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Design Tech > Non Ferrous Metals & Alloys > Flashcards

Non Ferrous Metals & Alloys Flashcards

1
Q

Advantages of Aluminium

A
  • relatively inexpensive
  • corrosion resistant
  • easily coloured by anodization
  • conducts electricity
  • when polished, highly reflective
    ductile & malleable
  • impermeable
  • odourless
  • not magnetic
  • good strength to weight ratio
  • easy recycled
  • lightweight
  • abundant - readily available in different stock forms
  • easy to work, casts well, low(ish) melting point
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2
Q

Disadvantages of Aluminium

A
  • difficult to weld
  • painting processes do not bond well - specialised paints must be used/ must be anodized - added expenses
  • not INCREDIBLY strong
  • not hard (scratches easily)
  • can crack under stress
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3
Q

Advantages of Duralumin

A
  • lightweight
  • very strong
  • malleable
  • ductile
  • tough
  • high resistance to stress and cracking
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4
Q

Disadvantages of Duralumin

A
  • copper alloy - NOT corrosion resistant
  • strength can be easily lost during welding
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5
Q

Advantages of Zinc

A
  • easily worked
  • corrosion resistant
  • improves casting in alloys (more fluid and reduces MP) - makes casting CHEAPER
  • casts well
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6
Q

Disadvantages of Zinc

A

Brittle

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7
Q

Advantages of Brass

A
  • corrosion resistant
  • harder than copper
  • malleable
  • ductile
  • good conductor of heat & electricity
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8
Q

Disadvantages of Brass

A
  • scratches easily
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9
Q

Advantages of Silver

A
  • malleable
  • ductile
  • conducts heat & electricity
  • when polished, highly reflective
  • anti bacterial
  • dense - heavy for its volume - difficult to counterfeit
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10
Q

Disadvantages of Silver

A
  • dense
  • soft & scratches easily
  • often alloyed with copper
  • EXPENSIVE
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11
Q

Advantages of Bronze

A
  • harder & tougher than brass
  • corrosion resistant
  • casts well
  • malleable
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12
Q

Disadvantages of Bronze

A
  • very soft
  • scratches easily
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13
Q

Advantages of Copper

A
  • good conductor of electricity
  • malleable & ductile
  • will eventually corrode
  • tough - not easy to break by impact force
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14
Q

Disadvantages of Copper

A
  • poor tensile strength
  • expensive compared to other metals
  • scratches easily
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15
Q

Advantages of Pewter

A
  • malleable
  • easily fusible with other metals
  • non corrosive
  • resists tarnishing
  • considered non toxic in food manufacture
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16
Q

Disadvantages of Pewter

A
  • soft & NOT hardwearing
  • lower MP
  • lower strength
  • tin is expensive to mine and extract - fairly expensive alloy

Design Tech (17 decks)

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