CAREER: Understanding Elevated-Temperature Grain Boundary Deformation Processes of High-Temperature Structural Alloys through Grain Boundary Engineering

职业：通过晶界工程了解高温结构合金的高温晶界变形过程

基本信息

批准号：
0134789
负责人：
Carl Boehlert
金额：
$ 45.27万
依托单位：
Alfred University NY State College of Ceramics
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2002
资助国家：
美国
起止时间：
2002-08-15 至 2005-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0134789&HistoricalAwards=false
关键词：
CAREER Understanding Elevated Temperature Grain

项目摘要

This project aims at applying grain-boundary engineering to develop high-temperature structural alloys such as Ni-based superalloy and Ti2AlNb intermetallics. Major objective of the proposed project is to develop better understanding of the inter-relationship of processing steps, grain boundary character distribution (GBCD), and creep behavior of high-temperature structural alloys. The main goals of this study are ; (1) to process microstructures with a distribution of random and special grain boundaries; (2) to measure grain boundary character distribution (GBCD); (3) to perform creep testing of varied microstructures; (4) to model the effects of grain size, grain boundary sliding, and grain boundary character on mechanical behavior. The project leads to the development of a processing methodology useful to enhance the mechanical behavior of high-temperature structural materials. The educational outreach component incorporates the research tools used in the research portion of the project and contributes to an increase in the number of undergraduate students majoring in materials science and engineering (MS&E).%%%The research develops new understanding of the deformation mechanisms of structural materials beyond the present state of the art through grain-boundary engineering. The results are applicable for development of better materials for high-temperature applications. ***

该项目旨在应用晶界工程来开发高温结构合金，例如基于Ni的Superalloy和Ti2alnB Interallals。拟议项目的主要目的是更好地理解处理步骤，晶界特征分布（GBCD）和高温结构合金的蠕变行为的关系。这项研究的主要目标是；（1）以随机和特殊晶界的分布来处理微观结构；（2）测量晶界特征分布（GBCD）；（3）对各种微观结构进行蠕变测试；（4）建模晶粒尺寸，晶界滑动和晶界特征对机械行为的影响。该项目导致开发一种处理方法，可用于增强高温结构材料的机械行为。教育外展部分结合了项目研究部分中使用的研究工具，并有助于增加材料科学和工程专业的本科生数量（MS＆E）。%% %%研究对结构材料的变形机制进行了新的了解，而不是现有艺术状况通过晶粒工程学。结果适用于开发更好的材料用于高温应用。 ***