US-Egypt Cooperative Research: Friction Stir Welding of Superplastic Alloys

美埃合作研究：超塑性合金搅拌摩擦焊

• 批准号: 0108894
• 负责人: Jed Lyons
• 金额: $ 2.43万
• 依托单位: University of South Carolina at Columbia
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-15 至 2004-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0108894&HistoricalAwards=false
• 关键词: US; Egypt; Cooperative; Research; Friction

0108894LyonsDescription: This award is to support a collaborative project between Dr. Jed Lyons and Dr. Anthony Reynolds, both in the Department of Mechanical Engineering at the University of South Carolina, Columbia, South Carolina, and Dr. Hanadi Salem, Department of Mechanical Engineering, the American University in Cairo, Cairo, Egypt. They plan to develop manufacturing technologies for structural metals for the transportation industry. Specifically, research will be conducted to develop a fundamental understanding of the effects of friction stir welding (FSW) on the superplastic forming (SPF) behavior and ambient temperature properties of Al-Cu-Li sheets. FSW is a new solid-state welding process. Its advantages relative to traditional fusion welding techniques are primarily attributable to the fact that no melting is required. SPF alloys are good candidates for FSW due to the need to maintain a dynamically recrystallized fine grain microstructure. Preliminary collaborative work by the PIs indicates that SPF behavior can be retained in superplastic Weldalite 049 and 2095 aluminum alloys after FSW. An understanding of the role of FSW process variables on the constituent properties and microstructure through the weld nugget and adjacent thermo-mechanically affected zones (TMAZ) is required in order to make the process commercially viable. Research techniques and instruments to be employed include an instrumented friction stir welding machine, thermo-mechanical testing facilities for measuring tensile properties and SPF behavior, computer vision technology including digital image correlation and microstructural characterization with scanning electron microscope (SEM), transmission electron microscope (TEM) and optical microscopy and x-ray spectroscopy analysis. Scope: The project supports collaboration between two teams of investigators to carry out an important research project. The US team will be responsible for determining and investigating the FSW process conditions and for making the welds. They will test the FSW process at various conditions of weld and with various weldalite alloys with variable copper and lithium contents and different thickness. Dr. Salem will, with the assistance of a US graduate student, run the SPF tests and perform TEM investigations. Dr. Salem will also direct one of her graduate students at AUC in completing the optical and SEM examinations for the same alloys. Using the resources at both the University of South Carolina and the American University in Cairo, this project contributes to the development of combined FSW/SPF processes that enable the net-shape fabrication of complex multi-sheet structural components from custom blanks. The project will include two US scientists and one US graduate student who will gain experience in international cooperative research. The proposal meets the INT objective of supporting collaborative research in areas of mutual interest. This project is being supported under the US-Egypt Joint Fund Program, which provides grants to scientists and engineers in both countries to carry out these cooperative activities.

0108894 lyonsdescription：该奖项是为了支持Jed Lyons博士和Anthony Reynolds博士之间的合作项目，均在南卡罗来纳大学，哥伦比亚大学，南卡罗来纳大学的机械工程系，南卡罗来纳州，以及Hanadi Salem博士，Hanadi Salem博士，机械工程系，机械工程系，美国在Cairo，Cairo，Cairo，Cairo，Cairo，Cairo，Cairo，Cairo，Cairo，埃利普特，埃利普特，埃利普特。 他们计划开发用于运输行业结构金属的制造技术。 具体而言，将进行研究，以对摩擦搅拌焊接（FSW）对Al-Cu-LI板的巨型形成（SPF）行为和环境温度性能的影响进行基本了解。 FSW是一个新的固态焊接过程。 它相对于传统融合焊接技术的优势主要归因于不需要熔化的事实。 SPF合金是FSW的良好候选者，因为需要保持动态重结晶的细晶粒微观结构。 PIS的初步协作工作表明，在FSW之后，SPF行为可以保留在质量纤维石049和2095铝合金中。 为了使该过程在商业上可行，需要了解通过焊缝和相邻的热机械影响区域（TMAZ）对FSW过程变量对组成属性和微观结构的作用。 要使用的研究技术和仪器包括仪器摩擦搅拌焊接机，用于测量拉伸性特性和SPF行为的热机电测试设施，包括数字图像相关性和微观结构表征，具有扫描电子显微镜（SEM），传输电子显微镜（TEM）和光学显微镜和X射线镜头分析。范围：该项目支持两个调查人员团队之间的合作，以进行一个重要的研究项目。美国团队将负责确定和调查FSW流程条件和制造焊缝。 他们将在焊接的各种条件下以及具有可变铜和锂含量以及不同厚度的各种焊岩合金测试FSW工艺。 塞勒姆·威尔（Salem Will）博士在美国研究生的协助下进行了SPF测试并进行TEM调查。 塞勒姆博士还将指导她的一位研究生在AUC完成同一合金的光学和SEM检查。该项目利用南卡罗来纳大学和开罗的美国大学的资源，有助于开发FSW/SPF流程，从而使自定义空白的复杂多页结构组件的净形成能力。 该项目将包括两名美国科学家和一名美国研究生，他们将获得国际合作研究的经验。 该提案符合支持共同感兴趣领域的协作研究的INT目标。 该项目得到了美国埃及联合基金计划的支持，该计划为两国的科学家和工程师提供了这些合作活动的赠款。