Effect of low temperature on the yield behaviour of single crystal nickel-based superalloys

低温对单晶镍基高温合金屈服行为的影响

• 批准号: 2277932
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2277932
• 关键词: Effect; low; temperature; yield; behaviour

Engine redesign has lowered the temperatures in the roots of turbine blades to a temperature range in which the properties of the material are not well explored. This PhD addresses the basic mechanisms of yield and flow in single crystal materials across a wide range of temperatures. The focus will be on the effects of composition, temperature and orientation on the mechanism of yield, investigated principally using advanced TEM techniques. In particular, the extent to which Kear-Wilsdorf locking contributes to flow strength will be investigated, and algorithms developed to incorporate this into models of yield.

发动机的重新设计已经将涡轮机叶片根部的温度降低到一个温度范围，在该温度范围内，材料的性能没有得到很好的研究。这个博士学位解决了在很宽的温度范围内单晶材料的产量和流动的基本机制。重点将放在成分，温度和取向对产量机制的影响上，主要使用先进的TEM技术进行研究。特别是，Kear-Wilsdorf锁定有助于流动强度的程度将被调查，并开发算法将其纳入模型的产量。