Effect of Tool Speeds during Friction Stir Lap Welding on Mode of Fracture and Fracture Strength of Al 6060-T5 Joints

Shamzin Yazdanian; Zhanwen Chen; Guy Littlefair

doi:10.4028/www.scientific.net/AMR.275.77

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 275Effect of Tool Speeds during Friction Stir Lap...

Effect of Tool Speeds during Friction Stir Lap Welding on Mode of Fracture and Fracture Strength of Al 6060-T5 Joints

Abstract:

Friction stir lap welding (FSLW) of an age hardened Al alloy and evaluations of how FS speeds affected hooking and how hooking and softening due to FS affected fracture strength of the lap welds have been conducted. It was found that increasing rotation speed () and reducing welding speed (v) increased the stir zone size (AB-SZ) and also hook size (h), although a maximum value of h (hMax) reached. The features of hooks for the observed (,v)- AB-SZ-h relationships are presented and explained. It was found that when h increased to a value of ~ 0.9 mm (for the 3 mm alloy sheets), it started to invoke a significant effect on reducing fracture strength. Factors such as FS softening and insufficient joining, limited the fracture strength of the lap welds for small h values and these are presented and discussed.

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Periodical:

Advanced Materials Research (Volume 275)

Pages:

77-80

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.275.77

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Online since:

July 2011

Authors:

Shamzin Yazdanian, Zhanwen Chen, Guy Littlefair

Keywords:

FS Softening, Hooking, Material Flow, Stir Zone

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