انتشار مقاله عضو هیأت علمی گروه مهندسی مواد در زمینه خواص مکانیکی کامپوزیتهای آلومینیومی Al۷۰۷۵ تقویتشده
این تحقیق به بررسی تأثیر افزودن نانوذرات Al₂O₃ و گرافن در فاصلههای مختلف بین حفرات در فرآیند جوشکاری اصطکاکی و تأثیر عملیات حرارتی بر انرژی شکست نمونهها با استفاده از آزمون ضربه چارپی پرداخته است که نتایج نشان میدهد فاصله بیشتر بین حفرات موجب پراکندگی بهتر نانوذرات و افزایش انرژی شکست میشود.
Title
Effect of Inter-Cavity Spacing and Heat Treatment in Friction Stir Processing/Welding (FSP/FSW) Al7075 Composites Containing Al<sub>2</sub>O<sub>3</sub> and Graphene Nanomaterials using Charpy Impact Test.
Abstract
In this research, the friction stir process by adding Al2O3 and graphene nanoparticles at two different distances have been investigated. Nanoparticles are inserted in cavities with a diameter of 2 mm and a depth of 3 mm. Nanoparticles of Al2O3, graphene, and equal compositions of Al2O3 and graphene, each with two cavity spacings of 8 and 10 mm, have been performed in six different groups of friction stir process. From each group, Six Charpy specimens were separated. Charpy impact test was performed on six samples, three of which were heat-treated after the friction stir process. Charpy impact test has shown that the specimens have higher fracture energy after heat treatment. Also, in all cases, the fracture energy at the distance between the two cavities are10 mm more than the distance of 8 mm, this is since nanoparticles do not accumulate at a more distance. Also, to observe the resulting microstructures using optical microscopy and scanning electron microscopy on the friction welding process and the fracture surface of Charpy impact specimens were performed. The results show that the nanoparticles are accumulated in some samples and well dispersed in the materials in others.
Keywords Aluminum Matrix Composites, Al2O3, Charpy Impact Test, Friction Stir Processing, Grapheme, Nanoparticle
خاطر نشان میگردد این مقاله در سال 2023 در ژورنال Advanced Design and Manufacturing Technology چاپ شده است.
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