| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced High Strength Steels IV
|
| Presentation Title |
Low-Density Steels: Microstructure Evolution and Tensile Behavior in Novel FE-MN-AL-C Steels |
| Author(s) |
Tomas Scuseria, Kelcey Garza, Dean Pierce, Amrinder Gill, Erik Pavlina, Jerry Arnold, Amy Clarke, Kester Clarke, Omar Garcia, Fred Fletcher |
| On-Site Speaker (Planned) |
Tomas Scuseria |
| Abstract Scope |
Low-density steels with high specific strength are an ideal path to energy savings and improved performance in advanced high strength steels for the transportation sector. Aluminum additions (3-12 wt%) to medium-Mn, low-C sheet steels provide direct mass savings, in addition to control over duplex ferrite-austenite microstructures and intermetallic precipitation such as κ-carbides. These Fe-Mn-Al-C steels have shown excellent strength-ductility combinations with density reductions beyond 10% compared to conventional Advanced High Strength Steels (AHSS). Experimental Fe-Mn-Al-C grades, including alloy additions such as Ni, Cu, Cr, and Si, were hot rolled into sheets and investigated. The effects of alloying content and various heat treatments on microstructure evolution and work hardening behavior, including Transformation Induced Plasticity and Twinning Induced Plasticity (TRIP/TWIP) effects were studied. Dilatometry and x-ray diffraction provided insight into critical temperatures and the stability of austenite and carbide phases. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |