Physical Simulation of Longitudinal Weld Seam Formation During Extrusion to Produce Hollow Aluminum Profiles

摘要

Uniaxial compression tests were performed to understand the solid-state bonding process that occurs in porthole dies during the manufacturing of hollow aluminum extrusions. Strain, strain rate, and temperature applied during the tests were those typically encountered during aluminum extrusion. For a good bond, strain was found to be the most influential parameter, along with bonding time. The effect of temperature on bonding depended on alloy composition. Bonding stress was less influential within the range investigated. Surface stretching was introduced to the AA6060, AA6082, and AA7020 aluminum alloys as a criterion to quantify the bonding phenomena and distinguish their bondabilities.