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Zorluk: OrtaAlloys: Classification, Compositions, Physical Properties, and Uses

Aircraft structural components require materials that combine low density with high tensile strength. Which of the following alloys, composed predominantly of aluminium along with copper, magnesium, and manganese, is extensively used in aircraft construction because it is significantly stronger than pure aluminium?

  1. DuraluminCevap
  2. B
    Magnalium
  3. C
    Alnico
  4. D
    Solder

Cevap

Duralumin is the aluminium alloy composed of aluminium, copper, magnesium, and manganese used in aircraft construction.
Duralumin is composed of aluminium (95%95\%), copper (4%4\%), magnesium (0.5%0.5\%), and manganese (0.5%0.5\%). Adding these elements to aluminium alters the crystal lattice and enhances its hardness and tensile strength without significantly increasing its density, making it ideal for aircraft bodies.

Adım Adım Çözüm

1
Identify the required material properties from the question prompt.
The target material must be a light, high-tensile-strength aluminium alloy used in aircraft construction.
Aircraft construction requires low-density materials to minimize weight while maintaining structural integrity under stress.
2
Analyze the elemental composition specified in the prompt (Al+Cu+Mg+MnAl + Cu + Mg + Mn).
Aluminium combined with small percentages of copper (4%4\%), magnesium (0.5%0.5\%), and manganese (0.5%0.5\%) forms Duralumin.
Alloying pure aluminium with these transition and main-group elements creates lattice distortions that prevent dislocation movement, dramatically increasing tensile strength.
3
Match the composition and applications to the correct alloy name.
Duralumin is the correct choice.
Magnalium lacks copper/manganese reinforcement for heavy structural framing, Alnico is a magnetic alloy, and Solder is a tin-lead joining alloy.

Anahtar Kavram

Composition, properties, and applications of aluminium alloys (Duralumin)
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Konular

Alloys: Classification, Compositions, Physical Properties, and Uses

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