Collaborative Research: Identifying Hydrogen-Density Based Laws for Plasticity in Polycrystalline Materials
合作研究:确定基于氢密度的多晶材料塑性定律
基本信息
- 批准号:2303108
- 负责人:
- 金额:$ 27.38万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2023
- 资助国家:美国
- 起止时间:2023-08-01 至 2026-07-31
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
Hydrogen-induced degradation of structural materials is responsible for unexpected component failures across the aerospace, marine, energy, and infrastructure sectors. Similarly, concerns over hydrogen-induced embrittlement are a primary factor hindering the broader adoption of a hydrogen-based fuel economy. Current efforts to prevent these failures are complicated by challenges with accurately predicting hydrogen-related damage and its dependence on hydrogen concentration. This study will use a combined experimental and modeling approach to address these questions, resulting in new fundamental understanding of how hydrogen affects material behavior. This research will also benefit the national welfare in clean energy efforts by enabling the prediction of hydrogen-induced damage under conditions where hydrogen-assisted fracture is of concern. Moreover, in addition to training multiple graduate students, this project will actively engage in educational outreach with middle and high school students through dedicated events, lectures, and laboratory demonstrations.The researched study will establish how hydrogen affects plastic damage accumulation and leverage developed insights to create a hydrogen-sensitive crystal plasticity framework. First, conventional (mechanical testing) and advanced (high-energy X-ray diffraction) techniques will be employed to elucidate the effect of hydrogen concentration on the deformation behavior of pure single crystal and polycrystal Ni under monotonic and cyclic loading conditions. Second, this dataset will be leveraged to derive consistent hydrogen-sensitive laws for crystallographic slip and hardening that incorporate hydrogen effects on backstress development and dynamic recovery, enabling use for a wide range of hydrogen concentrations and loading conditions. Third, these deformation laws will then be integrated into a crystal plasticity framework, which will undergo validation using both experimental mechanical testing data and spatial distributions of microstructure-scale elastic strains via electron backscatter diffraction techniques to demonstrate model efficacy. The researched study will have broad impact as the hydrogen-informed crystal plasticity framework will be critical to supporting a hydrogen-based fuel economy. Additionally, all experimental data from this effort will be made available to the research community. Middle and high school students will get exposure and insight into critical issues for hydrogen embrittlement based on interactive Virtual Labs, case studies, and hands-on laboratory investigations that illustrate hydrogen’s effect on deformation behavior and potential component failure.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.
氢气引起的结构材料降解是航空航天、海洋、能源和基础设施部门发生意外部件故障的原因。同样,对氢致脆化的担忧是阻碍更广泛采用氢基燃料经济性的主要因素。目前防止这些故障的努力因准确预测与氢有关的损害及其对氢浓度的依赖而变得复杂。这项研究将使用实验和建模相结合的方法来解决这些问题,从而对氢如何影响材料行为有新的基本理解。这项研究还将有利于清洁能源努力中的国家福利,因为它能够预测在氢辅助断裂令人担忧的条件下的氢致损害。此外,除了培养多名研究生外,该项目还将通过专门的活动、讲座和实验室演示,积极开展对初中生的教育宣传。这项研究将建立氢如何影响塑料损伤积累,并利用已开发的见解来创建对氢敏感的晶体塑性框架。首先,用常规的(力学测试)和先进的(高能X射线衍射)技术来阐明氢浓度对纯单晶和多晶Ni在单调和循环加载条件下变形行为的影响。其次,这个数据集将被用来推导一致的晶体滑移和硬化的氢敏感定律,其中包含了氢对背应力发展和动态恢复的影响,从而能够在广泛的氢浓度和加载条件下使用。第三,这些变形规律将被整合到晶体塑性框架中,该框架将通过实验力学测试数据和微观结构尺度弹性应变的空间分布通过电子背散射衍射技术进行验证,以验证模型的有效性。这项研究将产生广泛的影响,因为氢信息的晶体塑性框架将是支持氢基燃料经济性的关键。此外,这项工作的所有实验数据都将提供给研究界。初中生和高中生将通过互动的虚拟实验室、案例研究和亲身实践的实验室调查,了解氢脆的关键问题,这些调查说明了氢对变形行为和潜在部件失效的影响。该奖项反映了NSF的法定使命,并通过使用基金会的智力优势和更广泛的影响审查标准进行评估,被认为值得支持。
项目成果
期刊论文数量(0)
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Zachary Harris其他文献
A POMDP Framework for Coordinated Guidance of Autonomous UAVs for Multitarget Tracking
用于多目标跟踪的自主无人机协调制导的 POMDP 框架
- DOI:
- 发表时间:
2009 - 期刊:
- 影响因子:1.9
- 作者:
Scott A. Miller;Zachary Harris;E. Chong - 通讯作者:
E. Chong
On arithmetical structures on complete graphs
完全图上的算术结构
- DOI:
10.2140/involve.2020.13.345 - 发表时间:
2019 - 期刊:
- 影响因子:0
- 作者:
Zachary Harris;Joel Louwsma - 通讯作者:
Joel Louwsma
517: ANTRAL CONTENT ASSESSMENT TO DETERMINE NIL PER OS STATUS IN A FLIPPED CLASSROOM MODEL: INTRODUCING POINT OF CARE ULTRASOUND CURRICULUM IN A GASTROENTEROLOGY FELLOWSHIP PROGRAM
- DOI:
10.1016/s0016-5085(22)60289-0 - 发表时间:
2022-05-01 - 期刊:
- 影响因子:
- 作者:
Chaudry N. Majeed;Zachary Harris;Catherine Cheney;Jared Rejeski - 通讯作者:
Jared Rejeski
Higher-loop Euler-Heisenberg transseries structure
高环欧拉-海森堡跨级结构
- DOI:
- 发表时间:
2021 - 期刊:
- 影响因子:0
- 作者:
G. Dunne;Zachary Harris - 通讯作者:
Zachary Harris
WHAT IS UNEARTHED IN A GRAVEYARD?
- DOI:
10.1016/j.chest.2019.08.1635 - 发表时间:
2019-10-01 - 期刊:
- 影响因子:
- 作者:
Zachary Harris;Hilary Cain - 通讯作者:
Hilary Cain
Zachary Harris的其他文献
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