Microstructures and properties of Fe1.25CoNi1.25CrxAl0.25 high-entropy alloys after cold-rolling and annealing

The microstructure and hardness changes of a non-equiatomic Al5Cr12Fe35Mn28Ni20high-entropy-alloys (HEA) with cold rolling are presented here. Using a variety of characterization methods, it is shown that the alloy is single FCC phase structure which doesn't change with cold rolling up to90%CR. With increasing the cold rolling reduction ratio, the hardness increased and the dendritic structures are broken and refined.

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Breakthrough the strength-ductility trade-off in a high-entropy alloy at room temperature via cold rolling and annealing

Materials Science and Engineering A ◽

10.1016/j.msea.2020.140264 ◽

2021 ◽

Vol 800 ◽

pp. 140264

Author(s):

Wei Zhang ◽

Zhichao Ma ◽

Hongwei Zhao ◽

Luquan Ren

Keyword(s):

Cold Rolling ◽

Room Temperature ◽

High Entropy Alloy ◽

Trade Off ◽

High Entropy ◽

Cold Rolling And Annealing

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Grain refinement of non-equiatomic Cr-rich CoCrFeMnNi high-entropy alloys through combination of cold rolling and precipitation of σ phase

Materials Science and Engineering A ◽

10.1016/j.msea.2018.08.038 ◽

2018 ◽

Vol 735 ◽

pp. 191-200 ◽

Cited By ~ 11

Author(s):

Ken Cho ◽

Yumi Fujioka ◽

Takeshi Nagase ◽

Hiroyuki Y. Yasuda

Keyword(s):

Cold Rolling ◽

Grain Refinement ◽

High Entropy Alloys ◽

Σ Phase ◽

High Entropy

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Strengthening of a CoCrFeNiMn-Type High Entropy Alloy by Regular Arrays of Nanoprecipitates

Materials Science Forum ◽

10.4028/www.scientific.net/msf.941.772 ◽

2018 ◽

Vol 941 ◽

pp. 772-777 ◽

Cited By ~ 2

Author(s):

Nikita Stepanov ◽

Dmitry Shaysultanov ◽

Margarita Klimova ◽

Vladimir Sanin ◽

Sergey Zherebtsov

Keyword(s):

Cold Rolling ◽

Coarse Grained ◽

High Entropy Alloy ◽

Face Centered Cubic ◽

High Entropy ◽

Single Face ◽

Cold Rolling And Annealing ◽

M23c6 Type ◽

Face Centered ◽

Fcc Phase

In this paper, we report microstructure and mechanical properties evolution of the CoCrFeNiMn-type high entropy alloy, containing small amounts of Al and C, during cold rolling and subsequent annealing at 700-1100°C. In the initial as-cast condition the alloy has coarse-grained single face-centered cubic (fcc) phase structure. Cold rolling and annealing substantially refine fcc grains; in addition M23C6 type carbides appear. After annealing at relatively low temperatures (≤900°C), these particles are arranged in characteristic arrays aligned with rolling directions. The specific microstructure of the thermomechanically processed alloy is suggested to be the reason of the balanced combination of tensile strength and ductility.

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