Surface Functionalization by Magnetic Field Assisted Finishing

该奖项的研究目标是生产具有纳米到微米范围特性的表面，使复杂形状部件具有所需的功能。表面生成将通过磁场局部操纵磨料来实现，这将导致材料去除和表面变形。这种磁场辅助精加工（MAF）工艺将特别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涉及材料去除和磁粒子运动模型的开发。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耕/切削力等影响将被纳入离散元模拟中。任务2包括模型的实验验证和表面加工机制与自由曲面摩擦学特性之间关系的研究。这些任务的结果将结合起来证明MAF表面功能化的可行性。如果成功，本研究结果将为复杂形状部件的功能化表面的制造提供一种新的技术。表面功能化在提高生物医学技术性能和改善关节疾病患者的生活质量方面具有巨大的潜力。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相互关系的理解。该多学科研究计划将为研究生和本科生提供一个刺激的学习环境。此外，将实施一项针对女大学生的新辅导计划，以发展关系，从而改善支持网络。该项目将更好地吸引女性本科生参与大学工程经验，并提高她们在工程职业生涯中的长期留存率。

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.