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10.3390/ma18071511
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Article

Microstructural Optimization and Erosion–Corrosion Resistance of Cu-10Ni-3Al-1.8Fe-0.8Mn Alloy via Tailored Heat Treatment

by
Yi Yuan
1,2,3,†,
Yizhi Zhao
4,†,
Yicheng Cao
1,2,3,
Lue Huang
4,
Hao Chu
1,2,3,
Hongqian Wang
1,2,3,
Dongyan Yue
1,2,3 and
Wenjing Zhang
1,2,3,*
1
State Key Laboratory of Nonferrous Structural Materials, China GRINM Group Co., Ltd., Beijing 100088, China
2
GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China
3
General Research Institute for Nonferrous Metals, Beijing 100088, China
4
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Materials 2025, 18(7), 1511; https://doi.org/10.3390/ma18071511
Submission received: 25 February 2025 / Revised: 13 March 2025 / Accepted: 25 March 2025 / Published: 27 March 2025
(This article belongs to the Section Metals and Alloys)
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Abstract

This study systematically investigated the effects of tailored heat treatments on the microstructural evolution, mechanical properties, and erosion–corrosion resistance of Cu-10Ni-3Al-1.8Fe-0.8Mn alloy. Four heat treatment conditions—as-cast (AC-1); homogenized (H-2); and deformation–aged at 500 °C (D-3) and 750 °C (D-4)—were applied to elucidate the interplay between microstructure and performance. The D-3 specimen, subjected to deformation followed by aging at 500 °C for 0.5 h, demonstrated superior properties: a Vickers hardness of 118 HV5 (83.3% higher than H-2) and an erosion–corrosion rate of 0.0075 mm/a (84.1% reduction compared to H-2). These enhancements were attributed to the uniform dispersion of nanoscale Ni3Al precipitates within the matrix, which optimized precipitation strengthening and reduced micro-galvanic corrosion. The D-3 specimen also formed a dense, crack-free Cu2O corrosion product film with a flat matrix interface, confirmed by SEM cross-sectional analysis and electrochemical impedance spectroscopy (EIS), exhibiting the highest charge transfer resistance and film impedance.
Keywords: copper–nickel alloy; heat treatment; erosion–corrosion; Ni3Al copper–nickel alloy; heat treatment; erosion–corrosion; Ni3Al

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MDPI and ACS Style

Yuan, Y.; Zhao, Y.; Cao, Y.; Huang, L.; Chu, H.; Wang, H.; Yue, D.; Zhang, W. Microstructural Optimization and Erosion–Corrosion Resistance of Cu-10Ni-3Al-1.8Fe-0.8Mn Alloy via Tailored Heat Treatment. Materials 2025, 18, 1511. https://doi.org/10.3390/ma18071511

AMA Style

Yuan Y, Zhao Y, Cao Y, Huang L, Chu H, Wang H, Yue D, Zhang W. Microstructural Optimization and Erosion–Corrosion Resistance of Cu-10Ni-3Al-1.8Fe-0.8Mn Alloy via Tailored Heat Treatment. Materials. 2025; 18(7):1511. https://doi.org/10.3390/ma18071511

Chicago/Turabian Style

Yuan, Yi, Yizhi Zhao, Yicheng Cao, Lue Huang, Hao Chu, Hongqian Wang, Dongyan Yue, and Wenjing Zhang. 2025. "Microstructural Optimization and Erosion–Corrosion Resistance of Cu-10Ni-3Al-1.8Fe-0.8Mn Alloy via Tailored Heat Treatment" Materials 18, no. 7: 1511. https://doi.org/10.3390/ma18071511

APA Style

Yuan, Y., Zhao, Y., Cao, Y., Huang, L., Chu, H., Wang, H., Yue, D., & Zhang, W. (2025). Microstructural Optimization and Erosion–Corrosion Resistance of Cu-10Ni-3Al-1.8Fe-0.8Mn Alloy via Tailored Heat Treatment. Materials, 18(7), 1511. https://doi.org/10.3390/ma18071511

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