ASSESSMENT OF THE COLD FORMABILITY OF FERRITIC STEELS USING PARAMETERS DETERMINED IN UNIAXIAL TENSILE TESTING

Possibilities and limits of the uniaxial tensile testing in the assess ment of cold formability of ferritic low alloy steels are evaluated in the paper. Cold formability covering both sheet and massive forming, including entire formability maps, strain hardening etc., can be estim ated from six material parameters determined in a uniaxial tensile tes t. A master stress strain curve to explain multiple n behavior is prop osed. Effects of alloying, especially chromium, and other metallurgica l parameters on cold formability are discussed.