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دراسة انتقال الحرارة لمسبوكات المواد المنتجة بطريقة الطرد المركزي == A Study of The Heat Transfer For Alloys The Materials Produced By Use Centrifugal Casting

Author name: محمد قاسم محسن
Supervisor name: نوال عزت عبد اللطيف | كريمة اسماعيل عموري
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Technology
Language: Arabic
University location: Baghdad
First pages:
Abstract: تم كتابة برنامج حاسوبي بلغة فورتران (90) لدراسة الانتقال الحراري لبعدين(2 - D) بطريقة الفروقات المحددة المباشرة (Explicit Finite Difference Method) للمسبوكات ( Al - 4.5%Mg)،(Al - 7%Si)،المنتجة بطريقة السباكة بالطرد المركزي الافقية، اذ تم حساب سرعة دوران | Mathematical program writing completion by Fortran 90 to study the heat transfer in two dimensions(2 - D) by use explicit finite difference method for two alloys(Al - 4.5%Mg),(Al - 7%Si),this alloys were produced by the horizontal centrifugal casting, The mold rotation speed for the centrifugal casting was calculated and it was put in the mathematical program at the change of the mold rotation speed N=(100,1000,1500)rpm. And study the effect of the change of the mold rotation speed on the cooling rate and microstructure and hardness. We input to the mathematical program the boundary condition of the mold from (temperature ambient and heat transfer coefficient by convection of the alloys external)and input thermal physical properties of the alloys from (coefficient thermal conductivity of liquid and solidus,density of liquid and solidus, solid fraction, , specific heat of liquid and solidus, liquid temperature, latent heat of solidification, solidus temperature, alloys melting temperature),then we melted the alloys by use electric furnace and poured the melting alloys in the centrifugal casting mold after proceeding heating prematurely to the mold by used gaseous torch and fixing(digital thermal couple). We input to the mathematical program. And study the difference in mold rotation speed and it’s effected on the cooling rate of the both alloys and the mold and microstructure and hardness , and study the difference in the mold material effected on the cooling rate of the both alloys, and study effected the mold heating on the cooling rate of the both alloys. As a result we noted that the solidification time of the alloys is dependent upon the speed of rotation of the mold.

دراسة سلوك البلى الانزلاقي الجاف لسبائك المنيوم - 7% سليكون عمليا وباستخدام تقنية تصميم التجارب == Studying Dry Sliding Wear Behavior of Al - 7% Si Alloys Using Experimental And DOE Techniques

Author name: قاسم سعد عبد الواحد
Supervisor name: عقيل ظاهر صبحي | علي عبار خليف
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:
Abstract: تعد سبائك الالمنيوم - سليكون والتي تحتوي على التيتانيوم احدى المواد التي تتميز بمقاومتها للبلى كما بينت الدراسات والابحاث العلمية ذلك.في هذا البحث تم صب سبيكة المنيوم - 7% سليكون وبنسب مختلفة من التيتانيوم (0.5 , 1 , 1.5%) وتحت معدلات تبريد مختلفة في قال | Aluminum - silicon alloys that contain Titanium can be considered one of the wear resistant materials and attract several researchers recently.In this work ,Al - 7%Si alloy with different percentages of Ti ( 0.5 , 1 , 1.5% ) was poured under different solidification conditions into the metal mould.All prepared alloys were dry slided under different bearing pressures ( 5 , 10 , 15 , 20 , 25 N ) on the steel counterface surface using pin on disk wear apparatus. Optical microscope and scanning electron microscope (SEM) were used to study the microstructure and determine wear mechanism of Al - Si alloys respectively. On the other hand , X - ray diffraction technique (XRD) was used to determine the phases that were present in the matrix of Al - Si alloys.Microstructural analysis and X - ray diffraction showed that two phases are presented in the matrix of Al - 7%Si alloys.These phases are ? - aluminum and eutectic and three phases are present in the matrix of Al - Si alloys that contains Ti. These phases are ? - aluminum ,eutectic and titanium aluminide Ti9Al23.Significant refinement occurred for ? - aluminum, eutectic and titanium aluminide Ti9Al23 phases when using metallic mould cooled with cold water in comparison with heated and unheated metallic moulds Hardness was increased with increasing Ti percentage and with increasing the severity of solidification condition used.Remarkable changes in the wear rate occurred for Al - Si alloys during dry sliding in which the magnitude of wear rate was dependent on the Ti percentage ,load and solidification condition used.Design of experiment (DOE) was used to optimize the effect of process variables ( load and Ti percentage) on the wear rate under different solidification conditions using computational statistical software (Mintab 16).

