| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Structural Evolution during Nanostructuring and Heating of an Additive-Manufactured CoCrFeNi Alloys Examined by X-ray and In-situ Neutron Diffraction Analyses |
| Author(s) |
Megumi Kawasaki, Jae-Kyung Han, Xiaojing Liu, Klaus-Dieter Liss |
| On-Site Speaker (Planned) |
Megumi Kawasaki |
| Abstract Scope |
Structural evolution through nanostrcuturing and relaxation upon heating are examined by X-ray diffraction and in-situ heating neutron diffraction analyses, respectively, on additive-manufactured (AM) 316L stainless steel and equiatomic CoCrFeNi high-entropy alloy (HEA). Significant structural changes occur in a very early stage of nanostructuring through the application of high-pressure torsion leading to severe lattice distortion by the excess of dislocations and defects. The sequential information on the structure relaxation during in-situ heating neutron diffraction analysis provides the texture development, linear thermal lattice expansion, and stress relaxation behaviors of the nanocrystalline steel and HEA with increasing temperature up to 1300K. Together with the hardness measurements after heating, the results of structural evolution are interpreted to describe microstructural recovery, recrystallization and grain growth behaviors and the thermal stability of the AM nanocrystalline CoCrFeNi alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Characterization, Mechanical Properties |