Lecture 9 Flashcards
What are the four types of testing?
- Destructive testing
- Proof testing
- Hardness testing
- Nondestructive testing
What is proof testing?
Product is subjected to a load or pressure of some known and determined magnitude to simulate product life.
Hardness testing can only test for
Surface strength
NDT can:
- Detect internal or surface flaws
- Measure a product’s dimensions
- determine a material’s structure or chemistry
- Evaluate a material’s physical or mechanical properties
What three things are necessary for NDT?
- Some means of probing the material
- A sensor to detect the response
- A way to interpret and evaluate quality
By what are limited the NDT testing methods?
Type, size and orientation of flaws
MPI can only be used on XXX materials
Ferromagnetic
Eddy-Current testing can only be used on XXX materials.
Conductive
For ultrasonic inspection, what extra layer of material must be used?
An accoustic coupling medium (oil or water).
What are the three types of ultrasonic inspection?
- Pulse-echo (single or dual transducer)
- Through-transmission (Flaws decrease the amplitude of the signal)
- Resonance testing
What is resonance testing used for?
Determine the thickness of a plate/sheet. Good for composites.
What is accoustic emission monitoring good for?
Continual in-service monitoring.
