Micromechanical analysis of dislocation networks at dynamic ɣ/ɣ’ interfaces (C08#)

动态 É£/É£â 界面位错网络的微机械分析 (C08

• 批准号: 459867372
• 金额: --
• 依托单位: Interdisciplinary Centre for Advanced Materials Simulations
• 依托单位国家: 德国
• 项目类别: CRC/Transregios
• 财政年份: 2021
• 资助国家: 德国
• 起止时间: 2020-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/459867372?language=en
• 关键词: Micromechanical; analysis; dislocation; networks; dynamic

Project C8 aims at answering the questions if experimentally observed grooves and ledges around ɣ’ particles is an effect mainly driven by cooling or if it is a dynamic effect during deformation as well as the effect of the misfit dislocation network on rafting of ɣ’ particles. This is achieved through a simplified model for dislocation climb and dynamic coupling of discrete dislocation dynamics with the phase field method. Parametrization and calibration is achieved using previous works as well as a direct comparison to shear creep experiments from other projects of SFB/TR 103. The work of project C8 will answer long standing experimental observations and extends the current understanding of the evolution of the microstructures in superalloys.

C8项目旨在回答以下问题：实验观察到的围绕“π”颗粒的凹槽和凸台是否主要由冷却驱动，或者是否是变形过程中的动力学效应，以及失配位错网络对“π”颗粒漂流的影响。这是通过一个简化的位错攀移模型和动态耦合的离散位错动力学相场方法。参数化和校准是实现使用以前的作品，以及直接比较剪切蠕变实验从其他项目的SFB/TR 103。C8项目的工作将回答长期存在的实验观察，并扩展目前对高温合金微观结构演变的理解。