Development of a Powder Based Manufacturing Route for Affordable Titanium Aluminide Sheet for Nacelle Engine Applications

开发用于短舱发动机应用的经济实惠的铝化钛板的粉末制造路线

• 批准号: 2879735
• 金额: --
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2879735
• 关键词: Development; Powder; Based; Manufacturing; Route

Intermetallic titanium aluminides (TiAl) based alloys provide a good combination of low density, high strength at elevated temperatures, good oxidation and hot gas corrosion resistance, providing excellent engineering properties for structural aerospace applications and automotive turbocharger applications. They have been proven in recent applications, such as the low-pressure turbine (LPT) blades in the GEnx commercial aircraft engine (Boeing 787). TiAl based alloys provide unique properties for aerostructural high temperature applications and can replace heavier nickel-based superalloys. Many potential future applications will require TiAl based alloys in sheet form which requires homogeneous ingot feedstock, extrusion/forging and controlled hot and cold rolling schedules. Multi-pass schedules for TiAl based alloys from ingot is challenging, as process windows are very narrow due to micro-segregation during the casting process. And therefore, further research is needed to increase the use of TiAl based alloys from powder metallurgy routes in wider structural aerospace applications, such as engine nacelle parts, which are reaching their operating limits. Outputs generated from this EngD/PHD will provide further confidence in the processing of such alloys with aspirations of a lower cost processing route for such sheet product from powder. This will ultimately contribute to reduced fuel consumption and make air and space transport greener. In this exciting EngD/PHD project, solid state powder routes, such as hot isostatic pressing and field-assisted sintering, will be used in conjunction with controlled hot and cold rolling to determine the effects of powder characteristics and alloy composition on the (1) hot rolling and thermomechanical processing characteristics and (2) microstructure and property development. In the first instance pack rolling in stainless steel packages and using heated rolls will be applied - to enhance the ductility, reduce oxidation and reduce cracking susceptibility. FE modelling software will be used to correlate thermomechanical processing, plane strain rolling parameters with microstructural evolution. Post hot rolling processing, such as cold rolling and superplastic forming will be related to the upstream powder-based, hot rolling route.

基于金属钛合金（TIAL）的合金提供了低密度，高温下高强度，良好的氧化和热气体耐耐药性的良好组合，为结构航空航天应用和汽车涡轮增压器应用提供了出色的工程特性。它们在最近的应用中已被证明，例如Genx商用飞机发动机（波音787）中的低压涡轮机（LPT）叶片。基于TIAL的合金为航空结构高温应用提供了独特的特性，并可以替代较重的基于镍的超合金。许多潜在的未来应用将需要基于Tial的合金形式，需要均质的铸锭原料，挤出/锻造和受控的热滚动计划。来自Ingot的基于TIAL的合金的多通式时间表很具有挑战性，因为由于铸造过程中的微分离，过程窗口非常狭窄。因此，需要进一步的研究来增加在更广泛的结构航空航天应用中（例如发动机Nacelle零件）中粉状冶金路线的基于TIAL的合金的使用，这些零件已达到其操作限制。该ENGD/PHD产生的输出将对此类合金的加工产生进一步的信心，该合金具有较低的成本处理途径的质量，用于从粉末开始使用此类床单。这最终将有助于减少燃油消耗，并使空气和太空运输更绿。在这个令人兴奋的Engd/PhD项目中，固态粉末路线（例如热等速度压迫和现场辅助烧结）将与受控的热和冷滚动结合使用，以确定粉末特性和合金组成对（1）热滚动和热力学处理特性以及（2）微型结构和物业开发的影响。首先，将使用不锈钢包装滚动和使用加热的卷卷，以增强延展性，减少氧化并降低开裂易感性。 FE建模软件将用于将热机械处理，平面应变参数与微结构演化相关联。后热滚动处理（例如冷滚动和超代型形成）将与上游粉末的热滚路有关。