EFFECT OF PLANAR ANISOTROPY ON THE PROPERTIES OF WORKPIECES FROM TAILOR WELDED BLANKS OF DUAL-PHASE STEEL

摘要

The combination of different mechanical properties of tailor welded blanks (TWB-s) results in non-constant plastic flow and instability of the weld interface during forming. This is most marked when combining metal sheets of different thicknesses or sheets with significantly different plastic characteristics. This non-uniformity was also observed for tailor welded blanks which consisted of equally thick sheets of one material but had different texture orientations after rolling. When examining the formability of such welded blanks, simulations were performed and verified by real experiments of deep drawing of a rectangular box. Since the influence of the differently oriented texture was not very significant, it was necessary to assess the influence of the ductile characteristics of the weld metal on the overall formability. Since the influence of the differently oriented texture was not very significant, it was necessary to assess the influence of the stress-strain characteristics of the weld metal on the overall formability.