Multiscale and multimodal characterization of polycrystal plasticity in metallic materials

This proposal will develop, and make available to the user community, a new experimental and algorithmic framework to conduct simulation informed multi-modal in situ experiments on metallic materials. This will allow to study the mechanical behaviour of polycrystalline samples at the microstructural scale (deformation, fracture). The establishment of automated acquisition and data processing pipelines will allow for the first time to use the feedback from experimentally driven simulations of the material response to guide subsequent “zoom-in” observations in selected regions of interest. Achieving this ambitious goal requires (i) a new, fully integrated, in situ load stage compatible with both id11 end stations (ii) an efficient data processing pipeline for DCT, topotomography and scanning-3DXRD acquisitions (both interactive & automated) and (iii) experimentally driven mechanical simulation routines to add stress/strain fields to the reconstructed data.

本提案将开发一套全新的实验与算法框架，并向用户社区开放共享，用于开展面向金属材料、以模拟为指引的多模态原位（in situ）实验。该框架可支持在微观结构尺度下研究多晶试样的力学行为，涵盖变形与断裂过程。自动化采集与数据处理流程的搭建，将首次实现借助材料响应的实验驱动模拟所获反馈，来指导选定感兴趣区域内的后续"zoom-in"精细化观测。要达成这一宏伟目标，需满足三项核心条件：(i) 一套全新的全集成原位加载台（in situ load stage），需兼容两台id11终端站；(ii) 一套可适配DCT、拓扑层析成像（topotomography）以及扫描式3DXRD采集任务的高效数据处理流程，同时支持交互与自动化两种模式；(iii) 可向重建数据中添加应力/应变场的实验驱动型力学模拟例程。