U.S.-Egypt Cooperative Research: Innovative Technology for Improving Wear Resistance and Fracture Toughness of Austempered Ductile Iron

0431481 ElSawy描述：该奖项旨在支持位于田纳西州库克维尔的田纳西理工大学制造和工业技术系的Ahmed El Sawy博士和位于埃及赫勒万的中央冶金研究与发展研究所（CMRDI）金属铸造系的Khaled Abouelela博士之间的合作研究。 他们计划研究创新技术，通过热机械或两步等温淬火工艺提高汽车工业用等温淬火球墨铸铁（ADI）的耐磨性和断裂韧性。汽车行业正在不断研究生产持久和更便宜的部件的方法，以保持在市场上的竞争力。 ADI用于制造曲轴、凸轮轴和齿轮。 由于其高强度，良好的延展性，良好的耐磨性和断裂韧性，它被认为是一个有吸引力的替代品，为锻造或锻钢零件。本工作旨在通过采用形变热处理工艺生产等温-等温淬火球墨铸铁（AADI）或采用新的两步等温淬火工艺来进一步提高常规ADI的机械性能。PI将研究非合金以及含有不同量Ni、Mo和Cu的合金ADI。断裂韧性之间的关系，在热机械处理过程中的高度减少率和微观结构变量，如残余奥氏体量，奥氏体碳含量，形成的贝氏体组织的类型和基体硬度。同时，还将利用有限元法确定这些ADI的断裂韧性和耐磨性的预测方程。范围和更广泛的影响：该项目将使我们更好地了解正在研究的ADI的耐磨性，静态和动态行为，以便我们能够设计和生产耐用的汽车部件，同时降低成本。 埃及的汽车工业也在增长，因此采用这种技术将生产出负担得起的汽车。 将与汽车行业联系并通知其可能参与并为项目这一阶段的实施做出贡献。 TTU和CMRDI科学家之间的合作安排将促进两个机构之间的研究和教育联系，并在两个机构的人员之间交流专业知识和知识。 研究生和本科生将参与两所合作院校的项目，研究结果将纳入其相关课程。此外，这项研究的结果将通过在专业期刊和专业会议上发表而传播给工程界。该项目得到了美国-埃及联合基金方案的支持，该方案向两国的科学家和工程师提供赠款，以开展这些合作活动。

0431481ElSawyDescription: This award is to support a cooperative research between Dr. Ahmed El Sawy, Department of Manufacturing and Industrial Technology, Tennessee Technological University, Cookeville, Tennessee and Dr. Khaled Abouelela, Metal Casting Department, Central Metallurgical Research and Development Institute (CMRDI), Helwan, Egypt. They plan to study innovative technology for improving wear resistance and fracture toughness of austempered ductile iron (ADI) used for automotive industry by either thermomechanical or two-step austempering processes. The automotive industry is continuously investigating means for producing long lasting and cheaper parts to stay competitive in the market place. ADI is used for manufacturing crankshafts, camshafts and gears. Because of its high strength, good ductility, good wear resistance and fracture toughness, it is considered an attractive substitute for wrought or forged steel parts. This work is aimed to further improve the mechanical properties of the conventional ADI by applying either thermomechanical process for producing ausformed-austempered ductile iron (AADI) or using a novel two-step austempering process. The PIs will investigate both unalloyed as well as alloyed ADI with different amounts of Ni, Mo and Cu. The relationship between fracture toughness, reduction ratio in height during the thermomechanical processing and the microstructural variables such as amount of retained austenite, austenite carbon content, type of formed bainitic structure and matrix hardness will be determined. At the same time, the prediction equations of fracture toughness and wear resistance of those ADIs will be also determined using the finite element method.Scope and broader impacts: The project will provide a better understanding of the wear resistance, static and dynamic behaviors of those ADIs under investigation so we can design and produce long-lasting automotive parts while reducing costs. The automotive industry is growing also in Egypt, so adopting such technology will produce affordable cars. Automotive industry will be contacted and informed for possible participation and contribution toward the implementation of this phase of the project. The collaborative arrangement between scientists at TTU and CMRDI will promote research as well as educational ties between the two institutions, with an exchange of expertise and knowledge between people at both institutions. Graduate and undergraduate students will be involved in the project at the two partnering institutions, and the findings will be incorporated in their relevant courses. Furthermore, the results of this study will be disseminated to the engineering community through publication in refereed journals and professional conferences. 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.