Quantifying variability in the mechanical response of CrCrZr alloys using crystal plasticity modelling

该项目旨在评估金属接头的蠕变疲劳寿命，这些接头预计将用于原型聚变工厂。感兴趣的接头由自生CuCrZr焊缝组成。为了更好地预测其寿命，需要一种方法来准确地预测整个焊缝的应力分布。根据规定，使用该小组开发的晶体塑性建模框架将提供所需的应力场，因为它考虑了整个焊缝的微观结构变化。该项目的第一步是根据CuCrZr高温低循环试验校准模型。在项目后期，考虑到CuCrZr变形对热处理非常敏感，将使用晶体塑性框架通过基于微观结构的敏感性分析来估计机械性能的变化。

This project aims to evaluate the creep-fatigue life of metal joints that are expected to feature in prototype fusion plants. The joints of interest are made up of autogenous CuCrZr welds. A method to accurately predict the stress distribution across the weld is needed for better prediction of its life. It is stipulated that the use of a crystal plasticity modelling framework that has been developed in the group will provide the needed stress field as it accounts for the microstructure variability across the weld.The first step in the project is the calibration of the model to CuCrZr high-temperature, low-cyclic testing. Later during the project, considering CuCrZr deformation is very sensitive to heat-treatment, the variability in the mechanical performance will be estimated by a microstructure-based sensitivity analysis using the crystal plasticity framework.