Crack testing
The crack test describes various methods with which cracks in building or construction elements that are supposed to fulfill a static , dynamic , shielding or mechanical function can be detected and assessed.
Areas of application
The non-destructive crack test is used for quality assurance, mainly on safety-relevant components and components with high consequential costs. The industry is increasingly demanding non-destructive material testing or crack testing on series components as well as individual components in order to guarantee increasing quality standards.
The safety-relevant components include bridges, pressure vessels, pipelines and numerous vehicle parts such as wheel suspensions, axles and parts of the brakes or steering parts on cars, trucks, motorcycles, trains and aircraft. Basically, it is checked where cracks could be present as predetermined breaking points.
Methods
The most common methods of crack testing are:
- Visual inspection ( dye penetrant method )
- Magnetic particle testing (fluxing)
- Eddy current testing
- Ultrasonic testing
- Radiographic examination (X-ray)
- 3D computed tomography
- Digital radiography
- Endoscopy
- Thermography
- Sound test
literature
- Volker Deutsch , Ralf Wagner : Testing for surface cracks using the penetrant method , 1999
- Volker Deutsch: The ultrasonic test , 1999
- Volker Deutsch: The magnetic powder crack test , 2010