|About this Abstract
||MS&T23: Materials Science & Technology
||Interface-mediated Phenomena in Structural Materials
||Role of Heterogeneity on Formability in Al1050/Steel/Al1050 Laminated Sheets
||Rae Eon Kim, Yeon Taek Choi, Hyoung Seop Kim
|On-Site Speaker (Planned)
||Rae Eon Kim
Configurational design to heterostructure has received great attention as a means to achieve a superior strength-ductility combination. Heterostructuring to improve tensile properties has been widely investigated whereas the studies on the effect of heterostructuring on sheet formability are still limited. To broaden the applicability of heterogeneous materials in the industry, it is necessary to investigate the characteristics of the heterogeneity in the laminated structure on the formability. This study investigated the stretchability of Al1050/Steel/Al1050 clad sheets based on the attributes of heterostructure: (1) coupling synergy owing to backstress and (2) damage evolution due to internal stress concentration. The laminated sheet showed better mechanical properties than those predicted to rule-of-mixture. In forming test, the enhanced strain-hardening exponent owing to backstress suppresses unstable deformation, and delamination due to excessive strain partitioning blocks to full cracking. This study contributes to expanding industrial applicability for heterostructure by linking the characteristics of heterostructure and formability.