A ductile high entropy alloy strengthened by nano sigma phase
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 106813 |
Journal / Publication | Intermetallics |
Volume | 122 |
Online published | 29 Apr 2020 |
Publication status | Published - Jul 2020 |
Link(s)
Abstract
A nanoscale sigma (σ) phase strengthened Co34.5Cr30Ni26.5Al5.4W3.6 (at, %) high entropy alloy was prepared and showed high strength and ductility. Dual phase microstructure that comprises face-centered cubic (FCC) matrix and nanoscale σ particles was obtained after thermomechanical procedures. The excellent ductility is attributed to its high strain hardening exponent FCC matrix that strongly favors uniform deformation and prevents crack propagation. The alloy shows an extremely high strain hardening rate and strength due to the interactions between the σ particles, deformation twins and dislocations. The design concept of “deformation twins + nano particles” should be considered for the design of additional double-high (strength and ductility) FCC HEAs in future work.
Research Area(s)
- Ductility, High entropy alloy, Intermetallic phase, Precipitation hardening, Strength, Work hardening
Citation Format(s)
A ductile high entropy alloy strengthened by nano sigma phase. / Zhang, Lu; Huo, Xiaofeng; Wang, Anguo; Du, Xinghao; Zhang, Li; Li, Wanpeng; Zou, Naifu; Wan, Gang; Duan, Guosheng; Wu, Baolin.
In: Intermetallics, Vol. 122, 106813, 07.2020.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review