquid penetrant inspection (LPI) detects surface-breaking defects in various materials, such as metals, plastics, ceramics, and composites, by applying a liquid penetrant to the surface.

The excess penetrant is removed, and a developer is applied, causing the penetrant in the defects to become visible to the inspector.

With non-destructive testing (NDT) techniques becoming increasingly efficient and cost-effective, these methods are brightening the future potential of NDT especially in the aerospace and defence industries.


By employing these NDT methods, the aerospace and defence industry can ensure the structural integrity and safety of critical components, ultimately safeguarding lives and missions.


To learn more about the important role in the Non-Destructive Testing industry, contact the experts at RiskCON today.

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