课题基金 / 基金详情

Probing the Evolution of Granular Microstructures during Dynamic Annealing via Integrated Three-Dimensional Experiments and Simulations

Probing the Evolution of Granular Microstructures during Dynamic Annealing via Integrated Three-Dimensional Experiments and Simulations
通过集成三维实验和模拟探讨动态退火过程中颗粒微观结构的演变
批准号:
2104786
负责人:
Katsuyo Thornton
金额:
$57.24万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
2021
资助国家:
美国
项目状态:
已结题
起止时间:
2021-08-15 至 2024-07-31

项目摘要

项目成果

Katsuyo Thornton的其他基金

相似基金

相关文献

中文摘要
翻译
点击翻译按钮获取中文摘要
英文摘要
Non-technical SummaryMany metallic materials are polycrystalline, in which a solid consists of many tiny crystals (“grains”) with different orientations. In some cases, superior properties can be achieved when the material is made in a single-crystal form, as in the case for jet-engine turbine blades, shape-memory alloys, and solar cells. However, single crystals are expensive and time-consuming to produce. Recently researchers have found that single crystals can be produced through abnormal grain growth induced by cyclic heat treatment, where the metal alloy is heated and cooled repeatedly. During abnormal grain growth, a few grains preferentially grow by engulfing the neighboring grains. The goal of this project is to discover why and how this process occurs. The project integrates emergent research in experimental characterization and simulations of the grain growth process, capitalizing on the ability to watch the evolution of the polycrystalline microstructure in real-time and leveraging high-performance computing to simulate microstructural evolution. Developing the fundamental understanding of abnormal grain growth could lead to a paradigm shift in the manufacture of single-crystalline materials, and therefore it promotes global competitiveness in manufacturing and technology and national prosperity. The project also promotes the development of a highly trained future workforce; two graduate students are trained in state-of-the-art techniques in experiments, modeling, simulations, and data analysis. Outreach activities are carried out through the Females Excelling More in the Math, Engineering, and the Sciences program and Washtenaw Elementary Science Olympiad and include a virtual reality demonstration that allows students to walk through an evolving microstructure during heat treatment. Technical SummaryA cyclic heat treatment, in which precipitates are repeatedly formed and dissolved by thermal cycling, holds promise for solid-state processing of single crystals and otherwise large-grained materials via abnormal grain growth. However, its full potential has not been realized due to the poor understanding of the mechanisms underlying the process. The objective of this project is to advance the science governing the growth of the abnormal grains during non-isothermal annealing. The following fundamental questions are addressed: What is the mechanism by which abnormal grain growth is initiated under dynamic thermal environment? Which grains are most likely to become abnormal and what are their microstructural signatures? How does the abnormal grain grow into new microstructural neighborhoods? To answer these questions, emergent research in structural characterization, phase-field and phase-field-crystal modeling, and graph theory methods are synergistically integrated. High-resolution synchrotron-based X-ray diffraction microscopy is utilized to visualize and quantify the evolution of the grain and subgrain network in real-time and also enable microstructural evolution simulations based on the measured space-, time-, and orientation-resolved datasets as initial conditions. The resulting high-dimensional data is then distilled into a network model that succinctly describes the granular and the local driving forces for grain boundary motion, which significantly reduces the computational cost of predicting the microstructural evolution. Scientific understanding of abnormal grain growth upon thermal cycling ultimately informs the process design of single-crystal fabrication.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.
期刊论文(0)
专著(0)
科研奖励(0)
会议论文
Summer School for Integrated Computational Materials Education
Elements: Data Driven Autonomous Thermodynamic and Kinetic Model Builder for Microstructural Simulations
Harnessing Abnormal Grain Growth for the Production of Single Crystals
GOALI: Collaborative Research: An Experimental and Theoretical Study of the Microstructural and Electrochemical Stability of Solid Oxide Cells
国内基金
海外基金
Galaxy Analytical Modeling Evolution (GAME) and cosmological hydrodynamic simulations.
  • 批准号:
  • 项目类别:
    省市级项目
  • 资助金额:
    10.0万元
  • 批准年份:
    2025
  • 负责人:
    Antonios Katsianis
  • 依托单位:
Understanding structural evolution of galaxies with machine learning
  • 批准号:
  • 项目类别:
    省市级项目
  • 资助金额:
    10.0万元
  • 批准年份:
    2022
  • 负责人:
    Nicola Rosario Napolitano
  • 依托单位:
The formation and evolution of planetary systems in dense star clusters
  • 批准号:
    11043007
  • 项目类别:
    专项基金项目
  • 资助金额:
    10.0万元
  • 批准年份:
    2010
  • 负责人:
    柯文采
  • 依托单位:
Improving modelling of compact binary evolution.
  • 批准号:
    10903001
  • 项目类别:
    青年科学基金项目
  • 资助金额:
    20.0万元
  • 批准年份:
    2009
  • 负责人:
    史蒂芬
  • 依托单位: