Engr_Metals_NonFerrous

Engr_Metals_NonFerrous - MEGR 2180 Engineering Metals:...

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MEGR 2180 Engineering Metals: ge e g e t a s Aluminum and other Nonferrous Metals
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MEGR 2180
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MEGR 2180 onferrous Metals Nonferrous Metals • Aluminum • Copper agnesium Magnesium • Tungsten olybdenum Molybdenum • Titanium ickel • Nickel • Cobalt
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MEGR 2180 i alloy fan Turbo jet Engine – 38% titanium Ti alloy fan Ti or Ni alloy high Pressure compressor Ni alloy combustion chamber – 37% nickel – 12% chromium % cobalt 6% cobalt – 5% aluminum – 1% columbium 1% other Turbine exhaust Inlet case Al alloy Case Ni alloy
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MEGR 2180 volution of Materials Used in Evolution of Materials Used in Gas Turbines http://www.azom.com/details.asp?ArticleID=109
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MEGR 2180 luminum Alloys Aluminum Alloys
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MEGR 2180 luminum Aluminum • Use of Aluminum is second only to iron and steel • Al is the most abundant metal in the earth’s crust (third most abundant element) • Significance of Aluminum is – Outstanding strength to weight ratio – Outstanding stiffness to weight ratio – Corrosion resistance – East of processing ase of recycling – Ease of recycling
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MEGR 2180 luminum Aluminum •I n got • Wrought products – Rolled •P la te • Sheet oil • Foil – Forged – Extruded • Cast products
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MEGR 2180 rought aluminum alloys are identified by Wrought aluminum alloys are identified by 4 digits and a temper designation • First digit is the major alloying element • 1xxx—commercially pure – 1050 indicates a minimum of 99.5% Al – 1090 indicates _______% Al 0xx— e second digit indicated modification of the alloy x0xx the second digit indicated modification of the alloy – If the second digit is zero, it indicates the original alloy; integers 1 through 9, which are assigned consecutively, indicate alloy odification modification • xx00—the third and fourth digits identify the alloy and have no numerical significance
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MEGR 2180 Designations for Wrought Aluminum Alloys 1xxx Pure Excellent corrosion resistance, high electrical and thermal conductivity, good workability, low strength, not heat treatable. 2xxx Copper High strength-to-weight ratio, low resistance to corrosion, heat treatable. 3xxx Manganese Good workability, moderate strength, generally not heat treatable. 4xxx Silicon Lower melting point, forms dark-gray to charcoal oxide film, generally not heat-treatable 5xxx Magnesium Good corrosion resistance and weldability, moderate to high strength, not heat-treatable. 6xxx Magnesium nd Silicon Medium strength; good formability, machinability, weldability, and orrosion resistance; heat treatable and Silicon corrosion resistance; heat treatable 7xxx Zinc moderate to very high strength, heat treatable. 8xxx Other First digit is the major alloying element, the second digit indicated modification of the alloy, the third and fourth digits identify the alloy and ave no numerical significance have no numerical significance
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MEGR 2180 irst digit is the major alloying element Cast Aluminum Alloys First digit is the major alloying element • 100.x—the second and third digits indicate the minimum
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Engr_Metals_NonFerrous - MEGR 2180 Engineering Metals:...

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