| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Advancements in Steel Structural Refinement
|
| Presentation Title |
The Capability of Severe Plastic Deformation to Achieve High Strength and Toughness in Two High Strength Steel Alloys, Austenitic FeMnAl and Martensitic AF9628 |
| Author(s) |
Matthew W. Vaughan, Sezer Picak, Cafer Acemi, Richard Harris, Peyman Samimi, Sean Gibbons, Rachel Abrahams, Robert Barber, Ibrahim Karaman |
| On-Site Speaker (Planned) |
Matthew W. Vaughan |
| Abstract Scope |
The effects of equal channel angular pressing (ECAP) to refine the microstructure in high strength steel alloys is explored. The alloys analyzed are FeMnAl, an austenitic steel alloy known for its high strength to weight ratio due to the addition of Al, which reduces weight and increases precipitation hardenability; and AF9628, which is a newly developed high strength low alloy (HSLA) martensitic steel alloy known for exceptional strength and toughness. Given the high strength of these materials, processing via ECAP could only be achieved at high temperatures (>900°C). However, despite high processing temperatures, these materials achieved significant strengthening after ECAP via microstructural refinement. Here, the number of imposed ECAP passes, the selected routes, and the selected temperatures of processing produced a variety of enhancements in mechanical properties for these materials, allowing for a fairly thorough exploration of the limits of the mechanical property space for FeMnAl and AF9628 steel alloys. |