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Article
Effect of Nano BN Addition on the Properties of an Aluminum Metal Matrix Composite

Authors: Fadhal A. Hashim --- Niveen J. Abdulkader --- Nibras S. Jasim
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 6 Part (A) Engineering Pages: 691-695
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In the present work, the wear rate and hardness of recycled Aluminum alloy based metal matrix composite that reinforced with nano Boron Nitride with (2%, 4%, 6%, and 8%) weight percentage with 33 nm particle size were evaluated. A stir casting process was applied to fabricate composite the mechanical and metallurgical characteristics of the fabricated composite were evaluated through the hardness and wear test. The results indicate that the value of hardness increased and wear rate decreased with increasing the BN percentage due to high surface area to weight ratio for nanoparticles.


Article
Processing and Properties of ZA-27 Alloy Metal Matrix Hybrid Composite Reinforced with Nanonitrides

Authors: Fadhil A. Hashim --- Niveen J. Abdulkader --- Kateralnada F. Hisham
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2020 Volume: 38 Issue: 1 Part (A) Engineering Pages: 57-64
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In general, internal vibrations within the pipelines caused by fluids being passing through a pipeline system can cause. These pipeline system can damage by the sudden amplified vibrations that were not considered at the design of the system, and flow induced vibrations resonate with the pipes natural frequency. Therefore, it is important to predict and identify the pipeline system vibrations during its lifetime. In this study by using MATLAB code as a CFD solver, it studied the forced and free vibrations caused by fluid flows at Reynolds number ranged as 0 < Re < 2500 for laminar flow and ranged as 104 < Re < 105 for turbulent flow. The working fluid has chosen as of (Al2O3, TiO2, SiO2 and water) with different nanoparticle volume fraction of (0 to 2% vol.). These fluids flow in simply supported pipe with different lengths and diameters. The results presented the effect of pipe and fluid parameter upon the fluid critical velocity and fundamental natural frequencies. The results showed that the pipe natural frequency increased with increasing with decreasing the pipe length and diameter. In addition, it showed that the pipe natural frequency decreased when using the different nanoparticle depressed in the water and with increasing the volume fraction.


Article
Physical Properties Study on Ti-C/NanoCeramics Composite

Authors: Ahmed M. Al-Ghaban --- Niveen J. Abdulkader --- Hadeel A. Al baiaty
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 11 Part (A) Engineering Pages: 1185-1188
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The effect of introducing Al2O3 and CuO nano particles on thephysical properties of sintered Ti-C based materials has been studied.Titanium and carbon elemental powders have been mixed with nanoparticlesof Al2O3 and CuO to produce composites of Ti-C/ceramics at 1100 °C. TheXRD results show that for different amount of mixed nanoparticles, TiC, TiO2,and some rest of the reacted powders are the most dominant stable phases. Interms of physical properties, the results show that the raised Al2O3 percentageleads to gradually increase in apparent density of the sintered mixture ascompared with the purely prepared TiC. Moreover, porosity and waterabsorption decrease with increasing Al2O3 percentage. On the other side,adding CuO to the sintered mixture causes in decreasing the apparent density.Furthermore, it was observed that CuO creates much porosity and increasewater absorption of the sintered mixture.


Article
Study Corrosion Behavior of Alumina Particulate / (AA6061) Aluminum Metal Matrix Composite In Marine Environment
دراسة سلوك التاكل للمواد المتراكبة المعدنية ذات اساس المنيوم 0606( AA ( المقواة بدقائق الالومينا في الظروف البحرية

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Abstract

In the present investigation, the static electrochemical corrosion behaviour of (AA6061) Al/Al2O3 composites in Marine (3.5% NaCl) Environment solution was evaluated. The composites were fabricated using liquid metallurgy. The effect of weight percentage (3%, 6%, 9% & 12%) on the corrosion behaviour of composites was investigated. The corrosion rates of composites were calculated using electrochemical method. The results showed that Al/Al2O3 composites have lower corrosion resistance than (AA6061) Aluminium.The corrosion rate was increased by increasing of weight percentage of the alumina particles. Optical microscope were carried out to identify the corroded surface.

تم في هذا البحث تقييم سلوك التاكل الكهروكيمياوي الساكن لسبيكة المنيوم ) 0606 AA) المقواة بدقائق من الالومينا في الظروف البحرية ) 5.3 % كلوريد الصوديوم( . حضرت المواد المتراكبة بتقنية ميتالورجيا الحالة السائلة حيث تم دراسة تأثير النسب الوزنية للدقائق ) 5% و 0% و 9% و 61 %( على سلوك التاكل. وقد تم حساب معدلات التاكل بالطريقة الكهروكيميائية . اظهرت النتائج ان المادة المتراكبة المنيوم المقواة بدقائق الالومينا تبدي اقل مقاومة تاكل مقارنة مع سبيكة الالمنيوم الاساس (AA6061) ،ووجد ان معدل التاكل يزداد مع زيادة النسب الوزنية لدقائق الالومينا. وقد استخدم المجهر الضوئي لمعرفة السطح المتاكل

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