'Modelling and simulation of microstructure and defect evolution in Additive Manufacturing

增材制造中微观结构和缺陷演变的建模和模拟

• 批准号: 2879601
• 金额: --
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2879601
• 关键词: Modelling; simulation; microstructure; defect; evolution

Additive manufacture has the potential of fabricating of parts with novel designs not possible with traditional manufacturing routes, as well as, enabling location specific tailoring of properties for functional optimisation of the part. However, process-induced microstructure and defect variations and associated scatter in mechanical properties make certification of AM parts challenging. This project will focus on the development of a physics-based modelling capability for predicting the non-equilibrium microstructures during additive manufacture of titanium alloys. A multiscale materials modelling approach will be adopted that enables simulation of the solidification structures such dendrites, solid-state phase transitions and voids. A representative volume element of the AM part will provide a link between the process-induced microstructures and process parameters.

增材制造具有制造具有新颖设计的零件的潜力，这是传统制造路线无法实现的，并且可以实现特定位置的特性定制，以实现零件的功能优化。然而，工艺引起的微观结构和缺陷变化以及相关的机械性能分散使得增材制造零件的认证具有挑战性。该项目将重点发展基于物理的建模能力，用于预测钛合金增材制造过程中的非平衡微观结构。将采用多尺度材料建模方法来模拟诸如枝晶、固态相变和空洞等凝固结构。增材制造零件的代表性体积单元将在工艺诱发的微观结构和工艺参数之间提供联系。