'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.

添加剂的生产有可能通过传统的制造路线来制造具有新颖设计的零件，并且可以实现特定位置的特定特定性能，以优化零件的功能性优化。但是，过程引起的微结构和缺陷变化以及机械性能中的相关散射使AM零件的认证具有挑战性。该项目将着重于开发基于物理的建模能力，以预测钛合金添加性生产过程中的非平衡微观结构。将采用多尺度材料建模方法，以模拟固化结构，例如树突，固态相变和空隙。 AM部分的代表性体积元素将提供过程诱导的微结构与过程参数之间的联系。