| About this Abstract |
| Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Presentation Title |
Formability and Damage-resistance of Laminated Steel Sheets with Non-ideal Interface Bonding |
| Author(s) |
Onur Güvenç, Menglei Jiang, Cemal Cem Taşan |
| On-Site Speaker (Planned) |
Onur Güvenç |
| Abstract Scope |
Roll-bonding typically aims at step-change increases in performance compared to monolithic alloys by achieving excellent bonding condition. Instead, in this work, we turn our attention to laminated steel sheets with imperfect bonding due to presence of oxides or voids whose response to varying strain and stress states during forming and in-service conditions is not well established. We manufactured defected single- and bi-alloy multi-layer steel stacks by hot roll-bonding and subsequent heat treatment. Despite the inevitable deficiencies in bond strength, mechanical characterization of laminates using tensile and Nakajima test setups with digital image correlation showed that their formability is sufficient for a wide range of metal forming operations. Further microstructural and mechanical analyses demonstrated that their retained formability is due to the favorable stress states acting on the interface, not promoting delamination. An accompanying benefit to the laminated structure is generation of weak lateral interfaces, hindering crack re-initiation during forming. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |