Abstract
Hydrogen accumulation during bending of Al-Mg-Si alloys for automotive body panel was visualized by means of hydrogen microprint technique in comparison with the stress and strain localization simulated by finite element method. Silver particles representing the site of hydrogen emission were arranged at the grain boundaries and slip lines when the specimen was bended at 170° degree. Hydrogen accumulation was increased when the bending pattern was changed from the 170° bending to the full bending. It was also revealed that hydrogen was preferentially accumulated at the tension side of the specimen after the full bending.
