GRAIN REFINEMENT OF METALLIC COMPONENTS BY CONTROLLED STRAIN PATH CHANGE
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Issued Date -
May 19, 2011
app pub date -
May 27, 2009
filing date -
May 28, 2008
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Abandoned
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Abstract
Nowadays, the production of metallic parts, namely sheet metal, with high strength and formability, represents a big challenge for automotive, aerospace and assembling industries. The present invention deals with a new plastic deformation process that allows, by controlling the strain path change, the production of sheet metals with a grain size of 1-2 micron and, consequently, with a yield stress 3-4 times than the ones obtained with conventional processes, keeping the same formability. The process is easy for industrialization and its optimization requires only two fundamental parameters that characterize the ratio of thickness reduction, shear strain and amplitude in the change of strain path.
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