Weld nugget inoculation
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United States of America Patent
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Dec 19, 2006
Grant Date -
May 19, 2005
app pub date -
Nov 18, 2003
filing date -
Nov 18, 2003
priority date (Note) -
Expired
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Abstract
A weld nugget between aluminum alloy parts is inoculated with a material in order to refine the grain structure of the weld and thereby improve its mechanical strength. The inoculate may be a Ti or Na based compound in the form of a paste, powder or film, which is applied to the sheets before welding. The inoculation promotes nucleation of desirable equiaxed grain within the molten weld nugget as the weld cools and solidifies.
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