Types of Non- destructive testing
There are several types of non-destructive testing (NDT) methods, such as
- Visual inspection
- Radiographic testing
- Ultrasonic testing
- Magnetic particle testing
- Eddy current testing
- Liquid penetrant testing
- Acoustic emission testing
- Thermography
- Leak testing
- Tomography
- Shearography
- Holography
- Neutron Radiography
- Capillary Leak Test
- Laser Shearography
- X-ray Fluorescence (XRF)
- Acoustic Emission (AE)
- X-ray Diffraction (XRD)
Visual inspection: This method involves visually examining the surface of a material or object for defects or damage.
Radiographic testing: This method uses X-rays or gamma rays to create an image of the internal structure of a material or object.
Ultrasonic testing: This method uses high-frequency sound waves to detect internal defects or measure the thickness of a material.
Magnetic particle testing: This method uses a magnetic field to detect surface or near-surface defects in ferromagnetic materials.
Eddy current testing: This method uses an induced electrical current to detect surface or near-surface defects in conductive materials.
Liquid penetrant testing: This method involves applying a liquid to the surface of a material and then removing it, leaving any defects visible.
Acoustic emission testing: This method uses sensors to detect and locate the source of any sound generated by defects or damage in a material.
Thermography: This method uses infrared radiation to detect temperature variations in a material, which can indicate the presence of defects.
Leak testing: This method uses various techniques to detect leaks in a material or object, such as pressure testing, vacuum testing or using tracer gas.
Tomography: This method uses X-rays or ultrasound to create a cross-sectional image of a material or object, allowing for the detection of internal defects.
Shearography: This method uses a laser to measure the surface deformation of a material, which can indicate the presence of internal defects.
Holography: This method uses laser beams to create a three-dimensional image of an object, which can be used to detect surface and internal defects.
Neutron Radiography: This method uses a neutron beam to create a radiographic image of an object, which can be used to detect internal defects, particularly in thick and dense materials.
Capillary Leak Test: This method uses a liquid medium to detect leaks in sealed systems by observing the rise of liquid in a tube.
Laser Shearography: This method uses laser beams to create a shearographic image of an object, which can be used to detect surface and internal defects.
X-ray Fluorescence (XRF): This method uses X-rays to excite the atoms in a material and measure the energy emitted, which can be used to identify the composition and detect any surface contamination.
Acoustic Emission (AE): This method uses sensors to detect and locate the source of any sound generated by defects or damage in a material, in real-time.
X-ray Diffraction (XRD): This method uses X-rays to measure the diffraction pattern of a material, which can be used to identify the crystal structure and detect any defects or impurities.