الفهرس 
Chapter 1: Introduction, Literature Review and Aim of this WorkOnly 14 pages are availabe for public view
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Abstract
This study aims to contribute scientifically and significantly through improving the mechanical properties of Al-Li alloy to achieve high performance which is required by the aerospace applications. We utilized a viable method to enhance the physical properties and performance of Al-based alloys is by incorporation of reinforcement particles to the Al matrix. In this thesis, a series of Al-Li, Al-Li-Cu and Al-Li-Co alloys were manufactured and the mechanical behaviour and microstructure were investigated in detail. The produced alloys in the form ribbons were made using a melt-spun technology, which is a viable method to improve the microstructure, mechanical and thermal properties of Al-based alloys materials. In addition, the advanced processing routes a homogeneous distribution of reinforcement products is present. To investigate the preference of the Al alloys including mechanical and thermal properties and relate this to the microstructures, ribbons were investigated using techniques such as XRD, SEM and DSC, mechanical test machine and Vickers microhardness test. The collective results of this thesis demonstrate a detailed understand of the manufacture of Al-Li/Cu or Co alloys and the mechanism of microstructure formation. The results are significance scientifically, have industrial relevance, implications in controlling the microstructure, improving the performance and reliability of Al alloys.In this work, the alloys were divided into five groups as shown below: First group: binary alloys consisting of Al-xLi (where x = 1, 2, 3, 4, and 5 wt. %).Second group: ternary alloys consisting of Al-2Li-xCu (where x = 0.1, 0.3, 0.5, 0.7 and 1 wt. %).Third group: ternary alloys consisting of Al-4Li-xCu (where x = 0.1, 0.3, 0.5, 0.7, 1, and Al-5Li-1Cu wt. %)Fourth group: includes exposing the same previous series of alloys to thermal treatment at constant temperature (265oC) for different period (3 and 6 hours).Fifth group: ternary alloys consisting of Al-2Li-xCo (where x = 0.1, 0.3, 0.5, 0.7, and 1 wt. %).from the results, it can be said, that the rapid solidification and Al8.9Li1.1 IMC enhances the strength of Al-Li alloys.