PT- discontinuity Flashcards
FORGING PROCESS:
Locate in (Flat Plate) Flattening and lengthening of porosity, inclusion , and pipe found in parent metal.
Where is it located?
Lamination
location: Subsurface (visually in edges of Plate)
FORGING PROCESS:
located in (Bar Stock) Flattening and lengthening of Inclusions found In Parent Metal.
Where is it Located?
Stringers. SUBSURFACE
Location: visually detected at ends of bar.
FORGING PROCESS:
located in (BAR STOCK) Flattening and Lengthening of Gas Pockets and Pipe in parent metal.
Where is it Located?
Pipe. Subsurface
location. Visually detected at the end of bar.
FORGING PROCESS:
located (BARSTOCK)
Lengthening of surface cracks or irregularities on the surface of parent metal.
Where is it Located?
Seams.
visually detected on surface
FORGING PROCESS
located: (Die Mismatch)
Fin of metal being folded back and pressed into forged surface.
Where is it Located?
Forging.Laps.
location: Surface of forging is usually at die parting line, visually detected
FORGING PROCESS
located: (Die Design)
Flow of metal folds back on itself due to improper die design.
Forging Laps.
LOCATION: surface of forging at abrupt changes of section, visually detected.
FORGING PROCESS
Rupture of metal due to forging at improper temperatures.
Where is it Located?
Forging bursts.
LOCATION: May be internal or external. External will be visually detected.
casting Discontinuity
Foreign material contained in molten cast material.
Where is it Located?
Nonmetallic Inclusions.
location: generally Subsurface may appear at surface.
casting Discontinuity
Metallic in nature not elements of casting.
Where is it Located?
Metallic Inclusion.
location: subsurface
casting Discontinuity
Voids caused by gas bubbles trapped in casting material as it solidifies.
Where is it Located?
Porosity.
location: Surface or Subsurface.
casting Discontinuity
Stresses set up in casting material as it solidifies.
Where is it Located?
Hot Tears and Shrinkage Cracks.
Location: Surface at abrupt changes in cross section.
casting Discontinuity
Rupture of the last metal to solidify in a casting
Where is it Located?
Shrinkage Cavities
Location: Subsurface
casting Discontinuity
Premature stoppage of molten metal in the gate area.
Where is it Located?
Micro-Shrinkage.
Subsurface.
