Impact Welding Structural Aluminium Alloys to High Strength Steels Using Vaporizing Foil Actuator
Loading...
Date
2016-04-27
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Dissimilar Al/Fe joining was achieved using vaporizing foil actuator welding. Flyer
velocities up to 727 m/s were reached using 10 kJ input energy. Four Al/Fe combinations
involving AA5052, AA6111-T4, JAC980, and JSC1500 were examined. Weld samples were
mechanically tested in lap-shear in three conditions: as-welded, corrosion-tested with ecoating,
and corrosion-tested without coating. In all three conditions, the majority of the
samples failed in the base aluminium instead of the weld. This shows that the weld was
stronger than at least one of the base materials, both before and after corrosion testing.
Galvanic corrosion was not significant since the differences in open cell potential, which
represent the driving forces for galvanic corrosion, were small among these materials—no
more than 60 mV in all cases. Nonetheless, through corrosion testing, the base materials
suffered general corrosion, which accounted for the weakening of the base materials.
Description
Table of contents
Keywords
vaporizing foil actuator welding, aluminium, ultra-high strength steel