Materials Selection of Optimized Titanium Alloys for Aircraft Applications

The aim of the present work was to explore the correlation between the physical metallurgy of titanium alloys and its main attributes to select optimized materials for structural aircraft applications in the landing gear beam. The Ashby's method was employed as the materials selection strategy to consolidate and evaluate the data collected from the current literature in a comprehensive and consistent analysis. Landing gear beam materials are mainly β and near-β alloys. Considering the need for high specific strength and fatigue resistance, the best candidate among them was Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe alloy. Finally, a brief discussion of additional aspects related to alloy design, microstructural features and their influence on the mechanical properties is presented.本研究旨在探究钛合金物理冶金学与其核心性能之间的相关性，以遴选适用于飞机起落架梁结构应用的优化材料。本研究采用阿什比法（Ashby's method）作为材料遴选策略，对现有文献收录的数据开展全面且统一的整合分析。起落架梁所用材料以β型及近β型钛合金为主。考虑到对高比强度与抗疲劳性能的需求，该类合金中的最佳候选材料为Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe合金。最后，本文简要探讨了与合金设计、微观组织特征及其对力学性能的影响相关的其他方面。