Influence of Laser Power on CoCrFeNiMo High-Entropy Alloy Coating Microstructure and Properties DOI Open Access
Shuai Li, Fuheng Nie,

Ding Ji-yuan

и другие.

Materials, Год журнала: 2025, Номер 18(11), С. 2650 - 2650

Опубликована: Июнь 5, 2025

This work studies the fabrication of CoCrFeNiMo high-entropy alloy (HEA) coatings via coaxial powder-fed laser cladding, addressing porosity and impurity issues in conventional methods. The HEA exhibited eutectic/hypereutectic microstructures under all power conditions. A systematic investigation effects (1750–2500 W) reveals that 2250 W optimizes microstructure performance, yielding a dual-phase structure with FCC matrix dispersed σ phases (Fe-Cr/Mo-rich). coating achieves exceptional hardness (738.3 HV0.2, 3.8× substrate), ultralow wear rate (4.55 × 10−5 mm3/N·m), minimized corrosion current (2.31 10−4 A/cm2) 3.5 wt.% NaCl. friction mechanism is high-speed wear, oxide film formed on surface coating, then rupture leads to adhesive abrasive wear. galvanic caused by potential difference between phase phase.

Язык: Английский

Advancements in particle-reinforced high-entropy alloy coatings: microstructure, mechanical properties and mechanisms DOI
Shuai Li,

Shuaizhe Ai,

Zhongying Liu

и другие.

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 180787 - 180787

Опубликована: Май 1, 2025

Язык: Английский

Процитировано

0
Oxygen Evolution Enhancement of Bulk FeCoNiAlMo High-Entropy Alloy through Electrochemical Dealloying in ChCl-EG Deep Eutectic Solvent DOI

Weijia Chen,

Changbin Hu,

J. Li

и другие.

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Май 31, 2025

High-entropy alloys (HEAs), which represent a new type of multielement alloys, have received growing research as potential electrocatalytic oxygen evolution reaction (OER) materials because their excellent catalytic performances. In this study, the FeCoNiAlMo HEA with an equal atomic ratio was used precursor to form three-dimensional porous structure through electrochemical dealloying in choline chloride ethylene glycol (ChCl-EG). At current density 10 mA cm-2, overpotential alloy reached low 274 mV, is lower than that commercial RuO2-IrO2. Furthermore, after long-term electrolysis, exhibited performance and good stability. Moreover, it deduced dual-phase Fe20Co20Ni20Al20Mo20 mainly composed face-centered cubic (FCC) body-centered (BCC) phases, its phase distribution morphology similar Turing structure. During process, owing different corrosion resistances elements elemental distributions within two FCC underwent preferential corrosion. This unique synergistically reduces energy barrier during water dissociation, imparting material significant advantage OER.

Язык: Английский

Процитировано

0
Influence of Laser Power on CoCrFeNiMo High-Entropy Alloy Coating Microstructure and Properties DOI Open Access
Shuai Li, Fuheng Nie,

Ding Ji-yuan

и другие.

Materials, Год журнала: 2025, Номер 18(11), С. 2650 - 2650

Опубликована: Июнь 5, 2025

This work studies the fabrication of CoCrFeNiMo high-entropy alloy (HEA) coatings via coaxial powder-fed laser cladding, addressing porosity and impurity issues in conventional methods. The HEA exhibited eutectic/hypereutectic microstructures under all power conditions. A systematic investigation effects (1750–2500 W) reveals that 2250 W optimizes microstructure performance, yielding a dual-phase structure with FCC matrix dispersed σ phases (Fe-Cr/Mo-rich). coating achieves exceptional hardness (738.3 HV0.2, 3.8× substrate), ultralow wear rate (4.55 × 10−5 mm3/N·m), minimized corrosion current (2.31 10−4 A/cm2) 3.5 wt.% NaCl. friction mechanism is high-speed wear, oxide film formed on surface coating, then rupture leads to adhesive abrasive wear. galvanic caused by potential difference between phase phase.

Язык: Английский

Процитировано

0