Influence of ball milling process and annealing treatment on microstructure of FeCrNiMo high-entropy alloy powder via mechanical alloying

doi:10.13251/j.issn.0254-6051.2025.04.004

Abstract

Abstract: FeCrNiMo high-entropy alloy powder was prepared via mechanical alloying, and the effects of ball milling control agent content, milling time and annealing on the preparation and microstructure of the FeCrNiMo high-entropy alloy powder were investigated. The results show that the addition of an appropriate mass fraction of anhydrous ethanol during the ball milling process improves the powder productivity after mechanical alloying of the high-entropy alloy powder. With the extension of ball milling time, the diffraction peak position shifts, and the peak broadens due to the occurrence of cold welding in the high-entropy alloy powder. After ball milling for 50 h, the peak shape nearly remains unchanged, the distribution of high-entropy alloy powder particles becomes more uniform, and a good refinement effect is achieved. After annealing at 400 ℃, 500 ℃, and 600 ℃ for 1 h, the phase composition of the FeCrNiMo high-entropy alloy powder remains unchanged and still consists of FCC and BCC phases. With the annealing temperature further increases, Co₇Mo₆ and Mo_1.24Ni_0.76 phases precipitate in the high-entropy alloy powder, and the powder particles agglomerate and increase in size.

Key words: high-entropy alloy, mechanical alloying, ball milling process, annealing

CLC Number:

TG135

Qie Liangliang, Zhang Jinwei, Zhao Benben, Zhang Man. Influence of ball milling process and annealing treatment on microstructure of FeCrNiMo high-entropy alloy powder via mechanical alloying[J]. Heat Treatment of Metals, 2025, 50(4): 28-33.

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