Microstructural investigation of the assessed high strength Al6082 self-piercing riveted joints

EasyChair Preprint 975

Abstract

Self-piercing riveting (SPR) as a solid-state joining technology has extended its application in the automobile industry in recent years, mostly in the joining of car body aluminium sheets. Several investigations have been carried out to study the effect of rivet, die and process parameters including material stacks on the joint quality either by physical experiment or computer simulation. The characteristic features of microstructures around the joint, optimize process parameters and improve joint quality, are not considered in these investigations. In the present work, a method to determine the SPR conditions that produce a joint of the best quality, based on an analytic hierarchy process (AHP) is proposed. Then, using the method, best condition to join two layers of 2.5mm thick AA6082 aluminium sheets in T6 condition by SPR were determined. Finally, the microstructures of the best joint is examined by optical microscopy. It was confirmed that the area around the outer wall of the tail of the rivet in the lower sheet exhibited the highest deformation and possibly tolerated the highest tensile stress.

Keyphrases: Analytic Hierarchy Process (AHP), Microstructure, Self Piercing Riveting (SPR), Solid state joining, mechanical joints

@booklet{EasyChair:975,
  author    = {Ebad Bagherpour and Yan Huang and Zhongyun Fan},
  title     = {Microstructural investigation of the assessed high strength Al6082 self-piercing riveted joints},
  howpublished = {EasyChair Preprint 975},
  year      = {EasyChair, 2019}}