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

发动机的重新设计已经降低了涡轮叶片根部的温度，在这个温度范围内，材料的性能还没有得到很好的探索。本博士研究单晶材料在广泛温度范围内的屈服和流动的基本机制。重点将放在成分、温度和取向对产率机制的影响上，主要使用先进的透射电镜技术进行研究。特别是，将研究Kear-Wilsdorf锁定对流动强度的影响程度，并开发算法将其纳入屈服模型。

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.