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| Drawing
is a process used in the formation of wire and other elongated uniform
sections. The material to be drawn is pulled through a die the shape of
which places the material under a multiaxial stress. In addition to a tensile
stress along the drawing direction the material experiences a compressive
stress in the orthogonal directions. This multiaxial stress field prevents
the onset of neck formation.
In the drawing process, the crystal structure of the material is changed and it is work hardened. As shown in the diagram, furnaces following the drawing die are used to promote recrystallization and grain growth to restore the ductility and isotropy of the material properties. |
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| From:
McMahon and Graham,
"Introduction to Engineering Materials," Merion (1992) |
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