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Influence of the Microstructure and Mechanical Properties of a Hypoeutectic Al-10Mg2Si In Situ Composite with Yttrium Addition: Influence of the Microstructure and Mechanical Properties of a Hypoeutectic Al-10Mg2Si In Situ Composite with Yttrium Addition: F. Zhao, X. Zhao, Bi, Zhu, Li, Qin, Liu, Wei, R. Zhao, and Wu

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Title: Influence of the Microstructure and Mechanical Properties of a Hypoeutectic Al-10Mg2Si In Situ Composite with Yttrium Addition: Influence of the Microstructure and Mechanical Properties of a Hypoeutectic Al-10Mg2Si In Situ Composite with Yttrium Addition: F. Zhao, X. Zhao, Bi, Zhu, Li, Qin, Liu, Wei, R. Zhao, and Wu
Authors: Zhao, Fachang1 (AUTHOR), Zhao, Xingming1 (AUTHOR) clzxm@lnut.edu.cn, Bi, JinLiang1 (AUTHOR), Zhu, Xiao2 (AUTHOR), Li, HongLin2 (AUTHOR), Qin, Guosheng1 (AUTHOR), Liu, Xue2 (AUTHOR), Wei, Wei1 (AUTHOR), Zhao, Rongda1 (AUTHOR) rongdazhaoln@126.com, Wu, Fufa1 (AUTHOR) ffwu@lnut.edu.cn
Source: JOM: The Journal of The Minerals, Metals & Materials Society (TMS). Mar2025, Vol. 77 Issue 3, p1183-1195. 13p.
Subjects: Lead alloys, Eutectic structure, Composite materials, Brittle fractures, Transmission electron microscopy
Abstract: Owing to their superior mechanical properties, Al-Mg2Si composite materials are widely employed in the aerospace, electronic, and automotive industries, among other fields. The microstructures of the Al-10Mg2Si composite materials with various Y contents were analyzed via x-ray diffraction (XRD), 3CCD real-color confocal microscopy (3CCD), field-emission scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Concurrently, the mechanical properties were assessed through hardness and tensile testing using a microhardness tester and a universal testing machine, respectively. The experimental results demonstrated that the addition of Y to the Al-Mg2Si alloy led to the formation of three distinct phases: α-Al, Mg2Si, and Al3Y. The primary growth of the Al-10Mg2Si alloy with Y inclusion led to a refinement of the α-Al structure and a modification of the eutectic Mg2Si structure. As the Y content increased, the strength and elongation of the Al-10Mg2Si alloy initially increased, followed by a decrease. The highest tensile strength and total elongation of the Al-10Mg2Si alloy with Y addition were 320 MPa and 6.2%, respectively. The addition of Y effectively refined the primary α-Al phases into a more circular shape, and the Al3Y phases served as heterogeneous nucleation sites. After modification, the fracture surface of the alloy changed from a large area of brittle fracture with complete cleavage planes and tearing edges to a ductile fracture with numerous tough dimples. Thus, this study presents a simple optimized method to enhance the modification efficiency of Y in hybrid Al-Mg2Si composites. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Owing to their superior mechanical properties, Al-Mg2Si composite materials are widely employed in the aerospace, electronic, and automotive industries, among other fields. The microstructures of the Al-10Mg2Si composite materials with various Y contents were analyzed via x-ray diffraction (XRD), 3CCD real-color confocal microscopy (3CCD), field-emission scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Concurrently, the mechanical properties were assessed through hardness and tensile testing using a microhardness tester and a universal testing machine, respectively. The experimental results demonstrated that the addition of Y to the Al-Mg2Si alloy led to the formation of three distinct phases: α-Al, Mg2Si, and Al3Y. The primary growth of the Al-10Mg2Si alloy with Y inclusion led to a refinement of the α-Al structure and a modification of the eutectic Mg2Si structure. As the Y content increased, the strength and elongation of the Al-10Mg2Si alloy initially increased, followed by a decrease. The highest tensile strength and total elongation of the Al-10Mg2Si alloy with Y addition were 320 MPa and 6.2%, respectively. The addition of Y effectively refined the primary α-Al phases into a more circular shape, and the Al3Y phases served as heterogeneous nucleation sites. After modification, the fracture surface of the alloy changed from a large area of brittle fracture with complete cleavage planes and tearing edges to a ductile fracture with numerous tough dimples. Thus, this study presents a simple optimized method to enhance the modification efficiency of Y in hybrid Al-Mg2Si composites. [ABSTRACT FROM AUTHOR]
ISSN:10474838
DOI:10.1007/s11837-024-06947-y