Revealing flow patterns in fusion welding with stereo X-ray imaging.

通过立体 X 射线成像揭示熔焊中的流动模式。

• 批准号: EP/P02680X/1
• 负责人: Wajira Mirihanage
• 金额: $ 12.81万
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FP02680X%2F1
• 关键词: Revealing; flow; patterns; fusion; welding

Fusion welding is one of the most widely used and prominent joining methods for metallic alloys. It is well accepted that flow within the weld pool significantly influences weld region shape, microstructure, defect and resulting residual stress formation during solidification. However, there are no reliable experimental data on flow within metallic alloy weld pools and scientific understanding is reliant on simplified models and simulations that lack proper validation. Hence, the objective of this proposal is to acquire 3D visualisation in real time (i.e. 4D) quantification of the liquid metal flow to analyse evolving flow in weld pools. The results will guide, validate and qualify weld pool modelling and the scientific understanding will enable improvements in the weld processes. A unique and novel experimental configuration is proposed to realise time-resolved stereo X-ray imaging for in situ weld simulation experiments at the Diamond Light Source, UK. An experimental configuration, with two mutually inclined X-ray beams, which are obtained through splitting the regular synchrotron beam using X-ray optics, will be instrumental in realising the stereo imaging capability. Small, high X-ray attenuating particles embedded in the weld materials (in weld pool) will serve as markers to track the evolving fluid flow patterns. Combining the two sets of time-resolved images recorded in this stereo configuration, via bespoke image processing and analysing procedures will render 4D visualisation and spatio-temporal quantification of flow, enabling analysis of flow in evolving weld pools.

熔焊是金属合金最广泛使用和最突出的连接方法之一。焊接熔池内的流动对焊接区域的形状、组织、缺陷以及凝固过程中残余应力的形成有重要影响。然而，没有关于金属合金焊池内流动的可靠实验数据，并且科学理解依赖于缺乏适当验证的简化模型和模拟。因此，该提议的目的是获得液态金属流的真实的量化的3D可视化（即，4D），以分析焊池中的演变流动。研究结果将指导、验证和限定焊接熔池建模，科学的理解将有助于焊接工艺的改进。提出了一种独特的和新颖的实验配置，以实现时间分辨立体X射线成像的原位焊接模拟实验在钻石光源，英国。一个实验配置，两个相互倾斜的X射线束，这是通过分裂的定期同步加速器光束使用X射线光学获得的，将有助于实现立体成像能力。嵌入在焊接材料中（在焊接池中）的小的、高X射线衰减的颗粒将用作标记物以跟踪演变的流体流动模式。通过定制的图像处理和分析程序，结合在这种立体配置中记录的两组时间分辨图像，将呈现4D可视化和流动的时空量化，从而能够分析不断变化的焊池中的流动。

项目成果

X-Ray Imaging of Complex Flow Patterns during Tungsten Inert Gas Welding

• DOI: 10.1007/s11665-022-07042-6
• 发表时间: 2022-06
• 期刊: Journal of Materials Engineering and Performance
• 影响因子: 2.3
• 作者: F. Wu;K. Falch;S. Ramachandran;M. Drakopoulos;W. Mirihanage

Highly Stable Graphene Inks Based on Organic Binary Solvents

基于有机二元溶剂的高度稳定的石墨烯墨水

• DOI: 10.1002/ppsc.202200153
• 发表时间: 2023
• 期刊: Particle & Particle Systems Characterization
• 影响因子: 2.7
• 作者: Ahmed M

Non-steady 3D dendrite tip growth under diffusive and weakly convective conditions

扩散和弱对流条件下的非稳态 3D 枝晶尖端生长

• DOI: 10.1016/j.mtla.2019.100215
• 发表时间: 2019
• 期刊: Materialia
• 影响因子: 3.4
• 作者: Mirihanage W

Effects of melt pool flow on porosity levels in arc welding

熔池流动对电弧焊气孔率的影响

• DOI: 10.1088/1757-899x/1274/1/012011
• 发表时间: 2023
• 期刊: Materials Science and Engineering
• 作者: Wu F

Direct observation of the dynamic evolution of precipitates in aluminium alloy 7021 at high strain rates via high energy synchrotron X-rays

高能同步加速器X射线直接观察7021铝合金高应变率下析出相的动态演化

• DOI: 10.1016/j.actamat.2020.116532
• 发表时间: 2021
• 期刊: Acta Materialia
• 影响因子: 9.4
• 作者: Mirihanage W