Fracture Strengths of Mg Alloy AZ31B-H24 Friction Stir Lap Welds

Zhanwen Chen; Shamzin Yazdanian; Guy Littlefair

doi:10.4028/www.scientific.net/AMR.275.73

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 275Fracture Strengths of Mg Alloy AZ31B-H24 Friction...

Fracture Strengths of Mg Alloy AZ31B-H24 Friction Stir Lap Welds

Abstract:

The effects of selected friction stir lap welding parameters on fracture strength of Mg alloy AZ31B-H24 welds have been studied. Rotation speed has been found to affect significantly the flow related hook size formation. Furthermore, fracture strength decreased almost linearly with hook size. A small amount of softening was detected in fracture location that was outside the nugget zone and thus this softening may only adversely affect the fracture strength slightly. Finally, simulation results are presented to show the uneven stress distribution in a lap geometry which together with the relative brittleness of the stir material must be the cause to have significantly reduced the fracture strength.

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Periodical:

Advanced Materials Research (Volume 275)

Pages:

73-76

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.275.73

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Online since:

July 2011

Authors:

Zhanwen Chen, Shamzin Yazdanian, Guy Littlefair

Keywords:

FS Softening, Hooking, Material Flow, Stress Distribution

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