首页|Combined effects of ultrasonic vibration and FeCoNiCrCu coating on interfacial microstructure and mechanical properties of Al/Mg bimetal by compound casting

Combined effects of ultrasonic vibration and FeCoNiCrCu coating on interfacial microstructure and mechanical properties of Al/Mg bimetal by compound casting

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In this work,a new treatment method combining ultrasonic vibration with FeCoNiCrCu high entropy alloy(HEA)coating was used to prepared Al/Mg bimetal through the lost foam compound casting.The effects of composite treatment involving ultrasonic vibration and HEA coating on interfacial microstructure and mechanical properties of Al/Mg bimetal were studied.Results demonstrate that the interface thickness of the Al/Mg bimetal with composite treatment significantly decreases to only 26.99％of the thickness observed in the untreated Al/Mg bimetal.The HEA coating hinders the diffusion between Al and Mg,resulting the significant reduction in Al/Mg intermetallic compounds in the interface.The Al/Mg bimetal interface with composite treatment is composed of Al3Mg2 and Mg2Si/AlxFeCoNiCrCu+FeCoNiCrCu/δ-Mg+Al12Mg17 eutectic structures.The interface resulting from the composite treatment has a lower hardness than that without treatment.The acoustic cavitation and acoustic streaming effects generated by ultrasonic vibration promote the diffusion of Al elements within the HEA coating,resulting in a significant improvement in the metallurgical bonding quality on the Mg side.The fracture position shifts from the Mg side of the Al/Mg bimetal only with HEA coating to the Al side with composite treatment.The shear strength of the Al/Mg bimetal increases from 32.16 MPa without treatment to 63.44 MPa with ultrasonic vibration and HEA coating,increasing by 97.26％.

ultrasonic vibrationFeCoNiCrCu HEA coatingAl/Mg bimetalinterfacial microstructureshear strengthcompound casting

Yuan-cai Xu、Wen-ming Jiang、Qing-qing Li、Ling-hui Yu、Xiao-peng Yu、Zi-tian Fan

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State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaAnalytical and Testing Center,Huazhong University of Science and Technology

522711025207519852205359

2024

10.1007/s41230-024-4113-7

中国铸造
沈阳铸造研究所

中国铸造

CSTPCDEI
影响因子：0.299
ISSN：1672-6421
年,卷(期)：2024.21(5)