Building Engineering capability in Titanium Alloys (BETA)

对于未来民用大型和商用航空燃气轮机发动机的竞争产品，罗尔罗伊斯通过逐步改变旋转压缩机部件(主要是圆盘和线性摩擦焊接(LFW)叶盘)所使用的材料，发现了机会。钛合金技术的进步导致市场上出现了强度更高的材料，这将使设计出更小、更轻的部件成为可能。通过扩展设计空间，新的组件设计体系结构将成为可能。这将支持在未来的超高效零碳排放推进发动机中安装变速箱或嵌入发电机所需的必要发动机架构。该计划旨在使高强度钛(HSTi)合金成熟到TRL6，并发展英国在HSTi中设计和制造先进部件的能力。该计划的一些关键成果如下：*用于关键阀盘部件和压缩机翼型的新型高强度钛合金的资格鉴定*用于了解操作边界的全寿命相关性，*为不同合金的连接和大型关键旋转部件(如风扇盘)的制造开发连接工艺，*扩展关于冷压疲劳的复杂现象及其对最新钛合金的适用性的知识。该计划将为开发最新的钛合金提供坚实的基础，这将带来能力上的阶段性变化。预计它将为未来发动机的性能提升和重量减轻做出重大贡献。HSTI对当前维修技术的影响将作为验证方案的一部分进行评估。未来的维修技术计划将考虑更先进的维修技术。潜在的合作者是大学和研究中心，如伯明翰大学(UOB)、先进锻造研究中心(AFRC)、伦敦帝国理工学院(ICL)、斯旺西大学(SU)，以及选定的专业工程资源(O‘Donnell Consulting Services(ODCS))。

For competitive product offerings for future civil large and business aviation gas turbine engines, Roll-Royce has identified opportunities through a step change in the materials utilised in rotating compressor components, primarily in discs and Linear Friction Welded (LFW) blisks. Advancements in titanium alloy technologies have resulted in higher strength materials being available in the market that will enable the design of smaller and lighter weight components. By expanding the design space, new component design architectures would be possible. This would support the necessary engine architectures required for incorporating gearboxes or embedding electrical generators in future Ultra-efficient and Zero-carbon emission propulsion engines.This programme aims to mature a High Strength Titanium (HSTi) alloy to TRL6 and develop UK capabilities to design & manufacture advanced components in HSTi. Some of the key deliverables from this programme are listed below:* Qualification of a new high strength titanium alloy for use in both critical disc components and compressor aerofoils* Full lifing correlations for understanding of operational boundaries,* Development of joining processes for dissimilar alloy joining and fabrication of large critical rotating components such as fan discs,* Extend knowledge on the complex phenomenon of cold dwell fatigue and its applicability to the latest titanium alloys.This programme will provide a solid foundation to exploit the latest titanium alloys, which will offer a step change in capability. It is anticipated to make a significant contribution to performance increases and weight reduction on future engines. The impact of HSTi on current repair techniques will be assessed as part of the validation programme. More advanced repair techniques will be considered in future repair technology programmes.Potential collaborators are universities and research centres such as University of Birmingham (UoB), Advanced Forging Research Centre (AFRC), and Imperial College London (ICL), Swansea University (SU), as well as selected specialist engineering resources (O'Donnell Consultancy Services (ODCS)).