GOALI: Friction Stir Forming Process for Joining Dissimilar Metals

GOALI：用于连接异种金属的搅拌摩擦成形工艺

• 批准号: 1131845
• 负责人: Scott Miller
• 金额: $ 28.47万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1131845&HistoricalAwards=false
• 关键词: GOALI; Friction; Stir; Forming; Process

This Grant Opportunity for Academic Liason with Industry (GOALI) award supports the study of a new forming process to create a mechanical joint between dissimilar materials. Friction stir forming will be studied by experimental, modeling, and material analyses. The intrinsic process forces and temperature will be measured. The effect of process parameters on the material deformation and joint strength will be experimentally investigated. A more accurate modeling prediction of thermo-mechanical material behavior will be made. A complete metallurgical analysis will be conducted to characterize the effect of friction stir forming on the work material grain structure. This new, efficient process has a relatively small environmental footprint and will be capable of simultaneously heating and forming the work material into a strong dissimilar material joint. If successful, this new joining process will result in a stronger, lighter joint made entirely from the parent material in a variety of dissimilar materials. The process is a quick one-step process without the need for external fasteners, fluids, or any other material. In traditional joining methods, such as fusion processes, joint strength in dissimilar metal joints is limited. The major goal of this research is to establish the link among the force/heat input, material structure, material properties, and resulting joint strength. The nature of work material forming at high temperature will be fully characterized and the proposed work will contribute extensive knowledge about material forming by friction stir processes. This research will stimulate new avenues and applications for friction stir processes, and make them suitable for a wide range of materials. General Motors is a partner in the research and will implement the process into the manufacture of their automotive body structures.

该学术利亚森（Liason）获得行业（Goari）奖的赠款机会支持了对新成型过程的研究，以在不同的材料之间建立机械关节。 通过实验，建模和材料分析，将研究摩擦搅拌的形成。 将测量内在的过程力和温度。 过程参数对材料变形和关节强度的影响将进行实验研究。 将对热机械材料行为进行更准确的建模预测。 将进行完整的冶金分析，以表征摩擦搅拌对工作材料晶粒结构的影响。 这个新的，有效的过程具有相对较小的环境足迹，并且能够同时加热并形成工作材料成强大的材料关节。如果成功的话，这个新的加入过程将导致完全由各种不同材料的母材料制成的更强大，更轻的关节。该过程是一个快速的一步过程，而无需外部紧固件，流体或任何其他材料。 在传统的连接方法（例如融合过程）中，不同金属接头中的关节强度受到限制。 这项研究的主要目的是在力/热输入，材料结构，材料特性和产生的关节强度之间建立联系。 在高温下形成的工作材料的性质将被充分表征，拟议的工作将有助于广泛了解摩擦搅拌过程形成的材料。 这项研究将刺激新的途径和应用于摩擦搅拌过程，并使其适合多种材料。 通用汽车是研究的合作伙伴，将实施该过程的汽车结构。