CLOSURE NOTICE: Our office will be closed from October 14 - 19, 2018 in support of our annual ICALEO Conference. Placed orders will be fulfilled on Friday, October 19. If you need assistance, please contact us here as staff will be checking these communications regularly.

Thank you for your understanding.

help desk software

Product Code: JLA_26_1_012002


Authors:
Zhiqing Xue
Shengsun Hu
Junqi Shen
Di Zuo
School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China

Elijah Kannatey-Asibu
Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2125


The microstructure in the intermediate layer of a laser-welded Cu–Al lap joint was examined metallographically. Tensile shear test was performed, and fracture surface analysis was also performed using scanning electron microscopy with energy dispersive spectroscopy. Results showed that there were several different zones with diverse characteristics of morphology and composition in the intermediate layer of the weld joint. Banded and cellular structures were observed in the hypereutectic zone; a lamellar structure was found in the eutectic zone which was the narrowest zone with the finest microstructure; a dendritic structure was obtained in the hypoeutectic zone with the coarsest microstructure and widest zone. The joint faulted in the dendritic hypoeutectic zone, under a combination of brittle and shear mode in the fracture surface. The maximum shear load of the Cu–Al joint decreased with increasing primary dendrite arm spacing and the growth of secondary dendrite in the hypoeutectic zone, which was induced by increasing laser power.

Product Thumbnail

$25.00

Members: $25.00

Note: When applicable, multiple quantity discounts are applied once the items are added to your cart.