| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Progress towards Understanding the Synthesis and Behavior of Metals Far from Equilibrium: A SMD Symposium Honoring Enrique Lavernia on the Occasion of His 60th Birthday
|
| Presentation Title |
Severe Plastic Deformation Enhanced Segregation and Precipitation in Nanostructured Steels |
| Author(s) |
Andrew K. Hoffman, Maalavan Arivu, Haiming Wen |
| On-Site Speaker (Planned) |
Andrew K. Hoffman |
| Abstract Scope |
During severe plastic deformation (SPD) processing, materials are subjected to high strains and often moderate to high temperatures. SPD therefore creates a state far from equilibrium, which can affect the stability of the system significantly. In this study, austenitic 304L and Kanthal-D Fe-Cr-Al stainless steels were both subjected to SPD using high pressure torsion (HPT) and equal channel angular pressing (ECAP). Samples were studied using various electron microscopy techniques as well as atom probe tomography (APT). APT results on the 304L steel showed that after HPT at 300°C Ni, Mn, and Si segregated towards grain boundaries, causing the formation of Ni-Mn-Si precipitates. After both ECAP at 500°C and HPT at 300°C Kanthal-D was found to contain a large number density of Cr enriched M23C6 carbides, which was associated with Cr and C segregation towards and Al depletion at grain boundaries. |
| Proceedings Inclusion? |
Undecided |