Basma Fener Sultan

Year: 2023

Academic Degree: PhD

Supervisor Type: Co-supervisor

Supervisor State: Graduated

Fabrication and Characterization of Magnesium Based (AZ31) and (Mg-Zn) Composites by Powder Metallurgy for Biomedical Applications

Pari Adnan Fareek

Year: 2022

Academic Degree: Master

Supervisor Type: Co-supervisor

Supervisor State: Graduated

Numerical validation of hybrid nanofluid (TiO2-ZnO//Water) mixed convection flow in a backward facing step channel

Hudhaifa Taha Ali

Year: 2022

Academic Degree: Master

Supervisor Type: Co-supervisor

Supervisor State: Graduated

Experimentally heat transfer enhancement for cooling CPU of computer using nanofluids

Murad Ahmed Fakhrulddin

Year: 2022

Academic Degree: Master

Supervisor Type: Co-supervisor

Supervisor State: Graduated

A comparative study of a hybrid voltaic system using a phase changing material and a nanofluid

Nawal Ali Abd

Year: 2021

Academic Degree: PhD

Supervisor Type: Co-supervisor

Supervisor State: Graduated

Characterization and effect of nano and micro TiC reinforcement particles on the properties of Copper matrix composites

Penar Kgaleel Hussien

Year: 2021

Academic Degree: Master

Supervisor Type: Co-supervisor

Supervisor State: Graduated

Improvement the thermal performance of the heat exchanger with nanoparticles coated on the surface

Ayshan Mohammed Shukri Yunus

Year: 2021

Academic Degree: Master

Supervisor Type: Co-supervisor

Supervisor State: Graduated

The effect of welding pass number on the mechanical and metallurgical properties of similar welds of pure aluminum (AA 1050-H14) produced by friction stir welding

Murad Nehad Mardan

Year: 2017

Academic Degree: Master

Supervisor Type: Supervisor

Supervisor State: Graduated

Performance Evaluation of a shell and tube heat exchanger by using different types of metals and flow solutions

Fouad Ramadhan Muhi-Aldeen

Year: 2016

Academic Degree: Master

Supervisor Type: Co-supervisor

Supervisor State: Graduated

Mechanical and physical properties Behavior of hybrid copper-graphite composite reinforced with Y2O3 and Sn particles prepared via powder metallurgy technique

PhD

Oct 15, 2016 - Jun 29, 2019

I received my PhD degree from University of Technology, Baghdad – Iraq at 2019.

Effect of some factors on the thermal performance of shell and tube heat exchanger

Apr 1, 2017

Journal Journal of Engineering and Applied Sciences

publisher ©Medwell Journals

DOI 10.3923/jeasci.2017.715.721

Issue 3

Volume 12

This research aimed to study the effect of 0.1 M of HCl, H2SO, and NaCl solutions at 61°C on the thermal performance and corrosion behavior of commercially pure copper tubes in the used Shell and Tube Heat Exchanger (STHE). The tests are performed with a counter-flow arrangement for 120 h. The flow rates for the tube side solution (aqueous solution) and shell side solution (tap water) adjusted and kept constant at 150 and 50 L h', respectively. According to the obtained results, the greater decrease in thermal performance is observed in HCl solution than in H2SO, solution and finally in NaCl solution with a decrease in percentage & were (11.6, 10.1 and 6.9), respectively. Besides, the results of visual inspection of the interior tubes walls degradation and variation of the used aqueous solution characteristics are showed that the HCl acid solution is more corrosive than H2SO, acid and NaCl salt solutions. The XRD analysis results revealed that the corrosion products are formed by more than one reaction mechanism and formed different hydrated and complex corrosion products.

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Mechanical and Physical Properties of Hybrid Cu-Graphite Composites Prepared via Powder Metallurgy Technique

Mar 31, 2017

Journal Tikrit Journal of Engineering Sciences

publisher Tikrit University

DOI http://dx.doi.org/10.25130/tjes.24.1.02

Issue 1

Volume 24

Copper -graphite composites are widely used in a great number of engineering applications such as brushes, switches, sliding bearings, self-lubricating bearings, etc. due to their good thermal and electrical conductivity and excellent tribological properties as compared with other structural materials. There are ongoing attempts in manufacturing copper composites with better properties to enhance their efficiency and increase their effective life. Present research aims to prepare hybrid 95wt.% copper –5wt.% graphite composites reinforced with yttria and tin particles by powder metallurgy technique and to study their effects on mechanical and physical properties of the prepared composites. Powder mixture was mixed by ball mill mixer at 100rpm for 120min with (5/1) balls to powder ratio. The powder mixture was cold pressed at 700MPa for 30sec, followed by sintering at 900 ˚C for one hour. In the first stage, Yttria(Y2O3) was added with (2, 4, 6, 8, 10) wt% to pure copper (Cu) and to (95%Cu-5%Gr) matrices. Typical composite of this stage was ((95%Cu-5%Gr)-4%Y2O3. In the second stage, tin (Sn) was added with (2, 4, 6, 8, 10) wt% to pure copper and((95%Cu-5%Gr)-4%Y2O3 matrices. Typical composite of this stage was ((95%Cu-5%Gr)-4%Y2O3)-6%Sn. The results showed that hardness and true porosity of the composites increases with increasing yttria content. On the other hand, both thermal and electrical conductivity of the composites decreases with increasing yttria content. It was also found that (95 wt.% Cu- 5 wt.% Gr) – Y2O3 composites have always lower wear rate than plain Cu-Y2O3 composites.

