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.‎