Fundamental Aspects of Rolled Zn Alloy Sheet Formability: Structure-Property and Failure Mode Relationships, Materials Science Forum, Vol. 879 (2017), pp. 1443-1448
G. Pantazopoulos, A. Toulfatzis, A. Vazdirvanidis, A. Rikos
In the present work, critical testing methods are employed in order to assess the formability
of a Zn-Ti-Cu alloy, evaluating, therefore, the anisotropic properties of the produced sheet.
The determination of plastic strain ratios and the induced combined mathematical
expressions, utilizing bi-axial strain measurements for the various test directions (0, 45 and
90 degrees towards the RD), together with the performance of cupping tests are compiled,
aiming to rank and interpret the bending and sheet metal roll-forming capability. Moreover,
the microstructural characterization is realized to address the influence of grain and phase
structure on the sheet metal formability and identify potential optimization routes. Fracture
analysis approach elucidated the micro-mechanisms prevailed in damage evolution and
accumulation during monotonic loading, signifying the importance of microstructure
development during thermomechanical process history.