Collaborative Research: DMREF: Uncovering Mechanisms of Grain Boundary Migration in Polycrystals for Predictive Simulations of Grain Growth
合作研究:DMREF:揭示多晶晶界迁移机制,用于晶粒生长的预测模拟
基本信息
- 批准号:2246833
- 负责人:
- 金额:$ 37.04万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2022
- 资助国家:美国
- 起止时间:2022-10-15 至 2025-09-30
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
NON-TECHNICAL SUMMARYMost solid materials, including metals, ceramics, and even some polymers, have an internal network of grain boundaries that separate individual crystals. This grain boundary network strongly influences materials properties and, therefore, is important for the design of automobiles, aircraft, computers, and many other devices. The goal of this research is to develop accurate predictive simulations for the evolution of the grain boundary network in metals and ceramics. These simulations will accelerate the incorporation of polycrystalline components into devices and structures by defining processing conditions to achieve specific microstructures and properties. The project will rely on iterative feedback between experimental observations of grain growth, new theories for grain boundary migration, and computer simulations of the evolution of the grain boundary network. In this way, it is aligned with the Materials Genome Initiative.TECHNICAL SUMMARYThe structure of the grain boundary network is determined by grain boundary migration when the material is processed at high temperature. Therefore, controlling materials properties is predicated on understanding and controlling grain boundary migration. The two prevailing models for grain boundary migration are diffusive migration and defect-controlled migration. To accurately simulate microstructure evolution, it is necessary to know if, and under what conditions, these two models provide an accurate description of grain boundary migration. X-ray microscopy will be used to measure the structure of the grain boundary networks in ferritic iron, nickel, and strontium titanate, and how they evolve with time. In situ heating experiments will be used to measure the migration rates of grain boundaries in polycrystals as a function of temperature. The results will be compared to atomistic simulations of grain boundary migration and to predictions from two theories for grain boundary migration to determine which one provides a superior description of the temperature dependence. The mechanistic information will then be used to parameterize three-dimensional mesoscale grain growth models. The outcome of this process can then guide the experiments to the most important temperature ranges or time scales for annealing. Understanding the mechanism of interface migration will make it possible to better predict microstructure evolution, a necessary step in accelerating the development of polycrystalline materials.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.
大多数固体材料,包括金属,陶瓷,甚至一些聚合物,都有一个内部的晶界网络,将单个晶体分开。这种晶界网络强烈地影响材料性能,因此对于汽车、飞机、计算机和许多其他设备的设计很重要。本研究的目标是开发精确的预测模拟金属和陶瓷中晶界网络的演变。这些模拟将通过定义加工条件来实现特定的微观结构和性能,从而加速将多晶组件纳入器件和结构中。该项目将依赖于晶粒生长的实验观察,晶界迁移的新理论和晶界网络演化的计算机模拟之间的迭代反馈。通过这种方式,它与材料基因组计划(Materials Genome Initiative)保持一致。技术概述当材料在高温下加工时,晶界网络的结构由晶界迁移决定。因此,控制材料性能的前提是理解和控制晶界迁移。晶界迁移的两种主要模型是扩散迁移和缺陷控制迁移。为了准确地模拟微观结构的演变,有必要知道这两个模型是否以及在什么条件下提供了晶界迁移的准确描述。X射线显微镜将用于测量铁素体铁、镍和钛酸锶中晶界网络的结构,以及它们如何随时间演变。原位加热实验将用于测量作为温度函数的多晶体中晶界的迁移速率。结果将进行比较,原子模拟晶界迁移和预测从两个理论晶界迁移,以确定哪一个提供了一个上级的温度依赖性的描述。机械信息,然后将用于参数化三维介观尺度晶粒生长模型。然后,该过程的结果可以将实验引导到最重要的退火温度范围或时间尺度。了解界面迁移的机制将使更好地预测微观结构演变成为可能,这是加速多晶材料开发的必要步骤。该奖项反映了NSF的法定使命,并通过使用基金会的知识价值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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会议论文数量(0)
