GOALI: Crack Repair of Irradiated Stainless Steel by Friction Stir Processing
GOALI:通过搅拌摩擦加工修复辐照不锈钢裂纹
基本信息
- 批准号:1405508
- 负责人:
- 金额:$ 30万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2014
- 资助国家:美国
- 起止时间:2014-07-01 至 2018-04-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This Grant Opportunity for Academic Liaison with Industry (GOALI) award supports fundamental research to uncover the mechanisms of sigma phase and chromium carbide formation in friction stir processed austenitic stainless steel. An Eulerian finite element approach will be used to predict temperatures, strains, and strains rates in the stir zone so that fraction recrystallization can be predicted for different tool speeds and feed rates. The modeling work will be combined with experiments to test the hypothesis that sigma phase and chromium carbide formation can be minimized or eliminated when friction stir processing is done under conditions that avoid dynamic recrystallization. Phase identification will be performed on processed specimens by electron backscatter diffraction and by transmission electron microscopy for model validation. Hot cell experiments on irradiated stainless steel will test a second hypothesis that friction stir processing can be done without causing helium cracking in the heat affected zone of the stirred region. This research will provide fundamental understanding of the role of recrystallization on sigma phase and chromium carbide formation in friction stir processed austenitic stainless steel. A new approach for repairing stress corrosion cracks in nuclear components will emerge from the fundamental research results. As current fusion welding processes cause helium cracking during repair of components that have been irradiated for twenty or more years, this new approach has the potential of overcoming a major technical challenge in maintaining our fleet of aging reactors, which is critical to the national energy infrastructure and the economy. Additional societal benefits include the education of students who will be prepared to contribute to the nuclear industry, and an outreach program working with high school teachers on new curriculum development, aimed at encouraging female students to pursue careers in science and engineering.
这一学术联系机会奖(GOALI)支持基础研究,以揭示搅拌摩擦处理奥氏体不锈钢中Sigma相和碳化铬形成的机制。将使用欧拉有限元方法来预测搅拌区的温度、应变和应变率,从而可以预测不同刀具速度和进给速度下的分数再结晶。建模工作将与实验相结合,以验证在避免动态再结晶的条件下进行搅拌摩擦处理可以最大限度地减少或消除Sigma相和碳化铬形成的假设。将通过电子背散射衍射和透射电子显微镜对处理后的样品进行物相鉴定,以验证模型的有效性。对辐照不锈钢进行的热室实验将检验第二个假设,即可以在搅拌区域的热影响区进行摩擦搅拌处理,而不会导致氦破裂。本研究将对搅拌摩擦处理奥氏体不锈钢中再结晶对Sigma相和碳化铬形成的影响提供基础性的认识。基础性研究成果将为修复核构件应力腐蚀裂纹开辟新的途径。由于当前的熔化焊接工艺会在修复辐照了20年或更长时间的部件时导致氦气破裂,这种新方法有可能克服在维护我们的老化反应堆机队方面的重大技术挑战,这对国家能源基础设施和经济至关重要。其他社会福利包括对准备为核工业做出贡献的学生的教育,以及一个与高中教师合作开发新课程的外联计划,旨在鼓励女学生从事科学和工程职业。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Michael Miles其他文献
Interpretation of the stress dip test as a means of characterizing backstress: Experiments and backstress-aided crystal plasticity modeling of polycrystalline tantalum
应力骤降试验作为表征背应力的一种手段的解释:多晶钽的实验和背应力辅助晶体塑性建模
- DOI:
10.1016/j.ijplas.2024.104089 - 发表时间:
2024-10-01 - 期刊:
- 影响因子:12.800
- 作者:
Sajjad Izadpanah Najmabad;David Fullwood;Tristan Russell;Marko Knezevic;Michael Miles - 通讯作者:
Michael Miles
Tu1570 - Reduced Coenzyme Q10 Levels are Associated with Advanced Fibrosis in Adults with Nonalcoholic Steatohepatitis
- DOI:
10.1016/s0016-5085(17)34004-0 - 发表时间:
2017-04-01 - 期刊:
- 影响因子:
- 作者:
Sarah Kemme;Michael Miles;Rohit Loomba;Stavra Xanthakos;Rohit Kohli - 通讯作者:
Rohit Kohli
Flattening of Diluted Species Profile via Passive Geometry in a Microfluidic Device
通过微流体装置中的被动几何形状平坦化稀释物质轮廓
- DOI:
- 发表时间:
2019 - 期刊:
- 影响因子:3.4
- 作者:
Michael Miles;Biddut Bhattacharjee;N. Sridhar;A. K. Fajrial;Kerri A. Ball;Yung;M. H. Stowell;W. Old;X. Ding - 通讯作者:
X. Ding
Friction stir spot welded joints of 409L stainless steels fabricated by a convex shoulder tool
- DOI:
10.1007/s12540-013-6017-8 - 发表时间:
2013-09-30 - 期刊:
- 影响因子:4.000
- 作者:
Md. Abu Mowazzem Hossain;Md. Tariqul Hasan;Sung-Tae Hong;Michael Miles;Hoon-Hwe Cho;Heung Nam Han - 通讯作者:
Heung Nam Han
Numerical Simulation of the Friction Stir Welding Process Using both Lagrangian and Arbitrary Lagrangian Eulerian Formulations
使用拉格朗日和任意拉格朗日欧拉公式对搅拌摩擦焊过程进行数值模拟
- DOI:
10.1063/1.1766702 - 发表时间:
2004 - 期刊:
- 影响因子:0
- 作者:
S. Guerdoux;L. Fourment;Michael Miles;Carl Sorensen - 通讯作者:
Carl Sorensen
Michael Miles的其他文献
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{{ truncateString('Michael Miles', 18)}}的其他基金
GOALI/Collaborative Research: Strain Gadient Plasticity Modeling to Link Microstructural Non-Local Effects of Dislocation/Interface Interactions with Ductility and Springback
GOALI/合作研究:应变梯度塑性建模将位错/界面相互作用的微观结构非局部效应与延展性和回弹联系起来
- 批准号:
1926662 - 财政年份:2019
- 资助金额:
$ 30万 - 项目类别:
Standard Grant
High Speed Friction Stir Spot Welding: A New Approach to Spot Joining of Ultra High Strength Steel
高速搅拌摩擦点焊:超高强度钢点焊的新方法
- 批准号:
1131203 - 财政年份:2011
- 资助金额:
$ 30万 - 项目类别:
Standard Grant
SGER: Friction Bit Joining - A New Solid State Spot Joining Process
SGER:摩擦钻头连接 - 一种新的固态点连接工艺
- 批准号:
0834729 - 财政年份:2008
- 资助金额:
$ 30万 - 项目类别:
Standard Grant
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