Assessment of new fatigue capable titanium alloys for aerospace applications

评估用于航空航天应用的新型抗疲劳钛合金

• 批准号: 2879438
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2027
• 资助国家: 英国
• 起止时间: 2027 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2879438
• 关键词: Assessment; new; fatigue; capable; titanium

Titanium alloys are used in high performance rotating components for both large and small/medium civil gas turbines. For applications such as fan blades and fan discs, titanium alloys with enhanced strength and fatigue performance are required. Rolls-Royce currently utilises mainly Ti-6Al-4V for applications under 350C with new titanium alloys currently under development. As part of the ATI funded BETA program a number of commercially developed and R-R IP alloys are being considered. These alloys are RR11, S23, Ti542, Ti407, Ti412 and Titan 27.Latest developments on jet engines have raised the need for an alternative to Ti-6Al-4V with improved Range-mean fatigue performance, damage tolerance and cold dwell fatigue insensitivity while having good weldability to other titanium alloys and whose properties must be maintained after post welding heat treatment.Ti407 and Ti412 are known as lean aluminium alloys as they have much lower aluminium contents than common titanium alloys such as Ti-6Al-4V. They have been developed to enhance ductility at failure and hence energy absorption capability. Ti542 has been developed by Timet to be an alternative to Ti64 that is less sensitive to cold dwell. S23 has been developed via powder metallurgy route as a high strength titanium alloy may show enhanced fatigue performance. Finally, Titan27 has been developed as an improved Ti64 with excellent cold and hot workability.The primary purpose of this investigation is to develop fundamental understanding of how the down selected alloys respond to mechanical loading.It is envisaged that work would be carried out on the processing and optimization on the down selected materials to investigate the effect of chemistry variation using small scale melts and processing routes on the mechanical properties and its scalability to production size components.During the programme, the student will develop core skills in advanced microscopy, such as microstructural and texture characterisation, fundamental titanium metallurgy and thermomechanical processing. The student will develop an insight into the development path of alloys for usage in the aerospace sector and work closely with engineers at Rolls-Royce.

钛合金用于大/中小型燃气轮机的高性能旋转组件。对于诸如风扇叶片和风盘盘等应用，需要具有增强强度和疲劳性能的钛合金。 Rolls-Royce目前主要利用TI-6AL-4V用于350C以下的应用，目前正在开发新的钛合金。作为ATI资助的Beta计划的一部分，正在考虑许多商业开发和R-R IP合金。这些合金是RR11，S23，TI542，TI407，TI412和TITAN 27.喷气发动机上的最新开发结果增加了需要替代TI-6AL-4V的替代方案，并且范围范围疲劳的性能得到了改善，具有改善的范围疲劳性能，损害耐受性和寒冷的疲劳，同时具有良好的效果，并具有良好的效果，并且在其他型号的范围内保持着构成的效果，并且在其他型号的范围内保持了构成，并构成了其他型号的效果。处理。TI407和TI412被称为瘦铝合金，因为它们的铝含量比常见的钛合金（例如TI-6AL-4V）低得多。它们已被开发以增强失败时的延展性，从而增强能量能力。 TI542是由Timet开发的，它是Ti64的替代品，对冷居较少敏感。 S23是通过粉末冶金途径开发的，因为高强度钛合金可能显示出疲劳性能增强。最后，Titan27已被开发为一种改进的Ti64，具有出色的寒冷和热的可加工性。这项研究的主要目的是对下降所选合金如何响应机械负载的基本了解。它将设想在处理和优化的处理上，以对下降的材料进行处理，以调查小规模级别和加工型的尺寸，以进行量身定制的构图，并将其缩小缩放。计划，学生将开发高级显微镜的核心技能，例如微观结构和纹理表征，基本钛冶金和热力学处理。该学生将对航空航天领域的使用合金的开发路径有所了解，并与劳斯莱斯（Rolls-Royce）的工程师紧密合作。