The work indicated that nugget porosity, up to about 40% of the weld diameter, deep surface indentation and variation in weld size had no major impact on the fatigue properties of the welds. Static shear and fatigue tests were conducted on welds over a range of welding conditions to simulate severe weld discontinuities. Trials were conducted on 1.2mm thick 5182-0 aluminium alloy, in the mill finished condition. The objectives of this work were to provide information about the effect of excessive porosity and surface indentation, and the effect of weld size on the fatigue performance of spot welds in aluminium alloy sheet. It is important that the particular discontinuities, which are often found in aluminium alloy spot welds, do not adversely affect the weld properties. There is a strong interest in the use of aluminium alloy sheet for vehicle applications, particularly the body where resistance spot welding is the principal joining method. Publishers - American Welding Society - )īy A Gean*, S A Westgate**, J C Kucza*, and J C Ehrstrom* (Originally published in Welding Journal, 1999, Vol. National Structural Integrity Research Centre.Structural Integrity Research Foundation.
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