Al-steel weld joint
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United States of America Patent
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Jun 9, 2020
Grant Date -
Oct 12, 2017
app pub date -
Apr 4, 2017
filing date -
Apr 8, 2016
priority date (Note) -
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Abstract
A weld joint is disclosed that weld bonds together an aluminum workpiece and a steel workpiece. The weld joint includes an aluminum weld nugget, an intermetallic layer, and an annular ring of aluminide particles that is selected from the group consisting of nickel aluminide particles, iron aluminide particles, and a combination thereof. The annular ring of aluminide particles extends upwards from a weld bond surface of the weld joint such that the annular ring of aluminide particles extends radially inwardly into the aluminum weld nugget and protects the weld bond surface of the weld joint against crack propagation that may originate from a notch root of the weld joint.
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