|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||Microstructure and mechanical properties of an equiatomic CoCrFeMnNi high entropy alloys fabricated by gas atomization.
||Cheenepalli Nagarjuna, Kwang Yong Jeong, Hyeon Jeong You, Gian Song, Jin Kyu Lee, Soon Jik Hong
|On-Site Speaker (Planned)
In this study, an equiatomic CoCrFeMnNi high entropy alloys (HEAs) fabricated by using a combination of gas atomization, mechanical milling and spark plasma sintering processes. The phase identification and morphological studied of alloy powders have been investigated by the X-ray diffraction and SEM analysis respectively. The grain refinement mechanism and chemical composition behavior was examined with mechanical milling time. Moreover, we investigated the mechanical properties such as Vickers hardness and compressive strength of HEAs under different milling times. In order to understand the failure mechanism during compression test, we studied the cross-sectional microstructure of the compressive samples for analyzing the kind of fracture occurred with grain sizes. The results revealed that a significant improvement of hardness and compressive strengths for the fine-grained microstructure than coarse grained microstructure. It is mainly attributed to the gain boundary strengthening behavior and the obtained results followed the Hall-Petch relationship.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume