短裂纹尖端位错微结构相互作用的PhD建模

拉夫堡大学在研究强度（REF2014）方面是英格兰排名前十的大学，并且有资格提交给REF的拉夫堡学术人员中有66％的杰出工作被评为“世界领先”。或“国际一流”，而全国平均水平为43％。<br>在选择拉夫堡进行研究时，您将与该领域的领导者一起工作。您将受益于我们的全面支持和指导，包括量身定制的职业建议，以帮助您在研究和未来职业中取得成功。<br>项目详细信息：镍基高温合金尤其适用于涉及高温和高应力的应用，例如航空航天和发电行业中的关键燃气轮机叶片和圆盘。镍超级合金中的短裂纹行为对于部件设计和寿命预测特别重要
Nickel-based superalloys are particularly used in applications involving high temperatures and stresses, such as the critical gas-turbine blades and discs in aerospace and power-generation industries. The behaviour of short cracks in nickel superalloys is of particular importance for component design and life prediction, as a large proportion of service life is spent in the growth of small cracks before final failure. This project aims to investigate the fundamental deformation mechanism at the tip of a short crack for nickel-based superalloys under fatigue at a range of temperatures. The research will focus on the influence of evolving local plasticity, induced by dislocation dynamics at the crack tip, on short crack growth. A multi-scale finite element (FE) method will be established for the crack-tip deformation analyses, which aims to identify a micromechanics-based driving force for short crack growth. The ultimate goal is to deliver an efficient finite element procedure to predict short crack growth. The candidate will join the vibrant Mechanics of Advanced Materials research group at Loughborough University. Low cycle fatigue deformation and in-situ crack growth will be tested at both room and high temperatures, complemented by SEM/TEM characterisation. The results will be used to validate the multiscale models developed in this project. The research outcome will have significance in ensuring structural integrity of gas turbine systems.