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Study the Increasing of the Cantilever Plate Stiffness by Using Stiffeners

Apr 1, 2015

Journal International Journal of Scientific & Engineering Research

publisher IAEME

DOI -

Issue 4

Volume 6

The present work is aimed to study the static bending analysis of the rectangular cantilever plate with different shaped stiffeners. The rectangular thin plate is considered and its deflection due to acting load at the free tip is simulated by static analysis using FEM and (ANSYS) software then compared with exact analysis. The analysis is performed for the rectangular plates with different cross-section area stiffeners. The stiffeners area added to the plate area, or the cross section area of the plate with and without stiffeners kept constant to keep the plate weight constant. The plate and stiffeners assumed to be as rigid coupling. The static deflection is performed for different geometries of stiffeners. The boundary conditions for all plates considered as cantilever plate. In this work, by using of finite element method analysis and exact analysis for thin plate theory, five different shape stiffeners are considered, including square, triangle, trapezoidal and T-section with two different thicknesses. For more easily analysis the plate behavior considered as beam behavior because the plate width is very small in compare with the plate length. For all stiffener types, at first the length, thickness and width of the plate are assumed constant and the area of stiffeners added to the plate section, then in the second case the cross section area of the plate with and without stiffeners assumed as constant, (i.e., the cross section area of the plate and stiffener equal to the flat plate cross section area). The results showed that the adding of the stiffeners with each geometry shape and size to the plates are increased the plate stiffness. The plate with square stiffener become stiffer than others, but with more added mass and area. The 1mm T-shape stiffener gave stiffness near to the equivalent rectangular plate with lower added mass and area.

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EXPERIMENTAL INVESTIGATION OF CONVECTION HEAT TRANSFER FOR LAMINAR FLOW IN AN INCLINED ANNULUS

Apr 17, 2014

Journal International Journal of Mechanical Engineering and Technology (IJMET

publisher IAEME

DOI -

Issue 4

Volume 5

The present paper investigate convection heat transfer for laminar flow in an inclined concentrated with 54mm outside diameter and 800 mm length pipe. The pipe was exposed to constant heat flux of 529 W/m2 by other internal tube which was an electric element with 6.3 mm diameter and 600mm length. The pipe kit was rotated by ten declination angles, which were varied from (0O to 90O) by 10O for each step. Results showed that the effect of declination angle was proportioned inversely with the value of heat transfer coefficient, where the maximum reduction in value of heat transfer coefficient was obtained in vertical position, which was about 6.596%. Reynolds number was also varied inversely with declination angle from 1750 to 1700. The comparison between experimental results and correlation relation results, showed that both results closed to each other up to declination angle value equal to (40o).

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STUDY THE EFFECT OF COOLING RATE ON SOME PROPERTIES AND WEAR OF BRASS

Jan 1, 2012

Journal مجلة التقني

publisher هيئة التعليم التقني

DOI -

Issue 5

Volume 25

This research is devoted to study the effect of cooling rate on surface hardness; microstructure and wear of brass type (C 26800) under dry sliding conditions, where cooling rate rapidity was controlled by changing the used casting mould wall thickness and type. It has been observed increasing of the surface hardness of castings by increasing cooling rate and occurrence of differences in the fashion of the microstructures and their grain size by varying cooling rate. Also the wear of yellow brass over steel disc using pin-on-disc technique has been studied. An increase in wear rate and surface damage of brass was observed also by decreasing the cooling rate. Key words: Cooling rate,Wear of yellow brass, Microstructure of yellow brass.

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Study the Wear and Friction of Free Cutting Brass Under Dry Sliding Condition

Dec 1, 2010

Journal مجلة تكريت للعلوم الهندسية

publisher Tikrit University

DOI -

Issue 4

Volume 17

This research is devoted to study the wear resistance, coefficient of friction and contact temperature of free cutting brass under dry sliding wear conditions over steel counterface disc using pin-on-disc technique. Five load values 3.5, 7, 11, 15 and 20 N were used at constant sliding speed 10.4458 m.s-1 and time 30 min. An increase in wear rate and surface damage of brass specimens was observed by increasing the applied load and a transition from mild to severe wear was occurred at 11 N. A plastic deformation phenomena at macroscopical scale when applying 20 N was detected at the contact surfaces of the brass specimens. The average of the measured contact temperatures of brass was increased from 94 to 268 oC by increasing the applied load from 3.5 to 20 N, while the smallest and greatest calculated kinetic friction coefficient for the sliding pair( free cutting brass / steel) was 0.49 and 0.67 at applied loads 7 and 20 N respectively. Furthermore, an important observations were revealed which includes oxidation and dezincification of the wear rate and contact temperature measuring specimens respectively at their external surface contacting the iron housing far from their contact surfaces with steel disc at 20 N applied load.

