(8) Flashcards
1
Q
Three basic steps of interpreting radiographs:
A
- detection
- interpretation
- evaluation
2
Q
Detection
A
- knowledge of expected discontinuities
- experience
- viewing conditions
3
Q
Interpretation
A
Judging an indication as to its cause and nature
4
Q
Evaluation
A
will the discontinuity have an effect on the intended use of the part?
- use of standards, codes and specifications
5
Q
Types of discontinuities
A
- Inherent
- Processing
- Welding
- In-service
6
Q
Inherent Discontinuities
A
metal going from liquid to solid
7
Q
Processing Discontinuities
A
from primary processing (rolling, drawing, extruding, forging)
from secondary processing (heat treat, machining, grinding, plating, etching)
8
Q
Welding Discontinuities
A
From the joining of two surfaces by heat and pressure.
9
Q
In-Service Discontinuities
A
Direct result of continued use of over-use of the part.
10
Q
Inherent Casting Discontinuity examples
A
- shrinkage
- shrinkage cavities
- porosity/blowholes
- inclusions
- crack and hot tears
11
Q
Welding Discontinuity examples
A
- porosity
- slag
- incomplete penetration
- undercut
- incomplete fusion
- cracks
12
Q
Inclusion categories
A
- slag
- oxide
- tungsten
