Journal
INTERMETALLICS
Volume 149, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2022.107657
Keywords
High -entropy alloy; Annealing; Microstructure; Precipitation; Deformation and fracture
Categories
Funding
- National Natural Science Foundation of China [52001236, 51971099]
- Natural Science Foundation of Hubei Province [2020CFB 113]
- open fund of State Key Laboratory of Materials Processing and Die & Mold Technology [P2022-010]
Ask authors/readers for more resources
This study investigated the microstructures and mechanical properties of an annealed dual-phase high-entropy alloy. The results showed that rod-like B2 phase precipitated from the FCC-solution matrix with increased annealing temperature. The higher annealing temperature resulted in a significant decrease in yield strength, but an increase in fracture strain and work-hardening capacity. The activation volume of the annealed HEA exhibited an abnormal trend due to the formation of co-clusters.
The present work investigated microstructures and mechanical properties of an annealed dual-phase high -entropy alloy (HEA) CrFeCoNiAl0.7 between 700 and 1100 degrees C. It revealed that with the increased annealing temperature, there were rod-like B2 phase precipitating from the FCC-solution matrix, and the orientation between the precipitated B2 phase and the FCC matrix obeyed Kurdjumov-Sachs (K-S) relationship {111}(FCC)// {011}(B2) and <011 >(FCC)//<111 >(B2). The higher annealing temperature resulted in a drastic drop in yield strength, but a significant increase in fracture strain and work-hardening capacity. The positive value of the strain rate sensitivity (SRS) decreased with strain and the SRS of the HEA sample annealed at a lower temperature decreased greatly. Due to the formation of co-clusters, the activation volume of the annealed HEA presented an abnormal trend, that was, it increased with strain.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available