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Al-Li alloy laser composite welding

In the aerospace manufacturing industry, the application of new materials is increasing, and it also promotes the development of corresponding new welding methods. Laser hybrid welding of aluminum-lithium alloys is one of them.
 
The development trend of modern aircraft structural materials is: vigorously develop high-strength, high-specific modulus, corrosion-resistant, high-tolerance, low-temperature multi-functional structural materials to achieve structural weight reduction; improve materials and structural preparation techniques, reduce manufacturing costs and maintenance costs . Modern body materials are still dominated by aluminum alloys, the amount of steel tends to decrease, and the amount of titanium alloys increases significantly. Aeroengine main materials are aluminum alloys, titanium alloys, high temperature alloys and various types of high temperature composite materials. Aluminum-lithium alloys are the most rapidly developing field in aviation metal materials in the past decade.
 
Aluminum lithium alloy profile
 
Industrial production of aluminum-lithium alloys refers to aluminum alloys containing 1% to 3% of Li with Li as the main strengthening element...
 
According to the distribution of the Airbus A380 (Figure 1), aluminum alloys account for the largest proportion and reach 61% of the weight of the machine body...

Laser hybrid welding technology
 
With the mature application of laser welding technology in the industry, the shortcomings of laser welding technology are also gradually exposed...

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