TY - JOUR
T1 - Composition-dependent grain growth kinetics of Ni-Co-Cr-Fe high-entropy alloys
AU - Chen, Jun
AU - Liu, Xin
AU - Wu, Yixia
AU - Linghu, Xinrui
AU - Liu, Yifan
AU - Yang, Zhongsheng
AU - Cui, Dingcong
AU - He, Feng
N1 - Publisher Copyright:
© 2024 Author(s).
PY - 2024/11/4
Y1 - 2024/11/4
N2 - Grain size refinement is one of the most effective and feasible approaches to tailor the mechanical properties of metals and alloys. This classic strengthening mechanism is recently highlighted in Ni-Co-Cr-Fe-based high-entropy alloys due to its extremely large Hall-Petch coefficient of 1100 MPa·μm1/2. However, the grain growth kinetics of Ni-Co-Cr-Fe, which serve as the guideline for controlling the grain size of related high-entropy alloys (HEAs), are still unclear. Here, we investigated the grain growth behaviors of Ni2CoCrFe, NiCo2CrFe, and NiCoCrFe2. Our results show that the grain growth kinetics of Ni-Co-Cr-Fe are highly dependent on the concentration of its principal elements. The grain growth activation energies are 315, 622, and 570 KJ/mol for Ni2CoCrFe, NiCo2CrFe, and NiCoCrFe2, respectively. This big difference is mainly attributed to the degree of grain boundary segregation caused by the interactions between different atomic pairs. These findings are helpful for designing HEAs with controllable microstructures.
AB - Grain size refinement is one of the most effective and feasible approaches to tailor the mechanical properties of metals and alloys. This classic strengthening mechanism is recently highlighted in Ni-Co-Cr-Fe-based high-entropy alloys due to its extremely large Hall-Petch coefficient of 1100 MPa·μm1/2. However, the grain growth kinetics of Ni-Co-Cr-Fe, which serve as the guideline for controlling the grain size of related high-entropy alloys (HEAs), are still unclear. Here, we investigated the grain growth behaviors of Ni2CoCrFe, NiCo2CrFe, and NiCoCrFe2. Our results show that the grain growth kinetics of Ni-Co-Cr-Fe are highly dependent on the concentration of its principal elements. The grain growth activation energies are 315, 622, and 570 KJ/mol for Ni2CoCrFe, NiCo2CrFe, and NiCoCrFe2, respectively. This big difference is mainly attributed to the degree of grain boundary segregation caused by the interactions between different atomic pairs. These findings are helpful for designing HEAs with controllable microstructures.
UR - https://www.scopus.com/pages/publications/85208652980
U2 - 10.1063/5.0220500
DO - 10.1063/5.0220500
M3 - 文章
AN - SCOPUS:85208652980
SN - 0003-6951
VL - 125
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 19
M1 - 191702
ER -