Magnesium alloys and aluminum alloys are two common metal materials that differ in their composition, properties, and applications. The following is a detailed comparative analysis of magnesium alloys and aluminum alloys.
1. Composition differences
1.Magnesium alloy: Magnesium alloy is an alloy composed of magnesium as the basic element and other elements such as aluminum, zinc, manganese, and copper. Among them, the content of magnesium is usually more than 90%, and the content of other elements is low.
2.Aluminum alloy: Aluminum alloy is an alloy composed of aluminum as the basic element and other elements such as copper, magnesium, zinc, and silicon. The composition of aluminum alloys is more complex, and the elements and contents of different series of aluminum alloys are different.
2. Performance differences
1.Density: Magnesium alloys have a lower density of about 17g cm, while aluminum alloy has a higher density, about 27g/cm³。Therefore, magnesium alloys have advantages in terms of weight and are suitable for applications with high requirements for light weight.
2.Strength: Magnesium alloy has lower strength, but has better shock absorption properties; Aluminum alloy has high strength and good tensile, compressive and wear resistance.
3.Corrosion resistance: Magnesium alloys have poor corrosion resistance and are susceptible to oxidation and corrosion; The corrosion resistance of aluminum alloy is good, especially after adding copper, zinc and other elements, its corrosion resistance is improved.
4.Processability: The machinability of magnesium alloy is poor, and it is easy to generate heat during cutting, resulting in tool wear; Aluminum alloy has good machinability and is easy to cut and form.
5.Environmental protection: magnesium alloy has a high value, and toxic gases will be produced when burned; Aluminum alloys have a lower value, but they do not produce toxic gases when burned.
3. Application differences
1.Magnesium alloy: Magnesium alloy is widely used in automobiles, aviation, 3C products and other fields, such as automobile engine blocks, mobile phone shells, etc. In addition, magnesium alloys are also used in medical equipment, building structures, etc.
2.Aluminum alloy: Aluminum alloy is widely used in construction, automobiles, rail transit, packaging and other fields, such as building doors and windows, automobile wheels, beverage cans, etc. In addition, aluminum alloys are also used in home appliances, electronic equipment, etc.
Magnesium alloys and aluminum alloys have many differences in composition, properties, and applications. When choosing metal materials, various factors should be considered comprehensively according to actual needs to achieve the best use effect.