Method of forming and blank therefor
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United States of America Patent
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app pub date -
Apr 5, 2004
filing date -
Apr 7, 2003
priority date (Note) -
Abandoned
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Abstract
A method of forming and a blank therefor, in which the blank comprises a parent body and an insert, at least one of which is made of a material which possesses superplastic properties. The insert is joined to the parent body by friction stir welding. The primary purpose of the invention is to provide a blank for a forming process during which some parts of the blank are required to deform to an extent which requires superplastic properties, whereas the remaining parts of the blank are deformed to a lesser extent.
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