Simulating the scatter of a polycrystalline in synchrotron diffraction using crystal plasticity simulation

使用晶体塑性模拟来模拟同步加速器衍射中多晶的散射

• 批准号: 2621778
• 金额: --
• 依托单位: University of Bristol
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2621778
• 关键词: Simulating; scatter; polycrystalline; synchrotron; diffraction

Application of high energy synchrotron diffraction to characterise the behaviour of industrial polycrystalline metallic materials has gained significant attention in the past decade. Critically, the in-situ experiments simulating the demanding environments under which the materials in safety critical industries such as nuclear work, have been instrumental in underpinning their constitutive laws. However, such experiments often examine only a small volume of materials due to the restrictions associated with X-ray depth penetration.In this project a true representative of polycrystalline material will be developed using a microstructurally informed crystal plasticity model. The model will be calibrated using previous and future experiments. The crystal plasticity model traditionally used within a finite element framework are slow to run. This project will take advantage of spectral method instead to perform numerical calculations required which will be orders of magnitude faster than the traditional methods. This advantage of spectral methods will be exploited to carry out statistical analysis on the effects of microstructure variability on the bounds of large-scale material response.While the main objective of the work is to quantify the material behaviour variability at balk, the response of single grains as a function of their environment will be also investigated. We will take advantage of Machine Learning applied on the results of the simulating to build surrogate models of the crystal plasticity to accelerate the analysis process.

在过去的十年里，高能同步辐射衍射在工业多晶金属材料性能研究中的应用得到了极大的关注。重要的是，模拟苛刻环境的现场实验，在这种环境下，安全关键行业（如核工作）的材料在支撑其本构律方面发挥了重要作用。然而，这样的实验往往只检查一小部分材料，由于与X射线深度penetration.In该项目的限制，真正的多晶材料的代表将开发使用微观结构的晶体塑性模型。该模型将使用以前和将来的实验进行校准。传统的晶体塑性模型在有限元框架内运行速度慢。该项目将利用谱方法来执行所需的数值计算，这将比传统方法快几个数量级。谱方法的这一优势将被利用来进行统计分析的微观结构的变化对大规模的材料responses.While工作的主要目标是量化的材料行为的变异性在balk的影响，响应作为其环境的函数的单个颗粒也将被调查。我们将利用机器学习的模拟结果，建立晶体塑性的代理模型，以加快分析过程。