CAREER: Engineered Dendritic Microstructures

职业:工程树枝状微结构

基本信息

项目摘要

This Career award to University of Nevada, Reno is to advance scientific understanding of dendritic solidification, and to apply this knowledge to improve modern metal casting methods. The principal technical goal of this effort is to use pressure oscillations, applied to a melt during solidification, to enhance the control over solidification morphologies during casting. Periodic pressure pulses will be applied during the casting process to stimulate the formation of dendrite secondary arms at a desired frequency, thereby establishing the secondary arm spacing that many important mechanical properties derive from. Cast samples will subsequently be characterized for key microstructural features (such as dendrite arm spacings) and mechanical properties (such as tensile strength). Educational and outreach programs of this Career award include the development of interdisciplinary science education, and the creation of computer-based learning modules that augment lectures and connect students in the classroom directly with the PI's research efforts. Additionally, the educational efforts will be leveraged by bringing local high school teachers into the lab during the summer, with the ultimate goal of developing new curricula for use in high schools. In metallurgy, dendritic (tree-like) crystal microstructures are the predominant morphological form of the cast microstructure. The characteristics of a dendritic microstructure are known to significantly affect many important material properties such as strength and ductility, which may be controlled to an extent by controlling the casting process. This award is to develop new parameters, which will significantly expand the range of control over cast microstructures and the resulting material properties. Pressure pulses will be utilized to stimulate the creation of regularly spaced dendrite branches with controlled properties. Education plans include the development of interdisciplinary science education, and the creation of computer-based learning modules that augment lectures and connect students in the classroom directly with research. Additionally, local high school teachers, during the summer, will participate in the ongoing research activities, and are encouraged to develop new curricula for use in their own classrooms.
内华达州大学里诺分校的职业奖旨在促进对枝晶凝固的科学理解,并将这些知识应用于改进现代金属铸造方法。这种努力的主要技术目标是使用在凝固期间施加到熔体的压力振荡,以增强在铸造期间对凝固形态的控制。 在铸造过程中将施加周期性压力脉冲,以在期望的频率下刺激枝晶次级臂的形成,从而建立次级臂间距,许多重要的机械性能源自该次级臂间距。 随后将对铸造样品的关键微观结构特征(如枝晶臂间距)和机械性能(如拉伸强度)进行表征。 该职业奖的教育和推广计划包括跨学科科学教育的发展,以及基于计算机的学习模块的创建,这些模块增强了讲座并将课堂上的学生直接与PI的研究工作联系起来。 此外,教育工作将通过在夏季将当地高中教师带入实验室来发挥作用,最终目标是开发高中使用的新课程。在冶金学中,树枝状(树状)晶体显微组织是铸造显微组织的主要形态形式。 已知树枝状微观结构的特征显著影响许多重要的材料性质,例如强度和延展性,其可以通过控制铸造工艺而在一定程度上被控制。该奖项旨在开发新的参数,这将大大扩大对铸造微观结构和材料性能的控制范围。 将利用压力脉冲来刺激具有受控性质的规则间隔的枝晶分支的产生。 教育计划包括发展跨学科科学教育,创建基于计算机的学习模块,以增强讲座并将课堂上的学生与研究直接联系起来。 此外,当地高中教师将在夏季参加正在进行的研究活动,并鼓励他们制定新的课程供自己的教室使用。

项目成果

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Jeffrey LaCombe其他文献

S-STEM: Creating Retention and Engagement for Academically Talented Engineers
S-STEM:为有学术才华的工程师创造保留和参与度
S-STEM: Creating Retention and Engagement for Academically Talented Engineers - successes and challenges
S-STEM:为有学术才华的工程师创造保留和参与 - 成功和挑战

Jeffrey LaCombe的其他文献

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{{ truncateString('Jeffrey LaCombe', 18)}}的其他基金

The E-Scholars Program: Fostering Engineering Careers in Energy
电子学者计划:促进能源工程职业
  • 批准号:
    0966350
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
Materials Science as an Avenue for Interdisciplinary SMET Education
材料科学作为跨学科 SMET 教育的途径
  • 批准号:
    0127262
  • 财政年份:
    2002
  • 资助金额:
    --
  • 项目类别:
    Standard Grant

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