Session Details
Session 3: Advances in Research
Abstract Number:
48
This study will help audience to understand the role of each layer of the bolt coating (i.e., electroplating, passivate and topcoat) on the torque tension relationship of a bolted joint. It will also include SEM studies on bolt coatings.
Topics:
Advances in Research
Electroplated bolts have been widely used in the automotive industry for decades. The torque-tension relationship plays an important role in the behavior and reliability of a bolted joint. In the present work, the effects of each layer of the bolt coating (i.e., electroplating, passivate and topcoat) on the torque tension relationship of a bolted joint are systematically and experimentally investigated. The K factor is measured by a torque-tension testing system and compared under different experimental conditions. The surface microstructures of the bolt coating are also studied by scanning electron microscopy (SEM) to better understand the mechanisms involved in this work.