专利数量(0)
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Amanda Krause其他文献
The association between problematic school behaviours and social and emotional development in children seeking mental health treatment
寻求心理健康治疗的儿童的问题学校行为与社交和情感发展之间的关联
- DOI:
- 发表时间:
2020 - 期刊:
- 影响因子:0
- 作者:
Amanda Krause;Briana J. Goldberg;B. D’Agostino;Amy Klan;Maria A. Rogers;J. D. Smith;J. Whitley;Michael J. G. Hone;Natasha McBrearty - 通讯作者:
Natasha McBrearty
School Absenteeism and Child Mental Health: A Mixed-Methods Study of Internalizing and Externalizing Symptoms
- DOI:
10.1007/s12310-024-09640-2 - 发表时间:
2024-03-08 - 期刊:
- 影响因子:3.700
- 作者:
Maria A. Rogers;Amy Klan;Rylee Oram;Amanda Krause;Jess Whitley;David J. Smith;Natasha McBrearty - 通讯作者:
Natasha McBrearty
Five years of screening for galactosaemia in South Africa: Pitfalls of using Benedict’s test and thin layer chromatography to screen for galactosaemia in a developing country
- DOI:
10.1016/j.cca.2020.02.018 - 发表时间:
2020-06-01 - 期刊:
- 影响因子:
- 作者:
Tumelo M. Satekge;Olivia Kiabilua;Amanda Krause;Tahir S. Pillay - 通讯作者:
Tahir S. Pillay
Huntington disease-like 2: insight into neurodegeneration from an African disease
亨廷顿舞蹈病样 2:从一种非洲疾病深入了解神经退行性变
- DOI:
10.1038/s41582-023-00906-y - 发表时间:
2023-12-19 - 期刊:
- 影响因子:33.100
- 作者:
Amanda Krause;David G. Anderson;Aline Ferreira-Correia;Jessica Dawson;Fiona Baine-Savanhu;Pan P. Li;Russell L. Margolis - 通讯作者:
Russell L. Margolis
QF-PCR: a valuable first-line prenatal and postnatal test for common aneuploidies in South Africa
- DOI:
10.1007/s12687-022-00587-y - 发表时间:
2022-03-15 - 期刊:
- 影响因子:1.800
- 作者:
Laura Cottino;Venesa Sahibdeen;Maria Mudau;Nakedi Lekgate;Amanda Krause - 通讯作者:
Amanda Krause
Amanda Krause的其他文献
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{{ truncateString('Amanda Krause', 18)}}的其他基金
Collaborative Research: Plastic Ceramics: The Role of Grain Boundaries During Laser Shock Peening
合作研究:塑料陶瓷:晶界在激光冲击强化过程中的作用
- 批准号:
2246121 - 财政年份:2022
- 资助金额:
$ 37.04万 - 项目类别:
Standard Grant
CAREER: Designing Ceramic Microstructures by Controlling Anisotropic Grain Boundary Motion
职业:通过控制各向异性晶界运动设计陶瓷微结构
- 批准号:
2143572 - 财政年份:2022
- 资助金额:
$ 37.04万 - 项目类别:
Continuing Grant
CAREER: Designing Ceramic Microstructures by Controlling Anisotropic Grain Boundary Motion
职业:通过控制各向异性晶界运动设计陶瓷微结构
- 批准号:
2246305 - 财政年份:2022
- 资助金额:
$ 37.04万 - 项目类别:
Continuing Grant
Collaborative Research: DMREF: Uncovering Mechanisms of Grain Boundary Migration in Polycrystals for Predictive Simulations of Grain Growth
合作研究:DMREF:揭示多晶晶界迁移机制,用于晶粒生长的预测模拟
- 批准号:
2118864 - 财政年份:2021
- 资助金额:
$ 37.04万 - 项目类别:
Continuing Grant
Collaborative Research: Plastic Ceramics: The Role of Grain Boundaries During Laser Shock Peening
合作研究:塑料陶瓷:晶界在激光冲击强化过程中的作用
- 批准号:
2023314 - 财政年份:2020
- 资助金额:
$ 37.04万 - 项目类别:
Standard Grant
MRI: Acquisition of Nano-resolution Zeiss Xradia 620 Versa X-ray Computed Tomography with Phase Contrast and Lab Diffraction Contrast Tomography
MRI:获取纳米分辨率 Zeiss Xradia 620 Versa X 射线计算机断层扫描(相衬)和实验室衍射对比断层扫描
- 批准号:
2017977 - 财政年份:2020
- 资助金额:
$ 37.04万 - 项目类别:
Standard Grant
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