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为了适应近代航空和航天工业的需要,各种新型金属材料在不断的研究和发展,以期取代传统的铝合金。近十多年来,飞速发展的轻金属合金材料是铝锂系合金。金属锂是最轻的金属之一。以锂作为合金元素加入到铝合金中,可以提高合金的弹性模量而降低其比重,同时具有较高的强度和较好的抗蚀性。铍的比重仅次于锂,美国洛克希德导弹和航天公司把铍作为开发新一代超密度铝合金的成分。近年该
In order to meet the needs of modern aviation and aerospace industry, a variety of new metal materials in the continuous research and development, with a view to replacing the traditional aluminum alloy. Over the past decade or so, the rapid development of light metal alloy material is aluminum lithium alloy. Lithium metal is one of the lightest metals. Lithium as an alloying element added to the aluminum alloy, can increase the elastic modulus of the alloy and reduce the proportion, with high strength and good corrosion resistance. Beryllium is second only to lithium, and the U.S. Lockheed missiles and space companies use beryllium as a component in developing a new generation of ultra-dense aluminum alloys. In recent years that