The development of aluminum-lithium alloys can be roughly divided into three stages. In 1924, Germany developed "Scleron", an aluminum alloy containing Li, and Alcoa Aluminum developed X2020 alloy. The former Soviet Union also developed вΑД23 alloy. The second-generation lithium-lithium alloy products include: 01420 alloy developed by the former Soviet Union, 2090 alloy by Alcoa Corporation, and 8090 and 8091 alloys by Alcan Corporation. However, these aluminum-lithium alloys have serious anisotropy, low transverse strength, low level of plastic toughness, and serious loss of toughness after heat exposure.
In view of the disadvantages of aluminum-lithium alloys, researchers have developed a number of new third-generation aluminum-lithium alloys with certain special advantages: Weldalite series alloys, high-toughness 2097, 2197 alloys, C-155 alloys, and Special vacuum treated XT series alloys and high-strength weldable 01460.
In the alloy composition design, the new aluminum-lithium alloy reduces the Li content, increases the Cu content, and adds some new alloying elements Ag, Mn, Zn, etc.; in the performance level, the new aluminum-lithium alloy is higher than the previous aluminum-lithium alloy. All of them have been greatly improved, among which the low anisotropy Al-Li alloy and the high-strength weldable Al-Li alloy have attracted more attention. Due to the excellent properties of Sc-containing aluminum alloys, the addition of Sc to aluminum-lithium alloys has become a development direction for new aluminum-lithium alloys.
LED Tunnel Lights are revolutionizing the way we light up tunnels and other infrastructural landmarks. With their high efficiency and long-lasting durability, LED Tunnel Lights have become a popular lighting option for many infrastructure projects around the world. They provide clear and bright lighting, improving safety and visibility for drivers and pedestrians alike. LED Tunnel Lights come in different variations, including LED Tunnel Mirror and LED Light Tunnel, each designed to provide optimal lighting solutions for tunnels of various sizes and shapes. In this article, we will explore the benefits of LED Tunnel Lights and why they are the preferred choice for tunnel lighting.
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