L12型纳米有序相析出强化(FeNiCoCr)93Al5Ti2高熵合金

doi:10.11896/cldb.23110207

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Abstract High entropy alloys(HEAs) with face-centered cubic structure strengthened by L1₂-type nano-ordered precipitates can obtain ideal strength-ductility equilibrium. In the present study, (FeNiCoCr)₉₃Al₅Ti₂ HEA reinforced by L1₂-type nano-ordered precipitation phase was prepared by hot pressing technique. It could be found that the alloy was consisted of FCC matrix phase, a small amount of Cr-rich phase, and Fe-rich phase. Spheroidal L1₂-type structured Ni₃(Al, Ti) particles were precipitated inside the matrix grains and had a coherent relationship with the matrix phase. It was estimated that the incremental contribution of ordered strengthening to the yield strength of the alloy was 221.0 MPa, which was much higher than that of the coherent dispersion strengthening and the modulus mismatch strengthening. The (FeNiCoCr)₉₃Al₅Ti₂ HEA exhibited excellent compressive properties, as its engineered yield strength, compressive strength, and compressive strain were 717 MPa, 2 304 MPa, and 44%, respectively.

Key words： high entropy alloy nano-precipitation phase microstructure mechanical property

Published: 25 November 2024 Online: 2024-11-22

CLC number:

TG146

Fund:Natural Science Foundation of Shaanxi Province (2023-JC-ZD-22).

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	WANG Peijin
	ZHUO Jiale
	AI Taotao
	DONG Hongfeng

Cite this article:

WANG Peijin,ZHUO Jiale,AI Taotao, et al. L1₂-type Nano-ordered Precipitation Phase Reinforced (FeNiCoCr)₉₃Al₅Ti₂ High Entropy Alloy[J]. Materials Reports, 2024, 38(22): 23110207-5.

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http://www.mater-rep.com/EN/10.11896/cldb.23110207 OR http://www.mater-rep.com/EN/Y2024/V38/I22/23110207

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