Enhanced diffusion and phase transformations during ultrasonic welding of zinc and aluminum
Elevated-temperature (513 K) ultrasonic welding of aluminum with zinc was investigated. The interface exhibits structures indicative of enhanced interdiffusion and local melting of Al-Zn solid solution. EDS analysis yielded an interdiffusivity value of 1.9 μm2/s. The enhanced diffusion and melting can be attributed to high strain rate (∼103 s -1) plastic deformation in aluminum, which may increase the instantaneous vacancy concentration as high as ∼10-1. © 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Gunduz, I., Ando, T., Shattuck, E., Wong, P., & Doumanidis, C. (2005). Enhanced diffusion and phase transformations during ultrasonic welding of zinc and aluminum. Scripta Materialia, 52 (9), 939-943. https://doi.org/10.1016/j.scriptamat.2004.12.015