Experimental Investigation of Microstructural Effects on Deformation and Fracture Mechanisms in Nanostructured Metallic Materials

微观结构对纳米结构金属材料变形和断裂机制影响的实验研究

基本信息

项目摘要

PROJECT ABSTRACT: Experimental Investigation of Microstructural Effects on Deformation and Fracture Mechanisms in Nanostructured Metallic MaterialsThis proposal will be awarded using funds made available by the American Recovery and Reinvestment Act of 2009 (Public Law 111-5), and meets the requirements established in Section 2 of the White House Memorandum entitled, Ensuring Responsible Spending of Recovery Act Funds, dated March 20, 2009. I also affirm, as the cognizant Program Officer, that the proposal does not support projects described in Section 1604 of Division A of the Recovery Act. The research objective of this award is to experimentally investigate the effects of microstructure on the thermo-mechanical behavior of nanostructured metallic materials. Nanostructured metals (metals with grain sizes on the order of hundreds of nanometers) are an exciting class of materials that have shown the rare ability to be simultaneously strong and ductile. The effort in this award will focus on understanding the deformation mechanisms in these materials by quantifying the real-time development of full-field strain in grains and across grain boundaries, and relating this strain to the local microstructure as determined by in-situ electron backscatter diffraction. The research will utilize Aluminum, Magnesium, and their alloys as model materials to investigate the thermo-mechanical response of two very different crystallographic systems at ultra-fine grain sizes. The experimental and modeling efforts performed with this award will greatly enhance our understanding of the fundamental mechanics of intermediate grain sizes, and our ability to design and develop processing tools to tailor the mechanical properties of these materials. In addition to the fundamental impact of this research, understanding the deformation mechanisms in nanostructured Aluminum and Magnesium is of critical industry importance due to the suitability of these metals for superplastic forming. Project outreach includes a partnership with a local school system that involves the participation of graduate students in the investigator?s research group as Teaching Fellows, and the creation of a web-learning module on experimental techniques for middle school and high-school students.
项目摘要:纳米结构金属材料微观结构对变形和断裂机制影响的实验研究本提案将使用2009年美国复苏和再投资法案(公法111-5)提供的资金进行奖励,并符合白宫备忘录第2节中规定的要求,该备忘录题为“确保复苏法案资金的负责任支出”,日期为2009年3月20日。我还确认,作为认知项目官员,该提案不支持《恢复法》A部分第1604节所述的项目。该奖项的研究目标是实验研究微观结构对纳米结构金属材料热机械行为的影响。纳米结构金属(晶粒尺寸在数百纳米量级的金属)是一类令人兴奋的材料,它们显示出罕见的同时具有强度和延展性的能力。该奖项的工作重点是通过量化晶粒和晶界中全场应变的实时发展来了解这些材料的变形机制,并将此应变与原位电子背散射衍射确定的局部微观结构相关联。该研究将利用铝、镁及其合金作为模型材料,研究两种非常不同的结晶系统在超细晶粒尺寸下的热机械响应。该奖项的实验和建模工作将大大提高我们对中间晶粒尺寸基本力学的理解,以及我们设计和开发加工工具以定制这些材料的机械性能的能力。除了这项研究的基本影响外,了解纳米结构铝和镁的变形机制对于工业至关重要,因为这些金属适合于超塑性成形。项目推广包括与当地学校系统的伙伴关系,涉及研究生参与调查?的研究小组作为教学研究员,并创建了一个网络学习模块的实验技术,为初中和高中学生。

项目成果

期刊论文数量(0)
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Samantha Daly其他文献

Dark field X-ray microscopy below liquid-helium temperature: The case of NaMnOsub2/sub
液氦温度下的暗场 X 射线显微镜:以 NaMnO₂为例
  • DOI:
    10.1016/j.matchar.2023.113174
  • 发表时间:
    2023-10-01
  • 期刊:
  • 影响因子:
    5.500
  • 作者:
    Jayden Plumb;Ishwor Poudyal;Rebecca L. Dally;Samantha Daly;Stephen D. Wilson;Zahir Islam
  • 通讯作者:
    Zahir Islam
Experimental assessment of toughness in ceramic matrix composites using the J-integral with digital image correlation part I: methodology and validation
使用具有数字图像相关性的 J 积分对陶瓷基复合材料的韧性进行实验评估第一部分:方法和验证
  • DOI:
  • 发表时间:
    2015
  • 期刊:
  • 影响因子:
    4.5
  • 作者:
    J. Tracy;A. Waas;Samantha Daly
  • 通讯作者:
    Samantha Daly
Deformation twinning and detwinning in extruded Mg-4Al: emIn-situ/em experiment and crystal plasticity simulation
  • DOI:
    10.1016/j.ijplas.2022.103345
  • 发表时间:
    2022-08-01
  • 期刊:
  • 影响因子:
    12.800
  • 作者:
    Mohammadreza Yaghoobi;Zhe Chen;Aeriel D. Murphy-Leonard;Veera Sundararaghavan;Samantha Daly;John E. Allison
  • 通讯作者:
    John E. Allison
Toward Reliable Ad-hoc Scientific Information Extraction: A Case Study on Two Materials Datasets
实现可靠的临时科学信息提取:两种材料数据集的案例研究
  • DOI:
  • 发表时间:
    2024
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Satanu Ghosh;Neal R. Brodnik;C. Frey;Collin S. Holgate;T.M. Pollock;Samantha Daly;Samuel Carton
  • 通讯作者:
    Samuel Carton
The microstructure length scale of strain rate sensitivity in ultrafine-grained aluminum
  • DOI:
    10.1557/jmr.2015.58
  • 发表时间:
    2015-04-01
  • 期刊:
  • 影响因子:
    2.900
  • 作者:
    Adam D. Kammers;Jittraporn Wongsa-Ngam;Terence G. Langdon;Samantha Daly
  • 通讯作者:
    Samantha Daly

Samantha Daly的其他文献

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{{ truncateString('Samantha Daly', 18)}}的其他基金

HDR IDEAS^2 Institute: Data-Driven Frameworks for Materials Discovery
HDR IDEAS^2 Institute:材料发现的数据驱动框架
  • 批准号:
    1934641
  • 财政年份:
    2019
  • 资助金额:
    $ 32.01万
  • 项目类别:
    Continuing Grant
Understanding the Interactions between Recoverable and Permanent Deformations in Shape Memory Alloys
了解形状记忆合金中可恢复变形和永久变形之间的相互作用
  • 批准号:
    1851603
  • 财政年份:
    2019
  • 资助金额:
    $ 32.01万
  • 项目类别:
    Standard Grant
CAREER: Understanding Micromechanisms of Fatigue in Shape Memory Alloys
职业:了解形状记忆合金疲劳的微观机制
  • 批准号:
    1756393
  • 财政年份:
    2017
  • 资助金额:
    $ 32.01万
  • 项目类别:
    Standard Grant
CAREER: Understanding Micromechanisms of Fatigue in Shape Memory Alloys
职业:了解形状记忆合金疲劳的微观机制
  • 批准号:
    1251891
  • 财政年份:
    2013
  • 资助金额:
    $ 32.01万
  • 项目类别:
    Standard Grant

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使用 3D 研究预处理对选定脉冲微观结构变化的影响
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