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Journal of Nanomaterials
Volume 2016, Article ID 6034790, 12 pages
http://dx.doi.org/10.1155/2016/6034790
Research Article

Microstructure and Mechanical Properties of Mg/2 wt.%SiCp Nanocomposite Fabricated by ARB Process

School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

Received 5 May 2016; Revised 31 August 2016; Accepted 8 September 2016

Academic Editor: Domenico Acierno

Copyright © 2016 Zheng Lv et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Magnesium matrix nanocomposites (MMNC, the same below) containing 2 wt.% nanosized were fabricated through accumulative roll bonding (ARB). The microstructure and mechanical properties of Mg/2 wt.% nanocomposites are reported for various ARB cycles. To evaluate microstructure of the nanocomposites, the field emission scanning electron microscope (FE-SEM), X-ray diffractometer (XRD), and transmission electron microscope (TEM) were applied. After fourteen ARB cycles, the nanocomposite showed a homogeneous distribution of reinforcements and a significant reduction in average matrix grain size. Meanwhile, the nanocomposite revealed a higher percentage of recrystallization and lower intensity of basal texture as compared to monolithic Mg. Mechanical properties were investigated through tensile and microhardness tests. The strength and elastic modulus and microhardness of Mg/2 wt.% were found to be improved significantly from eight ARB cycles and reach maximum values at fourteen ARB cycles. The ultimate tensile strength, yield strength, microhardness, and elastic modulus of Mg/2 wt.% are considerably increased by 17.6%, 61.0%, 72.7%, and 80.8% as compared to raw Mg, respectively.