A case study for the selection of aluminum material suitable for critical parts used in the field of aviation

Aluminum parts are widely used in aviation because of the need for lightness. However, in addition to lightness, it is also developed in critically important parts that must have high strength properties. In this case, corrosion resistance, resistance to high temperatures, and workability has been investigated. When added in the features, it becomes difficult to choose among many aluminum materials that can be alternatives to each other. In order to overcome this difficulty, the developed model that takes into account many of the features listed above and ultimately recommends to the user the most suitable aluminum material for the relevant critical part will be a useful tool in overcoming the difficulties in this process. A material selection model will be proposed in this thesis for this purpose, and the decision-making model is demonstrated with examples in the field of aviation. The aviation industry is developing rapidly in terms of both commercial aircraft production and military aircraft/helicopter production. This development necessitates the production of these vehicles with better quality and suitable materials, and the effect of competition brings with it the necessity of realizing this situation at the lowest possible cost. Therefore, the development of models that will enable the selection of the most suitable materials among alternative materials, especially in the production of critical parts in the field of aviation, will be a guide for professionals working in this field. For this purpose, the fuzzy TOPSIS method is applied in the thesis, and suitable alternatives are determined as a result of ranking the alternative alloys.