Patent ID: 6564646
Filing Date: 2003-05-20
Classification: G01N

Abstract:
A process for determining biaxial shaping behavior of metallic material comprising the steps of:(a) producing an area of practically homogeneous deformation in a primary sample by tensile stressing along an axis; (b) taking a plurality of secondary samples from the area of practically homogeneous deformation in the primary samples, the plurality of secondary samples having different orientations with respect to the axis of tensile stressing; (c) determining tensile and compressive flow limits in the plurality of secondary samples under uniaxial tensile and compressive loading; (d) determining in at least one of the secondary samples a plastic longitudinal expansion and a plastic transverse expansion at the tensile or compressive flow limit; (e) determining a relationship between the plastic longitudinal and plastic transverse expansion in the at least one secondary sample; and (f) determining characteristic parameters of an approximately elliptical flow locus curve from the tensile and compressive flow limits determined in step (c), and from the relationship between the plastic longitudinal and transverse expansion at the tensile or compressive flow limit determined in step (e).