The Physics and Mechanics of Creep Cavity Nucleation and Sintering in Energy Materials

该研究项目将研究蠕变空穴成核的物理学和力学，以及使用建模和实验方法在多晶材料中烧结愈合的反向过程。实验工作将集中在模型单相材料（商业纯镍），一个简单的颗粒强化材料（镍添加碳），商业奥氏体不锈钢（316 H型），高温合金（IN 718）和马氏体钢P91/92。一系列最先进的实验技术将被应用于通知新的基于物理的沉淀硬化材料的空腔成核和烧结模型的发展。一旦在机械分析中实施并得到验证，这些模型将成为开发高热效率发电厂部件的改进寿命估算程序的基础。

The research project will study the physics and mechanics of creep cavity nucleation and the reverse process of healing by sintering in polycrystalline materials for energy applications using both modelling and experimental approaches. The experimental work will focus on a model single phase material (commercially pure Nickel), a simple particle strengthened material (Nickel with addition of Carbon), a commercial austenitic stainless steel (Type 316H), a superalloy (IN718) and a martensitic steel P91/92. An array of state-of-the-art experimental techniques will be applied to inform the development of new physics-based cavity nucleation and sintering models for precipitation hardening materials. Once implemented in mechanical analyses, and validated, such models will form the basis for development of improved life estimation procedures for high thermal efficiency power plant components.