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How do you work harden a piece of metal?
By cold working
Whats the difference between thermosetting and thermoplastic resin?
Thermosetting resin doesn't soften when heated and chars or burns rather than melting, thermoplastic resin becomes soft and pliable when heated and hardens when cooled.
What are thermoplastic and thermosetting resins commonly used in modern aircraft?
Thermoplastic resins are commonly used on windshields and windows.
Thermosetting resins are most often used in composite structures.
Name one of the types of resin commonly used as a matrix material for aircraft composite laminates?
Polyester resin or epoxy resin.
What are some of the materials that are commonly used as the reinforcing component in a composite structure?
Fiberglass, kevlar, carbon, linen, and paper.
What are the reasons that alloy steel that is responsive to heat treatment is usually less suitable for welding?
It may become brittle and lose its ductility in the area of the weld.
What are the advantages of pre impregnated materials.
1 pre preg fabrics contain the correct amount of matrix.
2 the matrix material evenly and completely permeates the reinforcing fibers.
3 the matrix has the resin and hardener in the correct proportions.
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