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Aircraft manufacturing and technology
Published in Lucy Budd, Stephen Ison, Air Transport Management, 2020
Since 2005, the commercial aircraft industry has begun to use aluminium-lithium alloys in their new aircraft programmes as the cost and availability of this material has improved. However, there is a limit to the application of aluminium-lithium material on large commercial jet aircraft, and metal is still required on the leading edges of the wing and the engine pylons for reasons of bird strikes and fire protection. Although composites are now widely used on wide-body aircraft, composites do not yet downscale for single-aisle fuselage applications.
Non-ferrous metals
Published in Ash Ahmed, John Sturges, Materials Science in Construction: An Introduction, 2014
Aluminium has an FCC crystal structure, thus its ductility is retained even at very low temperatures. Aluminium can be alloyed with lithium to further enhance its properties. These materials have lower densities (2,500–2,600 kg m–3) in comparison to other metals, especially ferrous alloys, high-specific moduli (elastic modulus–specific gravity ratios), and excellent fatigue and low temperature toughness properties. Aluminium–lithium alloys are mainly utilised in the aerospace industry.
Influences of Sc(NO3)3 on characteristics of micro-arc oxidation coatings
Published in Surface Engineering, 2023
Shaolan Yang, Ping Wang, Jiwei Liu
Aluminium-lithium alloy has been employed in aerospace fields, including aircraft fuselage skin and beams, which depend on its high strength, high modulus of elasticity, as well as low density [1,2]. Nevertheless, aluminium-lithium alloy is easily corroded by Cl−, H+ and other corrosion medium, due to the active lithium element, causing corrosion hazards such as pitting and intergranular corrosion, which restricts the application expansion of aluminium-lithium alloy in aerospace [3,4]. The corrosion resistance of aluminium-lithium alloy can be enhanced by surface-treatment technologies, including anodizing [5], shot peening [6] and MAO [7]. Compared with conventional anodizing and shot peening, MAO technique has become a research hotspot because of its simple process, environmental-friendly and excellent corrosion resistance of its products.
Effect of the thermal–strain cycle of friction stir welding on the formation of the structure of welded joints in V-1469 high-strength aluminium-lithium alloy*
Published in Welding International, 2018
V. I. Lukin, S. Ya. Betsofen, M. D. Panteleev, M. I. Dolgova
The aluminium–lithium alloys have the highest mechanical, operational and corrosion characteristics so that they can compete with the conventional aluminium alloys and polymer composite materials. In addition to the considerable reduction of weight, these alloys are also characterized by higher strength, rigidity and specific and operational characteristics. However, they have a higher susceptibility to the formation of hot cracks, porosity and considerable softening under the effect of the thermal cycle of pressure welding, and this limits their application in welded structures. To ensure the competitiveness of the Russian components, it is necessary to use new methods of joining them [2–7].
Investigation of the weldability of an aluminium–lithium alloy
Published in Welding International, 2018
V. I. Lukin, A. A. Skupov, E. N. Ioda
The successful application of 1420 alloy was used as an impetus for the rapid development of aluminium–lithium alloys, including continuation of studies to develop alloys based on the Al–Li–Mg system, additionally alloyed with scandium, grades 1421 and 1424.