Materials in process Flashcards
Describe the steps for a dye, penetrant inspection
The surface is cleaned. The penetrate is applied in allowed to dwell for specified time, the penetrant is removed with an emulsifier or cleaner, dye the part and apply the developer inspect defects
Name some tools that are commonly used to assist in making visual inspections of welds
Magnifying glass, flashlight mirror, and possibly a borescope
What are some of the nondestructive testing methods that may be used on aluminum components
Visual dye penetrant eddy, current ultrasonic, testing and radiography
Which nondestructive testing method can be performed without removing the surface coatings such as primer, paint, anodized films, and is effective in detecting surface and sub surface corrosion
Eddy current inspection method
What process occurs during the penetration stage of a dye penetrant inspection when the penetrating liquid is applied, and then removed from a cracked part
The pitcher enters the crack by capillary action, and remains there, until made visible by the developer
Name the different types of hardness tester, used on steel and other alloys such as aluminum
Rockwell, brinnell in Barcol
Which steel alloy is noted for its toughness, and is most commonly used for aircraft tubular structure, such as frame, members, engine, mounts, landing gear, parts, and other structural parts
Chromalloy , chrome-molybdenum steel
A correctly made, butt weld will have what bead with and how much penetration
The bead width should be 3 to 5 times the thickness of the base metal, and there must be 100% penetration
What are the characteristics of a cold weld
A cold world has rough, irregular edges that are not feathered into the base material and has variations in penetration amounts
The penetration of a fillet weld should be what percentage of the thickness of the base metal
25 to 50%
What is the term used that applies to the group of metals that has iron as its principle constituent
Ferrous
Describe the basic steps for conduction, a magnetic particle inspection
Magnetized the part, then coat the surface with ferromagnetic particles, if a defect, or discontinuity is present, the particles align with the discontinuity, forming a visible pattern
What is indicated by the markings on the heads of a solid shank rivet
The material that they are made of, and indirectly their strength
How can you keep heat treated aluminum alloy rivet soft enough to install after quenching process
If the rivets are stored in a freezer, they will remain soft for several days
What is the grip length of a bolt?
From the bottom of the boat head to where the threads start, the length of the unthreaded portion of the bolt
What does the grip length of a bolt correspond to?
The thickness of the material being fastened with the bolt
In what way are AN standard steel bolts identified
By the code markings on the bolt heads
What is the difference between a close tolerance, bolt, and a general purpose bolt?
Close tolerance bolts are machine to more accurate dimensions
When referring to a standard torque chart, how can a 1/4 x 28 size bolt be defined
It is a 1/4 inch diameter bolt with a thread count of 28 threads per inch
The diameter of AN standard steel bolt as in the part number AN3-5 is measured in what fractional increment
1/16th of an inch the AN3 is a 3/16” diameter bolt
What are the basic types of washers?
Plain,lock, special
What hardware is used as a threaded bushing to repair threads
Helicoil
For what types of applications are self locking nuts allowed
Self locking nuts may not be used when either the bolt or the nut is subject to rotation
If the maintenance procedures don’t specify a torque value for a bolt or nut how can you determine the proper values?
Consult a standard torque table, such as the one and AC43.13–1B
