A preliminary study of the modelling and microstructural requirements for brittle fracture of martensitic materials

这项建议的主要目的是在特定领域进行前期工作，以便启动两项研究建议，这些建议将重新提交给EPSRC。通过对现有试验方法的回顾，将提供最合适的技术(S)来确定：(A)马氏体/贝氏体界面上的扩展阻力；(B)混合晶粒度显微组织中的晶界(特别是在纳米尺度上)。同样，扩展三维几何模型以适应马氏体相变产物，以及开发具体的实验技术来表征微结构并询问这些微结构中脆性裂纹的萌生，将有助于启动拟议的工作方案。这一办法的一个关键因素是，它将保留两位PDRA，即Gillian Smith和Gareth Hughes博士发展起来的专门知识。

The main aim of the proposal is to undertake preliminary work in specific areas, to facilitate the start of two research proposals which are to be resubmitted to EPSRC. A review of the experimental methods available to measure crack resistance will provide the most appropriate technique(s) to determine the propagation resistance of: (a) martensitic/bainitic interfaces; and (b) grain boundaries in mixed grain size microstructures (particularly at the nano-scale). Similarly, the extension of the 3-D geometric models to accommodate a martensitic transformation product and the development of specific experimental techniques to characterise the microstructures and interrogate the initiation of brittle cracks in these microstructures will facilitate the start of the proposed work programmes. A key element of this approach is that it will retain the developed expertise of the two PDRAs, namely Drs Gillian Smith and Gareth Hughes.