Abdelghany, A. W., Jaskari, M., Hamada, A. S., Järvenpää, A., El-Hofy, H. A., Chiba, A., & Gepreel, M. A.-H. (2022). Hot deformation behavior and constitutive modeling of a cost-effective Al8Cr12Mn25Ni20Fe35 high-entropy alloy. Journal of Alloys and Compounds, 928, 167028. https://doi.org/10.1016/j.jallcom.2022.167028
Hot deformation behavior and constitutive modeling of a cost-effective Al8Cr12Mn25Ni20Fe35 high-entropy alloy
|Author:||Abdelghany, Ahmed W.1,2; Jaskari, Matias3; Hamada, Atef S.3;|
1Materials Science and Engineering Department, School of Innovative Design Engineering, Egypt-Japan University of Science and Technology, Alexandria 21934, Egypt
2Design and Production Engineering Department, Faculty of Engineering, Ain Shams University, Cairo Governorate 11535, Egypt
3FMT-group, Kerttu Saalasti Institute, University of Oulu, Pajatie 5, FI-85500 Nivala, Finland
4Industrial and Manufacturing Engineering Department, School of Innovative Design Engineering, Egypt–Japan University of Science and Technology, Alexandria 21934, Egypt
5Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
|Online Access:||PDF Full Text (PDF, 22.1 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2022123074116
|Publish Date:|| 2022-12-30
In this study, a new non-equiatomic and cost-effective high-entropy alloy (HEA), Al8Cr12Mn25Fe35Ni20, was designed using thermodynamic parameters and prepared by arc melting. The alloy was subjected to homogenization at 1200 °C and a hot-rolling reduction of 50%. The hot deformation behavior and deformation mechanism were studied at varying strain rates ranging from 0.01 to 10 s−1 and temperatures ranging from 900° to 1100°C via plane strain compression tests using a Gleeble 3800 thermo-mechanical simulator. The phase structure of the rolled alloy was studied using electron backscattered diffraction (EBSD), X-ray diffraction, and differential thermal analysis to detect phase transformation. The constitutive model was implemented to predict the high-temperature flow stress using the Zener-Holloman parameter (Z), which correlated well with the experimental values. The studied HEA exhibited a relatively high activation energy for hot deformation of 389.5 kJ.mol−1, i.e., comparable to those of equiatomic HEAs in the literature. The hot-deformed microstructural features and deformation mechanism were studied using EBSD, which revealed discontinuous dynamic recrystallization as the main softening mechanism. Dynamic recrystallization (DRX) showed the formation of fine grains along the initial grain boundaries, accompanied by Al-Ni-rich B2 precipitates at the recrystallized grain boundaries.
Journal of alloys and compounds
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
216 Materials engineering
Future Manufacturing Technologies (FMT) research group, Kerttu Saalasti Institute, University of Oulu is acknowledged for funding the experimental work of this study. This work was partially supported by the Grants-in-Aid for Scientific Research (KAKENHI, grant number: 18H05455) from the Japan Society for the Promotion of Science, and the Central Department of Missions (CDM) under the Cultural Affairs and Missions Sector at the Ministry of Higher Education of Egypt (MoHE).
© 2022 The Authors. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).