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�����Engineering Materials

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LUCY MOHAPATRA

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ASST. PROFESSOR

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Materials

  • Over 70,000 different kinds and grades of engineering materials
  • This number grows daily
  • 1,000 different materials

make up an

automobile

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The Three Basics:

  • Metals

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  • Polymers
    • Composites

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  • Ceramics

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Metal

  • Cast Iron
  • Steel
    • Mild steel, medium carbon steel, high carbon steel
  • Specialty steel
    • Stainless (tin plated or galvanized)
  • Alloys (two or more pure metals)
    • Steel= iron & carbon
    • Brass= copper & zinc
    • Bronze= copper & tin

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Polymers

  • Natural
    • Animal cellulose

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  • Synthetic-
    • Thermoplastics
    • Thermosets

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Natural Composites

  • Hardwood
    • Deciduous Trees

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  • Softwood
    • Coniferous

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Ceramics

  • Clay based
    • Structural clay-tile, brick
    • Porcelain
  • Refractories
    • Heat resistant (fire bricks)
  • Glasses
  • Inorganic cements

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Hardwoods

  • Ash
  • Beech
  • Birch
  • Cherry
  • Mahogany
  • Maple
  • Oak
  • Poplar
  • walnut

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Softwoods

  • Cedar
  • Cypress
  • Fir
  • Pine
  • Redwood
  • Spruce

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Manufactured Wood

  • Particle Board
    • flake board, particle board

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  • Laminar
    • plywood, laminated beams

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Lumber Facts