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38 Cards in this Set
- Front
- Back
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Non-Ferrous metals?
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They dont have Iron as the base metal.Aluminum,Titanium, and magnesium
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Alluminum is susceptible to?
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Corrosion
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Now modern alloys are controlled by?
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alloying or cladding
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Copper (Cu)
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alloy heat-treatable
poor corrosion resistance |
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Silicon (Si)
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decreases melting point
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Manganese (Mn)
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Prime alloy agent for Non-heat treatable alloys
strenght & good workability |
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Magnesium (Mg)
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good weldability & Corrosion Resistance
5056 alloy most pop.used for rivets. |
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Zinc (Zn)
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coupled with mag= heat treatable alloy
high strength |
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Chromium (Cr)
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Increases Hardness
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What are the Types of codes for Alloy-indentification?
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1000,2000,3000,-7000 series are good in aviation.
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alloy ident. when it comes to 2000-8000 series what do the agents mean?
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1st digit=major alloy agent
2=copper 3=Manganese 4= silicone 5= Magnesium 6=Silicon+Mag 7=Zinc |
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1000 series?
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commercially pure aluminum
high corrosion resistance,thermal and electrical prop. Disadvantage=low strenght |
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3003 is 1100
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low strenght
non structural app. |
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5052(MG &CU)
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used for fuel or oil tanks
rigid fluid lines |
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Copper or Zinc?
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75,000 psi
susceptible to corrosion most pop. 2024,2117 |
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2000-8000 series 2nd, 3rd and 4th digits are?
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2nd=#of controls or mods.
3rd & 4th= specific alloying agents. |
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Annealing does what to metal in a heat-treating process?
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softens it
increases temp "dwell" or "soak" to get temp equal. cool to 500F= 50F p/hr Cool to room temp =any rate |
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annealed state is best for?
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cold working= may be repeated many times over to form.
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Solution Heat-Treating?
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Hardening process
increases strenght |
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process for solution heat-treating is?
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-soak until temp is same throughout material
-Quench to rapidly cool, use water right out of furnace or it could cause corrosion |
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"Age hardening" or "Aging" means?
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soft immediatly after quenching but strenght increases over time.
full strenght=4-5 days |
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Solution heat-treating you Can slow natural aging by?
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storing in temp. 32oF or<
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What is Precipitation Heat-Treating? A.K.A?
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Heat treat process 2nd time to increase strenght
Heat to low temp soak cool in still air -"artificial aging" |
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If soaked too long when PHT could cause?
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"Overage" and decrease strenght
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What main "T" Numbers are used in aviation?
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T6=Solution Heat-treat,artifical aging
T7= Solution Heat-Treat, stabilized to control growth and distortion T8=Solution Heat-Treat, strain hardened, artifially aged. |
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Strain Hardening does what to the material?
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increase strenght & Hardness by coldworking
non-heat treat.= rolling heat treatable=rolled after solution heat treat. |
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Temper Designations?
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Hx2,
4= quarter hard 6= half hard 8=full-hard 9=extra-hard |
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Magnesium (Mg) & its alloys has the best_____ ratio?
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Best strenght-weight ratio when alloyed with Zn,Al,&MN
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Mag and its alloys are used on what of aircraft?
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doors, flaps, skins, tanks,wingtips etc.
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How do you extinguish Magesium & its alloys?
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VERY FLAMMABLE
Dry sand or Dry Powder |
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Titanium & its alloys are good for?
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High Temperatures
strenght and corrosion resis. |
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Titanium/alloys are used for what in aviaton?
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skins, engine firewalls,turbine engine parts & air ducts.
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How do you identify Tit/alloys?
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sim. to stainless steel
mositening & making a mark on glass(pencil) |
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strenght of Tit/alloys?
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800oF
>1000oF= brittle non susceptible to corrosion |
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What are the 3 types of alloys for Titanium? and how is there strenght?
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ALPHA=medium strenght, good temp strenght
ALPHA-BETA=versatile, med. strenght when annealed HIGH STRENGHT- heat treated. BETA=Med. strenght, good forming |
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Nickel& alloys?
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Good weldability & Machinability
Heat treated or cold worked |
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What are the 3 types of alloys for Nickel? used for what?
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Monel=used in gears, parts and exhaust systems
K-Monel=monel+Aluminium Inconel=sim. to stainless steel, used for turbine parts, good strenght/corrosion |
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3 types of Copper & its alloys? what are its uses?
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Brass=alloy+Zn
spring washers,tube fittings Bronze=alloy+ Sn bushings & bearings Beryllium Copper=Most used get up to 200,000 psi strenght, same as brass |
