Influence of Immediate Deformation and Natural Ageing on Al 6XXX Series Alloy Nanostructural Evolution

立即变形和自然时效对Al 6XXX系合金纳米结构演化的影响

• 批准号: 2594409
• 金额: --
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2594409
• 关键词: Influence; Immediate; Deformation; Natural; Ageing

Constellium extrusion are leading the way for automotive light-weighting by the development of high strength 6XXX series aluminium alloys. Alloys with yield stresses up to 400MPa are currently obtainable, but in order to further reduce the weight of the crash management system, these materials need improved levels of energy absorption on impact.A novel fabrication route is under development to produce alloys with enhanced crushability, however, there is a lack of fundamental understanding of how the desired microstructure develops. There are a number of open questions surrounding the initial clustering mechanisms. The unique capability of the microscopy technique, atom probe tomography, with its ability to visualize and quantify the size and chemistry at the initial stages of clustering at the atomic scale, is essential to understanding the impact of each processing stage on the final microstructure, and Oxford University is the only facility in the UK with expertise in this area.The aims of this project are to identify the effects of trace alloy additions on the cluster formation, and explore the impact of various processing parameters (time temperature, deformation) on the clustering kinetics. By working in close collaboration with Innoval Technology (Banbury ,UK), Constellium and the rapid prototyping centre at Brunel University, the subsequent impact on mechanical properties can be assessed, and a carefully controlled microstructure will then be engineered with improved crush properties. The project will develop atom probe tomography techniques to make direct atomic-scale microstructural comparisons across a range of processing treatment and alloy compositions. It will also incorporate site-specific Plasma Focused Ion Beam specimen preparation techniques and complementary microscopy, such as TEM, for a holistic characterisation of the effectiveness of the processed alloys. Ultimately the goal is to correlate this unique 3D nanoscale information to optimising the mechanical properties/performance for applications of these Al alloys in the automotive sector.The project directly addresses the EPSRC theme, Manufacturing the Future. It also directly contributes to EPSRC priority areas such as: Lightweight Systems, Materials Characterisation and Structural Integrity and Materials Behaviour. It also has the potential to develop greater collaborative links in this area with other UK academic and industrial partners.Themes: Engineering; Manufacturing the future; Physical sciences

高强度6xxx系列铝合金的发展，星座挤出正在引导汽车轻巧。目前可以获得屈服应力高达400MPA的合金，但是为了进一步减少碰撞管理系统的重量，这些材料需要提高影响对影响的能量吸收水平。开发了一种新型的制造途径，以产生具有增强可损坏的合金，但是，缺乏对所需微型结构如何发展的基本了解。围绕初始聚类机制有许多空旷的问题。显微镜技术，原子探针层析成像的独特能力，其能力在原子量表下的初始阶段可视化和量化大小和化学的能力，对于理解每个处理阶段对最终微观结构的影响至关重要，牛津大学是在此领域中唯一的专业知识。聚类动力学上的处理参数（时间温度，变形）。通过与Innoval Technology（英国Banbury），Brunel University的快速原型化中心密切合作，可以评估随后对机械性能的影响，然后通过改进的粉碎特性进行精心控制的微观结构。该项目将开发原子探针断层扫描技术，以对一系列加工处理和合金组成进行直接的原子级微结构比较。它还将结合特定于位点的等离子体浓缩离子束样品制备技术和互补显微镜，例如TEM，以对加工合金的有效性进行整体表征。最终，目标是将此独特的3D纳米级信息相关联，以优化汽车领域这些AL合金应用的机械性能/性能。该项目直接解决EPSRC主题，从而制造未来。它还直接有助于EPSRC的优先领域，例如：轻巧的系统，材料表征以及结构完整性和材料行为。它还有潜力与英国其他学术和工业伙伴建立更大的协作联系。主题：工程；制造未来；物理科学