|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||J-126: Significance of Grain Refinement in HfNbTiZr and CoCrFeNi High-entropy Alloys
||Wenrui Zhao, Jae-Kyung Han, Megumi Kawasaki
|On-Site Speaker (Planned)
Recent studies show that high entropy alloys (HEAs)perform excellent microstructural stability and mechanical properties under a wide range of temperature. With applying a well-recognized grain refining technique of high-pressure torsion (HPT), HEAs enable to demonstrate further improvements in mechanical properties. The present study applies HPT on two different HEAs of HfNbTiZr and CoCrFeNi for up to 10 turns under 6.0 GPa, and evaluates the differences between the HEAs in the following three aspects. First, the difference in Vickers microhardness evolution is evaluated with increasing numbers of HPT turns. Second, strength and ductility are examined after HPT by applying micro tensile testing. Third, the texture evolution through HPT is examined by X-ray diffraction analysis. This presentation places a special emphasis on the significance of grain refinement by HPT on the two HEAs in terms of both physical and mechanical properties.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume