CMMI-EPSRC: Quantitative Characterization of Mission Critical Microstructures of Engineering Metals with Diffusive Ultrasound

CMMI-EPSRC：利用扩散超声波对工程金属的关键微观结构进行定量表征

• 批准号: 2225215
• 负责人: Christopher Kube
• 金额: $ 59.22万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-08-01 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2225215&HistoricalAwards=false
• 关键词: CMMI; EPSRC; Quantitative; Characterization; Mission

This award is funded through the NSF Directorate for Engineering - UKRI Engineering and Physical Sciences Research Council Lead Agency (ENG-EPSRC) Opportunity, a collaborative solicitation between NSF and the Engineering and Physical Sciences Research Council (EPSRC) of United Kingdom Research and Innovation (UKRI). It will fund research that enables reliable assurance of safety-critical metal components, for example those used in the aerospace and nuclear power industries, thereby promoting the progress of science, and advancing the national prosperity and welfare. Thermomechanical processes that occur during manufacturing of metal parts result in grain microstructures that dictate strength, fatigue life, and creep and corrosion resistance. It is essential that these microstructures be carefully controlled during production and non-destructively characterized once a component is finished. Although ultrasound technology is the only practical means to access internal material properties, it has seen very limited industrial usage, as accurate interpretation of ultrasonic signals in terms of such microstructure remains an unsolved problem. Alternative techniques that rely on destructive testing of sacrificial samples after elaborate preparation are recognized as inadequate, as evidenced for example by failures of aircraft engines. This project will overcome these shortcomings by advancing a new method of interpreting ultrasonic wave scattering due to microstructural texture and inhomogeneities, potentially revolutionizing the use of non-destructive, contactless, ultrasonic characterization throughout production and in service, at elevated temperatures and on complex shapes. This capability will support the growth of new advanced manufacturing processes, whose vital need of quality control and assurance on complex geometries is currently only partially met. Collaboration with Dr. Bo Lan of Imperial College London will provide opportunities for international research exchange and training of postdoctoral scientists, as well as routes for industry outreach facilitated through the United Kingdom Research Centre in Nondestructive Evaluation.This research aims to make fundamental contributions to the development of an ultrasonic diffuse wave field method that enables volumetric characterization of mission critical microstructure of engineering metals. It will achieve this objective by designing and calibrating experimental transduction mechanisms and signal processing techniques for extracting the full Green’s tensor from the diffuse wave field on different sample geometries, and relating properties of diffusivity, attenuation, and scattering to microstructure-related properties. Further, a general multiple scattering theory will be derived in combination with radiative transfer theory, to account for the effects of texture and microstructures on coherent waves and to describe the incoherent wave diffusion. Computational models of such wave diffusion will be validated against experimental results and used to construct a knowledge database of quantitative linkages between the diffuse wave field and material microstructures. Finally, a robust inversion method will be developed for deducing critical microstructural properties from the diffuse wave field data.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该奖项由NSF工程局 - 乌克里工程和物理科学研究委员会首席机构（ENG -EPSRC）机会，这是英国联合王国研究与创新（UKRI）的NSF与工程和物理科学研究委员会（EPSRC）之间的合作邀请。它将资助可靠地保证安全关键金属组件的研究，例如在航空和核电行业中使用的组件，从而促进科学的进步，并促进国家繁荣和福利。在金属零件制造过程中发生的热机械过程会导致谷物微观结构决定强度，疲劳寿命以及蠕变和腐蚀性。必须在生产过程中仔细控制这些微观结构，并且一旦组件完成，就必须对这些微观结构进行无损的特征。尽管超声技术是访问内部材料属性的唯一实际手段，但它的工业用法非常有限，因为根据此类微观结构，对超声波信号的准确解释仍然是一个尚未解决的问题。依赖于精心制备后牺牲样品破坏性测试的替代技术被认为是不足的，例如，飞机发动机的故障证明了这一点。该项目将通过推进一种新的方法来克服这些缺陷，通过一种新的方法来解释由于微观结构纹理和不均匀性而引起的超声波散射，从而有可能彻底改变了在整个生产和服务中，在升高的温度和复杂形状上的非破坏性，无接触式，无接触式，超声表征。这种能力将支持新的先进制造过程的增长，其质量控制和对复杂几何形状的保证的至关重要的需求目前仅得到部分满足。与伦敦帝国帝国学院的Bo Lan博士合作将为国际研究交流和培训提供博士后科学家的培训，以及通过英国研究中心制备的行业宣传路线，该研究中的非损害性评估。该研究旨在为超声波弥漫性波的发展做出基本贡献，以实现大量传教士批判性显微构建Engemering Metering Metering Metering Meterering Meterering Meterering Meterering Meterering Meterering Meterering Meterering Meterering Meterering Meterering Meterering Meterering Meterering Meterering Meterering Meterering Meterering Meterering Meterering Meterering的大量表征。它将通过设计和校准实验翻译机制和信号处理技术来实现这一目标，以从不同样品几何形状上的弥漫性波场中提取全格林的张量，并将不同的性能，衰减和散射与微结构相关特性相关。此外，将与辐射转移理论结合得出一般的多重散射理论，以说明纹理和微观结构对相干波的影响并描述不相互的波浪差。这种波浪差异的计算模型将根据实验结果进行验证，并用于构建扩散波场和材料微观结构之间定量链接的知识数据库。最后，将开发出一种强大的反转方法，用于从弥漫性波场数据中推论关键的微观结构特性。该奖项反映了NSF的法定任务，并使用基金会的智力优点和更广泛的影响审查标准，认为通过评估被认为是珍贵的支持。