About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Circular Metallurgy: Design, Technology, Application
|
| Presentation Title |
First Investigation of Recycling-Induced Changes in Yield Point Elongation Behavior of Near-Interstitial-Free Steels |
| Author(s) |
Lloyd Dodsworth, Marc G.D. Geers, Ron H.J. Peerlings, Johan P.M. Hoefnagels |
| On-Site Speaker (Planned) |
Lloyd Dodsworth |
| Abstract Scope |
Near-Interstitial-Free (near-IF) steels, valued for high ductility, are widely used in forming-intensive applications like automotive body panels. However, like all steels, they are environmentally taxing. Recycling offers a solution, however it was observed that scrap-induced impurities affect not only strength and ductility, but also this critical formability, bottlenecking circularity. This study investigates how the five main scrap impurities and their combination influence the yield point elongation (YPE) in near-IF steel, an aspect not previously examined in recycling context. YPE, an instability after yielding that causes Lüders bands, reduces surface quality during forming. Digital image correlation (DIC) tensile testing was used to quantify changes in yield behavior, ranging from complete suppression to extreme increases in YPE with slight scrap composition changes. These findings were further examined with optical and electron microscopy analysis. The findings offer insights into how recycling effects, previously unreported, Lüders band formation, enabling more informed compensation strategies. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Recycling and Secondary Recovery, Characterization |