GOALI: Characterization, Modeling, and Optimization of Magnetic Pulse Welding Processes

该奖项的研究目标是通过与工业合作伙伴Magneform和UNH机械工程，物理学和材料科学的教职员工合作，对磁脉冲焊接（MPW）工艺进行基本了解。虽然MPW作为一种工艺已经使用了几十年，但该工艺通常是基于经验和试错实验来实现的。本研究的主要任务是对轴对称MPW接头进行实验研究，包括变形的测量;对焊缝界面和最终接头的力学性能进行材料测试;对焊接过程中的电磁、热机械效应进行建模（这将允许相变）和在焊接界面处的波形成;以及基于实验和建模努力来优化工艺参数。如果成功，这项研究的结果将有利于整个社会，通过减少结构的重量，因为不同的金属将被有效地焊接，因此重量较轻的部件将位于非强度关键区域。此外，这项研究将大大增加在高速率变形和冲击条件下的建模和材料表征，如电磁成形，弹道冲击等与Magneform合作提供了几个优势，包括广泛传播的结果到行业。研究生将受益于研究的跨学科性质，并将结果纳入几门课程。最后，教师参与者的研究经验将参与研究，并将根据项目的物理学和磁学方面为高中课堂创建模块。该项目由&土木、机械和制造创新（CMMI）部门的材料加工制造（MPM）项目、化学、生物工程、环境、能源和能源部门的热传输过程（TTP）项目、材料加工制造（MPM）项目和材料加工制造（MPM）项目共同资助。和运输系统（CBET）司，并授予机会与行业学术联络（GOALI）计划，工业创新和合作伙伴关系（IIP）司，所有在工程局（ENG）。

The research objective of this Grant Opportunity for Academic Liaison with Industry (GOALI) award is to create a fundamental understanding of the Magnetic Pulsed Welding (MPW) process through a collaboration with an industrial partner Magneform and UNH faculty members from Mechanical Engineering, Physics, and Materials Science. While MPW has been used as a process for decades, the process is typically implemented based on experience and trial and error experimentation. The tasks of the proposed research are to experimentally investigate axisymmetric MPW joints including measurement of the deformation; to conduct materials testing of both the interface of the weld and the mechanical properties of the final joint; to model the process with respect to the electromagnetics, thermomechanical effects (which will allow for phase transformation), and wave formation at the interface of the weld; and to optimize the process parameters based on the experimental and modeling efforts. If successful, the results of this research will benefit society at large through reduced weight of structures as dissimilar metals will be effectively welded and thus lower weight components will be located in non-strength critical areas. In addition, this research will add significantly to the modeling and materials characterization during high rate deformation and impact conditions, such as electromagnetic forming, ballistic impact, etc. Collaborating with Magneform offers several advantages including the broad dissemination of the results to industry. Graduate students will benefit from the interdisciplinary nature of the research and incorporation of results into several courses. Finally, Research Experience for Teachers participants will be involved in the research and will create modules for high school classrooms based on the Physics and magnetism aspects of the project. This high rate deformation process will capture the attention and imagination of high school students and potentially attract individuals from underrepresented groups to the project.This project is jointly funded by the Materials Processing & Manufacturing (MPM) Program, of the Civil, Mechanical, and Manufacturing Innovation (CMMI) Division,the Thermal Transport Processes (TTP) Program, of the Chemical, Bioengineering, Environmental, and Transport Systems (CBET) Division and, the Grant Opportunity for Academic Liaison with Industry (GOALI) Program, of the Industrical Innovation and Partnerships (IIP)Divison, all within the Directorate for Engineering (ENG).