Building Engineering capability in Titanium Alloys (BETA)

为了为未来的民用大型和商务航空燃气涡轮发动机提供有竞争力的产品，劳斯莱斯已经通过逐步改变旋转压缩机部件的材料，主要是圆盘和线性摩擦焊接（LFW）圆盘，找到了机会。钛合金技术的进步使市场上的材料强度更高，这将使设计更小、重量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和零碳排放推进发动机中整合变速箱或嵌入发电机所需的必要发动机架构。该项目旨在将高强度钛（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：*用于关键圆盘部件和压缩机机翼的新型高强度钛合金的鉴定*了解操作边界的完整寿命相关性，*开发用于不同合金连接和大型关键旋转部件（如风扇盘）制造的连接工艺，*扩展有关冷停留疲劳复杂现象的知识及其最新适用性钛合金。该计划将为开发最新的钛合金提供坚实的基础，这将带来性能的阶梯式变化。预计它将对未来发动机的性能提高和重量减轻做出重大贡献。HSTi对当前修复技术的影响将作为验证程序的一部分进行评估。今后的修理技术方案将考虑更先进的修理技术。潜在的合作伙伴是大学和研究中心，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咨询服务（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)).