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AirCraft Structural

A and P Class

QuestionAnswer
Wrought Objects Physically forming into a shape
Cast Items Pouring Molton metal into a mold
3 type of metal working Hot Working, Cold Working, Extruding
Hot Working Forming metal at elevated tempatures by Rolling or Forging
Rolling metal Forming metal with rollers to form
Forging Form shapes by pressing or hammering
Cold Working Performed well below metal critical tempature. Strains the metal, it increases it's strength and hardness. Ductility decreases.
Extrusion Process of forcing metal through an opening of a die. Metal takes shape through the die opening.
Carbon Steel Carbon is in steel that allows the steel to be heat treated to obtain varying degrees hardness, strength, and thoughness.
Nickal Steel Combination of Nickal and Carbon.Increase of hardness, tensile strength, and elastisity limit without decreasing ductility.
Nickal is A cheap ingrideant of stainless steel.
Non-Ferrous Metal Metals which have elements other than Iron as their base.
Aluminum Rank high in its resistance to corrosion
Aluminum Alloys Most widely used metals in modern aircraft construction. Vital because of its high strength-to-weight ratio and ease of fabrication.
Alloy Designation Wrought Alluminum and alloys are identified by 4 digit index system.
Alloy designation II 1st digit designation identifies major alloy elements used in the formation of the alloy.
Non-heat-treatable alloys Pure aluminum does not benefit from heat treatment since there are no Alloying materials in the structure.
Hardness designation Hardness or temper is indicated by a letter designation that is seperated from the alloy designation by a DASH
Heat Treatment identification Heat Treatable alloys have their hardness condition designation by the Letter T
Alclad Aluminum Light weight and high strength, Excellent corrosion resistance.
Copper and its Alloys Not used as structural material, excellent thermal and electrical conductivity.
Magnesium and its alloys One of the lighest materials, sufficent working strength and suitable working characteristices for air craft struture. BAD - very difficult to extinguish.
Heat treatment - Quenching Media, 3 types Brine- most severe, water, oil - the least severe
Tempering Reduces hardness and britleness, relieves stress and improves steel ductibility and toughness.
Annealing softens metal and decreases internal stress
Normaling Removes interanl stress by heart treatment, wilding, casting, forming, or machining
Case Harding Produces a hard wear-resistant surface or case over a strong, though core.
Nitriding Accomplished with minumem distrotion becasue of the low tempature which parts are case hardened and because of zero quenching is required after exposure to the Ammonia gas.
Carbonizing Forms a thin layer of high carbon steel on the exterior of low carbon steel.
Heat treatment of nonferrous metal 2 types Solution and Precepitation heat treatment
Strain Hardening Both heat treatable and non-heat treatable aluminum alloys can be stregthened and hardened through strain harding. Cold working and Work hardening.
Hardnes testing, 2 types Brinell and Rockwell
Created by: smitha3407