What are the advantages and disadvantages of magnesium alloys?

What are the advantages and disadvantages of magnesium alloys?


Advantages of magnesium alloys

  1. Magnesium alloy has low density, high strength and good rigidity.
  2. Magnesium alloy has good toughness and strong shock absorption. Magnesium alloys are prone to large deformations when subjected to external forces. However, when subjected to impact load, the energy absorbed is 1.5 times that of aluminum, so it is very suitable for parts that should be impacted.
  3. Magnesium alloys have low heat capacity, fast solidification and good die casting performance. Magnesium alloy is a good die casting material, it has good fluidity and rapid solidification rate, can produce parts with fine surface, sharp edges and corners, and can prevent excessive shrinkage to ensure dimensional tolerances.
  4. Magnesium alloys have excellent machinability. Magnesium alloys are the easier to machine of all commonly used metals.
  5. Abundant resources.

Disadvantages of magnesium alloys

  1. Flammability. Magnesium has a great affinity with oxygen, and it can easily react with oxygen in the air when it is in a solid state at high temperature, releasing a lot of heat.
  2. Poor plasticity at room temperature.
  3. Poor corrosion resistance. Magnesium has high chemical activity.

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