Effects of Surface Treatment (Lubricant) on Spot Friction Welded Joints Made of 6111-T4 Aluminum Sheets

2007-01-1706

04/16/2007

Event
SAE World Congress & Exhibition
Authors Abstract
Content
The effects of lubricant on lap shear strength of Spot Friction Welded (SFW) joints made of 6111-T4 alloys were studied. Taguchi L8 design of experiment methodology was used to determine the lubricant effects. The results showed that the lap shear strength increased by 9.9% when the lubricant was present at the top surface compared to that of the baseline (no lubricant) whereas the lap shear strength reduced by 10.2% and 10.9% when the lubricant was present in the middle and at the bottom surfaces compared to that of the baseline (no lubricant), respectively. The microstructure analysis showed a zigzag interface at the joint between the upper and the lower sheet metal for the baseline specimen, the specimens with the lubricant at the top and at the bottom. However, a straight line interface is exhibited at the joint between the upper and the lower sheet for the specimen with the lubricant in the middle. The weld nugget sizes of the lap shear tested specimens were measured. The nugget size was largest (7.99 mm) for the specimen with lubricant at the top, followed by the base specimens (7.55 mm). The nugget sizes for the specimen with the lubricant at the bottom and with the lubricant in the middle were the smallest (7.31 mm and 7.25 mm respectively).
Meta TagsDetails
DOI
https://doi.org/10.4271/2007-01-1706
Pages
9
Citation
Arul, S., Pan, T., Schwartz, W., Shih, A. et al., "Effects of Surface Treatment (Lubricant) on Spot Friction Welded Joints Made of 6111-T4 Aluminum Sheets," SAE Technical Paper 2007-01-1706, 2007, https://doi.org/10.4271/2007-01-1706.
Additional Details
Publisher
Published
Apr 16, 2007
Product Code
2007-01-1706
Content Type
Technical Paper
Language
English