|About this Abstract
|2022 TMS Annual Meeting & Exhibition
|Ultrafine-grained and Heterostructured Materials (UFGH XII)
|Microstructure Evolution in Additively Manufactured and High-pressure Torsion Processed High-entropy Alloys during Heating as Characterized by Neutron Diffraction
|Xiaojing Liu, Jae-Kyung Han, Yusuke Onuki, Yulia O Kuzminova, Stanislav A Evlashin, Megumi Kawasaki, Klaus-Dieter Liss
|On-Site Speaker (Planned)
The microstructure evolution during heating of a 3d-printed and high-pressure torsion processed high entropy alloy CoCrFeNi is investigated using in-situ neutron diffraction. For comparison, the same experiment is performed on the as-printed high entropy alloy. Because of strain anisotropy in as-printed material, the modified Wiiliamson-Hall method is calculated from the conventional Willamson-Hall plot by applying a dislocation model. The evolution of dislocation density during heating can be detected. Different behavior upon heating of as-printed, as-cast and HPT processed high entropy alloys can be revealed by peak width analysis to distinguish recovery, recrystallization and grain growth. Finally, the texture also plays a role during above mentioned processes.
|High-Entropy Alloys, Characterization, Additive Manufacturing