Surface Functionalization by Magnetic Field Assisted Finishing

该奖项的研究目标是生产具有纳米至微米范围特性的表面，以实现复杂形状部件的所需功能。表面生成将使用磁场局部操纵磨料来实现，这会导致材料去除和表面变形。这种磁场辅助精加工（MAF）工艺将专门应用于奥氏体不锈钢，因为它们与自由形式的生物医学应用（包括膝关节植入物）直接相关。研究议程分为两个主要任务。任务1涉及材料去除和磁粉运动模型的开发。当考虑颗粒动力学时，诸如磨料颗粒在磁场中的运动以及颗粒与表面之间的犁/切削力的影响将被并入离散元件模拟中。任务2包括模型的实验验证和表面加工机制和自由曲面的摩擦学性能之间的关系的研究。这些工作的结果将联合收割机结合起来，证明MAF用于表面功能化的可行性，如果成功的话，本研究的结果将为复杂形状部件上的功能化表面提供一种新的制造技术。表面功能化对于提高生物医学技术的性能和改善关节疾病患者的生活质量具有巨大的潜力。这些功能化表面的生产将促进对磁性磨料行为、材料去除、最终表面光洁度和摩擦学性能以及它们之间的相互关系的理解。多学科研究计划将为研究生和本科生提供一个激励性的学习环境。此外，还将实施一项新的女大学生辅导方案，以发展关系，从而改善支助网络。该计划将更好地吸引女本科生参与大学工程经验，并提高她们在工程职业中的长期保留。

The research objective of this award is to produce surfaces with characteristics in the nanometer to micrometer range that enable desired functionality for complex-shaped components. Surface generation will be realized using a magnetic field to locally manipulate abrasives, which cause material removal and surface deformation. This magnetic field assisted finishing (MAF) process will be specifically applied to austenitic stainless steels due to their immediate relevance to free-form biomedical applications, including knee implants. The research agenda is divided into two primary tasks. Task 1 involves the development of models for material removal and magnetic particle motion. When considering the particle dynamics, effects such as the motion of the abrasive particles in the magnetic field and the plowing/cutting forces between the particles and surface will be incorporated into a discrete element simulation. Task 2 includes the experimental validation of the model and a study of the relationship between surface fabrication mechanisms and the resulting tribological properties of free-form surfaces. The outcomes of these tasks will combine to demonstrate the feasibility of MAF for surface functionalization.If successful, the results of this research will provide a new fabrication technique for functionalized surfaces on complex-shaped components. Surface functionalization has great potential for enhancing the performance of biomedical technology and improving the quality of life for sufferers of joint disease. The production of these functionalized surfaces will advance understanding of the magnetic abrasive behavior, material removal, final surface finish, and tribological performance, as well as their interrelationships. The multi-disciplinary research plan will provide a stimulating learning environment for both graduate and undergraduate-level students. In addition, a new mentoring program for women undergraduates will be implemented to develop relationships that lead to an improved support network. This program will better engage women undergraduates in the university engineering experience and enhance their long-term retention in engineering careers.