Study on Mechanical Properties of Hybrid Aluminum Alloy Formed by Rolling and Wire Arc Additive Manufacturing

This paper designed several routes of heat treatment and wire arc additive manufacturing (WAAM) based on a rolled aluminum alloy plate 2219 to study the effect of heat treatment on mechanical properties of hybrid materials which are formed by WAAM on the AA2219 base. The test results show that the average tensile strength of the aged hybrid materials based on an annealed aluminum alloy is significantly increased, but its average elongation is obviously reduced, compared to the specimens obtained by other heat treatment routes; and that the fracture locations of the hybrid materials are mostly in the WAAM region, which indicates that the strength of the WAAM region is smaller than that of the substrate region.