Phase-field modelling of rapid solidification of alloys

合金快速凝固的相场建模

• 批准号: 2199350
• 金额: --
• 依托单位: University of Birmingham
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2199350
• 关键词: Phase; field; modelling; rapid; solidification

The project aims at developing a phase-field model for simulating solidification of Ni-based alloys during rapid solidification, as encountered during additive manufacturing. Current phase-field models for solidification are based on the local equilibrium assumption to be valid at the moving interface. This approximation is working well for common solidification methods such as Bridgman processing and shape casting. During additive manufacturing however much higher cooling rates are observed, resulting in deviation from local equilibrium. This is commonly referred to as rapid solidification. In order to simulate microstructure formation during additive manufacturing, current phase-field models need to be extended accordingly.

该项目旨在开发一种相场模型，用于模拟快速凝固过程中镍基合金的凝固，如增材制造过程中遇到的。目前的凝固相场模型是基于局部平衡假设是有效的移动界面。这种近似对于普通的凝固方法如Bridgman工艺和成形铸造是有效的。然而，在增材制造期间，观察到更高的冷却速率，导致偏离局部平衡。这通常被称为快速凝固。为了模拟增材制造过程中的微结构形成，需要相应地扩展当前的相场模型。