scholarly journals Multistage work hardening assisted by multi-type twinning in ultrafine-grained heterostructural eutectic high-entropy alloys

2020 ◽  
Vol 41 ◽  
pp. 62-71
Author(s):  
Peijian Shi ◽  
Yunbo Zhong ◽  
Yi Li ◽  
Weili Ren ◽  
Tianxiang Zheng ◽  
...  
Keyword(s):  
Work Hardening ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Ultrafine Grained

scholarly journals Enhanced strength–ductility synergy in ultrafine-grained eutectic high-entropy alloys by inheriting microstructural lamellae

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Peijian Shi ◽  
Weili Ren ◽  
Tianxiang Zheng ◽  
Zhongming Ren ◽  
Xueling Hou ◽  
...  
Keyword(s):  
High Entropy Alloys ◽  
High Entropy ◽  
Ultrafine Grained

Deformation behavior of nanocrystalline and ultrafine-grained CoCrCuFeNi high-entropy alloys

2019 ◽  
Vol 34 (5) ◽  
pp. 720-731 ◽  
Author(s):  
Seungjin Nam ◽  
Jun Yeon Hwang ◽  
Jonggyu Jeon ◽  
Jihye Park ◽  
Donghyun Bae ◽  
...  
Keyword(s):  
Deformation Behavior ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Ultrafine Grained ◽  
Image Position

Abstract

Effect of Chemical Composition on Grain Refinement of AlxCoCrFeNi High Entropy Alloys with NiAl Grain Boundary Precipitates

2021 ◽  
Vol 1016 ◽  
pp. 1690-1695
Author(s):  
Hiroyuki Y. Yasuda ◽  
Hiroyuki Miyamoto ◽  
Takuya Inagaki ◽  
Ken Cho ◽  
Takeshi Nagase
Keyword(s):  
Grain Refinement ◽  
Volume Fraction ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Nial Phase ◽  
Ultrafine Grained ◽  
Average Grain Size ◽  
Ultrafine Grained Microstructure ◽  
B2 Structure ◽  
Smith Model

In AlxCoCrFeNi high entropy alloys (x = 0.3–0.5), the NiAl phase with the B2 structure is precipitated rapidly along the fcc grain boundaries. During recrystallization after conventional cold rolling, the NiAl precipitates effectively suppress the grain growth, which results in the ultrafine-grained microstructure. It should be noted that no severe plastic deformation is necessary to obtain the microstructure. The volume fraction of the NiAl precipitates increases with increasing x. As a result, the average grain size of the fcc matrix (dm) after the recrystallization decreases with increasing x, and therefore, a minimum dm of 0.5 μm can be obtained at x = 0.5. The grain refinement by the NiAl precipitates is consistent with the Zener-Smith model. At x = 0.5, the alloy with dm = 0.5 μm exhibits a yield stress of 1163 MPa and an elongation of 24% at room temperature.

Tribological properties of nano/ultrafine-grained FeCoCrNiMnAlx high-entropy alloys over a wide range of temperatures

2020 ◽  
Vol 817 ◽  
pp. 153305 ◽  
Author(s):  
Hu Cheng ◽  
Yihang Fang ◽  
Jiamin Xu ◽  
Chaode Zhu ◽  
Pinqiang Dai ◽  
...  
Keyword(s):  
Tribological Properties ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Ultrafine Grained ◽  
Wide Range
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