Abstract
Although sheet formability depends significantly on the properties of the base metal, surface coatings used for corrosion protection can affect the friction at the tool/sheet interface and, therefore, influence the amount of deformation. In an effort to better understand the effects of surface coatings on formability, limiting dome height testing was done on samples of drawing- quality aluminum- killed sheet steel with laboratory- produced electrodeposited zinc coatings of different characteristics. The results showed that the formability of zinc- coated products was reduced compared to the uncoated steel in all strain states. It was also shown that zinc coating crystallographic texture strongly influences sheet forming behavior and may be as important a parameter as surface roughness in friction characterization.
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