NDT Method Selector

What is NDT?

To use this method selector consider the material to be inspected together with inspection task to see which method may be appropriate.

• indicates good prospects, o indicates some prospects and Δ poor prospects.

		Acoustic methods general	Acoustic emission	Resonant inspection	Acoustic ranging	Coating thickness measurement	Electromagnetic general
Material	Inspection task	A	A1	A2	A3	C	E
Metal	Surface opening cracks	•	•	•			•
	Surface corrosion pits etc	O		O			•
	Severe corrosion thinning	O		•			O
	Internal cracks	•	O	•
	Porosity	O		O
	Lack-of-fusion defects	•		•
	Internal voids inclusions	O		Δ
	Defect sizing			Δ
	Thickness measurement	•		•			O
	Microstructure variation	•		•			O
	Stress/strain measurement	O		O
	Tube blockages	•	O	O	•
Coated metals	Coating thickness measurement	O		O		•	O
	Coating delamination	•		O			O
	Coating 'pin holes'			Δ			O
Composite materials	Delaminations and disbonds	•	O	•
	Fibre/matrix ratio evaluation	O	O	O
	Incomplete cure of resin	•	O	•
	Internal porosity			Δ
Concrete	Concrete thickness measurement			•
	Reinforcing-bar corrosion		O	O
Ceramics	Surface cracks	O	O	•
	Internal cracks porosity	O	O	O
Any	Assembly verification	•		•
	Sorting	•	•	•		•	O

		Magnetic particle inspection	Magnetic flux leakage methods	Eddy current testing	ACFM	Potential drop flaw detection and sizing	Erosion/ corrosion
Material	Inspection task	E1	E2	E3	E4	E5	EC
Metal	Surface opening cracks	•	•	•	•	•
	Surface corrosion pits etc		•	•	•		•
	Severe corrosion thinning	•	•	O			•
	Internal cracks				O
	Porosity						O
	Lack-of-fusion defects				O
	Internal voids inclusions
	Defect sizing	O			•	•
	Thickness measurement		O	O
	Microstructure variation			O
	Stress/strain measurement				•	•
	Tube blockages			O
Coated metals	Coating thickness measurement			O	O		O
	Coating delamination			O			O
	Coating 'pin holes'			O			O
Composite materials	Delaminations and disbonds
	Fibre/matrix ratio evaluation
	Incomplete cure of resin
	Internal porosity
Concrete	Concrete thickness measurement
	Reinforcing-bar corrosion
Ceramics	Surface cracks
	Internal cracks porosity
Any	Assembly verification
	Sorting		•	O	O

		Leak testing	Liquid penetrant inspection	Optical methods general	Visual inspection	Optical metrology and holography	Laser-based inspection
Material	Inspection task	LE	LP	O	O1	02	O3
Metal	Surface opening cracks	O	•	O	•
	Surface corrosion pits etc		•	O	•	•
	Severe corrosion thinning				•	O
	Internal cracks
	Porosity	O
	Lack-of-fusion defects
	Internal voids inclusions
	Defect sizing				O	O
	Thickness measurement					•
	Microstructure variation				O
	Stress/strain measurement			O		O	•
	Tube blockages	O		•			O
Coated metals	Coating thickness measurement					O
	Coating delamination					O
	Coating 'pin holes'		•		O
Composite materials	Delaminations and disbonds			O	O	O	•
	Fibre/matrix ratio evaluation
	Incomplete cure of resin						•
	Internal porosity
Concrete	Concrete thickness measurement
	Reinforcing-bar corrosion
Ceramics	Surface cracks		•		O
	Internal cracks porosity	O
Any	Assembly verification				•	•
	Sorting

		Thermography	Radiography general	Radioscopy	Neutron radiography	Stress measurement
Material	Inspection task	O4	R	R1	R2	S
Metal	Surface opening cracks		•
	Surface corrosion pits etc		•		O
	Severe corrosion thinning	O	O		O
	Internal cracks		•	•	O
	Porosity		•	•
	Lack-of-fusion defects		•
	Internal voids inclusions		•	•	•
	Defect sizing		O	•
	Thickness measurements	O	•
	Microstructure variation					O
	Stress/strain measurement		O			•
	Tube blockages	•	O
Coated metals	Coating thickness measurement		•		O
	Coating delamination
	Coating 'pin holes'					O
Composite materials	Delaminations and disbonds	O
	Fibre/matrix ratio evaluation
	Incomplete cure of resin
	Internal porosity		•
Concrete	Concrete thickness measurement		•
	Reinforcing-bar corrosion		O	O
Ceramics	Surface cracks		O
	Internal cracks porosity		•
Any	Assembly verification		•		•
	Sorting

		Ultrasonic general	Ultrasonic flaw detection and sizing	Ultrasonic thickness gauging	Ultrasonic advanced methods (TOFD etc)	Other methods
Material	Inspection task	U	U1	U2	U3	Z
Metal	Surface opening cracks	•	•
	Surface corrosion pits etc			O
	Severe corrosion thinning			•
	Internal cracks	•	•		•
	Porosity	•	•
	Lack-of-fusion defects	•	•		•
	Internal voids inclusions	•	O		•
	Defect sizing	•	•		•
	Thickness measurements	•	•	•
	Microstructure variation		O			O
	Stress/strain measurement	O	O
	Tube blockages	•
Coated metals	Coating thickness measurement	O	O	•		•
	Coating delamination	O	•	O
	Coating 'pin holes'
Composite materials	Delaminations and disbonds	•	•	•	•
	Fibre/matrix ratio evaluation
	Incomplete cure of resin	O	O
	Internal porosity
Concrete	Concrete thickness measurement	•	•	•
	Reinforcing-bar corrosion					•
Ceramics	Surface cracks	•	•			O
	Internal cracks porosity	•	•			O
Any	Assembly verification
	Sorting					•