石墨烯纳米片/AZ91镁基复合材料的显微组织与力学性能

doi:10.11896/j.issn.1005-023X.2018.10.018

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Abstract Graphene nanosheets (GNPs) reinforced AZ91 alloy matrix composite was fabricated by a casting method. The mechanical properties of the composite were tested. The microstructure, interfacial bonding structure and fractographs of the as-cast composite were characterized and analyzed via optical microscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) equipped with energy-dispersive spectrometer (EDS). The strengthening mechanism of GNPs/AZ91 composite was discussed in detail. The results showed that GNPs can effectively refine the grain sized of AZ91 alloy. The yield strength, elongation and microhardness of AZ91-0.1GNPs composite was (164±5) MPa,(7.7±0.1)% and (74.2±2)HV, increasing by 37.8%,13.2% and 24.7%, respectively, compared to that of as-cast AZ91 alloy. A strong interfacial bonding between GNPs and the matrix of α-Mg have been formed, which is beneficial to the fine-grain strengthening, stress transfer strengthening and so on, resulting in a significant improvement in the tensile strength, ductility and other mechanical properties of magnesium alloy.

Key words： casting method AZ91 magnesium alloy graphene nanosheets composite mechanical properties

Published: 06 July 2018

CLC number:	TG146.2+2
	TB333

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	Articles by authors
	YUAN Qiuhong
	ZHOU Guohua
	LIAO Lin

Cite this article:

YUAN Qiuhong,ZHOU Guohua,LIAO Lin. Microstructure and Mechanical Properties of Graphene Nanosheets Reinforced AZ91 Alloy Matrix Composite[J]. Materials Reports, 2018, 32(10): 1663-1667.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.10.018 OR http://www.mater-rep.com/EN/Y2018/V32/I10/1663

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