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The Effect of Using Insulation on the Energy Saving in Building

Sep 1, 2010

Journal مجلة تكريت للعلوم الهندسية

publisher Tikrit University

DOI -

Issue 3

Volume 17

The aim of the present study is to analyze the thermal performance of a building which is of 600 m3 size. The building is built in three different models. In the first model, walls are built with brick. In the second model, a layer of foam (Polystyrene) of 4 cm thickness has been used as an insulation layer inside walls and on the roof. In the third model, walls are constructed from two parts separated by air gap of 8 cm wide; moreover, a secondary roof is added to this model. A Qbasic program is prepared to simulate the required mathematical equations in finite difference method and the weather conditions data of Baghdad city at January, 1994. The results of the simulation showed that the ratio of the saved energy by the second and third models with respect to the first model are 29.96%, and 35.40% respectively.

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CORROSION OF COPPER WELDMENTS IN SALTY AND ACIDIC SOLUSIONS

Mar 1, 2008

Journal مجلة تكريت للعلوم الهندسية

publisher Tikrit University

DOI -

Issue 1

Volume 15

The present study is conducted by exposing copper weldement specimens which were prepared by oxy-acetylene welding operation for copper tube by using tin-bronze alloy as a filler metal , to salty and acidic aqueous solutions containing respectively (0.5, 1.5 and 3) wt% NaCl and (0.5, 1 and 2) wt%H2SO4. The corrosion behavior of weldements showed a general decrease in corrosion rates in salty solutions with increasing of exposure time. The same thing happened to the weldement specimen which was exposed to the acidic solution containing (0.5) wt%H2SO4, while the corrosion rate of the weldements which exposed to the acidic solution containing (1 and 2)wt%H2SO4 was dropped during the first (288 hr) of exposure then a relative increase was observed by increasing the exposure time. Also the results of the calculated total corrosion rates (CrT) indicated higher value for the weldements exposed to acidic solution if they compared with those values obtained with salty solution for (696 hr) exposure. Furthermore; the examinations by optical microscope for the weldements indicated presence of pitting corrosion at welding zones by exposing the weldement to both salty and acidic solutions, while the general corrosion had a moderate appearance of the cupric part for weldements tested by these two solutions.

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THE EFFECT OF SOME HEAT TREATMENTS ON THE PROPERTIES OF MEDIUM CARBON STEEL

Nov 1, 2005

Journal مجلة تكريت للعلوم الهندسية

publisher Tikrit University

DOI -

Issue 4

Volume 12

The present study is aimed to compare between the effect of the modified isothermal annealing with conventional full annealing and normalizing on the properties of medium carbon steel by full annealing and normalizing tensile test and other disc like shape specimens by heating them at (860oC) for (15min); followed by slowly cooling inside furnace for the former treatment and by air cooling for the later to room temperature. The modified isothermal annealing was conducted by heating eight group of specimen ( each groups includes a tensile and a disc like shape specimen) respectively at (860oC) for (15min), then slowly cooled inside furnace to different temperatures (760,700,600,560,460,380,340,and 260) oC then each group is soaked at one of those temperatures for an (1hr), then air cooled to room temperature .Larger (σT) which exceed (800MPa) and (VHN) values of the treated specimens at (760 oC) were obtained when compared with those obtained by normalizing. While an increase was took place in value of the treated specimens ε% at (260 oC) over its value when full annealed , hence the formability was improved by treating at. (260 oC) isothermally with a reduction in consumed electric energy because of the shorter thermal cycle. Also the toughness was considered by evaluating the restricted areas under stress - strain curves. Finally the resulted variations in microstructures were observed by optical microscope

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Diffusion between aluminum and iron

Jan 1, 1998

Journal Tikreet University Journal of Science

publisher Tikreet University

DOI -

Issue 1

Volume 4

This study has been conducted on specimens of Iron (with no Carbon content) and Aluminum powders. The specimens produced by cold work operation, then heated at 625°C for time intervals between (3-18 hr), then slowly cooled down to R.T. The specimens microstructure photographed were examined by optical microscope. It has been observed from photographs, that increasing of heating time decreases porosity numbers and increases remained Iron powder particles in the structure, also the green strength has been increased. Photographs showed that the Iron atoms diffused in Aluminum structure directly from Iron powder particles which surrounded Aluminum particles, or from the Iron strips and small Iron grains that penetrated into the Aluminum structure. The measurement of diffusion coefficient of Iron in Aluminum at 625 °C was 1.1217 x 10-10 cm2/sec which is greater than the value of diffusion coefficient of Aluminum in Iron at the same temperature which has been measured graphically, by other authors which was 9.3 x 10-13 cm2/scc.

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