Dislocation microstructure evolution: Enabling the analysis of experimentally measured structures within a discrete dislocation dynamics modelling framework

位错微结构演化：能够在离散位错动力学建模框架内分析实验测量的结构

• 批准号: 404796075
• 负责人: Dr. Daniel Weygand
• 金额: --
• 依托单位: Institut für Angewandte Materialien - Mikrostruktur-Modellierung und Simulation (IAM-MMS)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/404796075?language=en
• 关键词: Dislocation; microstructure; evolution; Enabling; analysis

The plastic properties of a material are determined by the behavior of dislocations. The project shall establish a link between experimentally observed dislocation structures and a stability analysis within a three-dimensional discrete dislocation dynamics simulation tool. During mechanical tests, dislocation networks are formed. These will be investigated experimentally at the University of Santa Barbara using a transmission scanning electron microscope (TSEM). The TSEM allows to analyze dislocations in relatively thick samples. The objective is twofold: (i) to better understand the nature of the observed structure thus improving the interpretation of the observations and (ii) to critically assess model assumptions and parameters within the dislocation dynamics framework.

材料的塑性是由位错的行为决定的。该项目应在实验观察到的位错结构和三维离散位错动力学模拟工具中的稳定性分析之间建立联系。在力学测试过程中，位错网络形成。这些将在圣巴巴拉大学使用透射扫描电子显微镜（TSEM）进行实验研究。TSEM允许分析相对厚的样品中的位错。目标有两个：（i）更好地理解观察到的结构的性质，从而改善对观察结果的解释;（ii）在位错动力学框架内严格评估模型假设和参数。