تاثير التشكيل على البنية المجهرية وسلوك البلى للمواد المعدنية المتراكبة النانوية Al2O3 / A356 == The Role of Forming On Microstructure And Wear Behavior of Metal Nano Composite Al2O3 / A356

Author name: مروان باسل حسين
Supervisor name: نوال عزت عبد اللطيف | عقيل ظاهر صبحي
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:
Abstract: في هذا البحث تم تحضير المواد المركبة النانوية اساس معدني (A356/Al2O3) باستخدام تقنية (rheocasting) ومن ثم تم اجراء عملية التشويه على الساخن عند درجة حرارة °250 م.في البداية تم صهر السبيكة A356 في درجة حرارة °730 م بعدها تم تبريدها الى درجة حرارة الشبه ص | In the present work Al2O3/A356 nano composites have been prepared using rheocasting technique, the nano composites were then processed using hot deformation at 250 °C.Firstly A356 matrix alloy was melted at about 730 °C, the superheated molten alloy was allowed to cool to the semi - solid temperature at 600 °C, then Al2O3 nano - particles with different size (10,20) nm and different weight percentages (1 and 2)%wt were added inside the vortex formed due to stirring , hot deformation carried out with different ratio 30% and 40% at the temperatures of 250 °C and strain rates 0.1 s?1. The produced nano composites samples were characterized using optical and scanning electron microscopy ,X - ray diffraction , hardness test and wear test using pin on disc apparatus. The results of microstructural observations showed that the Al2O3 nano particles cluster mostly near the grain boundaries and form a band surrounding the grain boundaries. The dendritic structure of ? - Al phase is fragmented and the ? grains became more uniform and smaller than their corresponding as - cast 356 alloy. On other hand the microstructures of nano - Al2O3/A356 composites after casting and hot deformation at 250°C, showed modification of ? - Al and Si eutectic. The columnar dendrites ? - Al phase changed to the nearly equiaxed grains or globular morphology. The results of hardness test showed that the nano Al2O3/A356 composite were exhibited higher hardness than the as - cast A356 alloy The nano - composites hardness, increase with increases the size and increases in weight percentage of the Al2O3 nano - particles, and with increasing percentage deformation. The result of wear test showed that the hot deformed nano Al2O3 /A356 composites have greater wear resistance compared with hot deformed A356 alloy. Furthermore, with increasing the particle size and the percentage of Al2O3 nano particles, wear rate will decrease. The results also revealed that the optimal results was achieved at the nano - composites containing 20nm Al2O3 particles after hot deformation with 40%. SEM studies of the worn surface of nano composites showed that the main wear mechanism was oxidative in conjunction with metallic wear.

خواص الطلاء الكهربائي للفولاذ واطئ الكاربون باستخدام الزنك والالومينا النانوية كمادة مركبة للطلاء == Characterization Of Electroplating Of Low Carbon Steel Using Zn-Nano Sized Al2O3 As Composite Coatings

Author name: لبنى منير هادي تاج الدين
Supervisor name: كاظم فنطيل السلطاني
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Babylon
Language: English
University location: Babylon
First pages:

تاثير اضاقة الكرافيت على الخواص الميكانيكة و التشغيلية لسبيكة الالمنيوم برونز == Graphite Effects On Mechanical And Machining Properties Of Aluminum Bronze

Author name: هالة حازم عبد الحق القيسي
Supervisor name: حيدر عبد الحسن العذاري | علي هوبي حليم
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Babylon
Language: English
University location: Babylon
First pages:

تاثير المعاملات الحرارية وعناصر السبك (الفضه،الكادميوم) على خواص سبيكة المنيوم-نحاس-مغنيسيوم == Effect Of Heat Treatments And Alloying Elements (Ag,Cd) On Properties Of (Al - Cu - Mg) Alloy

Author name: احلام حامد جاسم حمادي
Supervisor name: جاسم محمد سلمان المرشدي
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Babylon
Language: English
University location: Babylon
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دراسة مقارنه سلوك التاكل لحديد الصب المطيلي والرمادي == Comparative Studies On Corrosion Behavior Of Ductile And Gray Cast Irons

Author name: صفاء محمد حسوني
Supervisor name: سامي ابو النون عجيل
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Technology - Al-Rasheed College of Engineering and Science
Language: English
University location: Baghdad
First pages:

دراسة تاثير عملية النتردة على مقاومة الكلال لفولاذ سبائكي

Author name: يسرى توما مروكي العمران
Supervisor name: امين دواي التميمي | حسين جاسم العلكاوي
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Technology
Language: Arabic
University location: Baghdad
First pages:

دراسة تاثير ظهور بنية ودمانشتاتن على خواص الملحومات المنجزة بطريقة القوس الكهربائي المغمور == Effect Of Widmansttaten Structure On Properties Of Submerged Arc Welding (SAW) Weldments

Author name: عمر اثير مجبل السامرائي
Supervisor name: امين دواي ثامر التميمي
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

سلوك وصلات اللحام المختلفه لسبيكة المنيوم( 6061 ) في الاوساط التاكليه == Behavior Of Different Welded Joints For Al - Alloy (6061 - T6) In Erosive - Corrosive Environments

Author name: حسن هادي عبد
Supervisor name: منى خضیر عباس
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

دراسة بعض العوامل المؤثرة على عملية الانودة == Study of Factors Influenced The Anodizing Process

Author name: عادل محمد جابر
Supervisor name: محمد جاسم كاظم
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Technology
Language: Arabic
University location: Baghdad
First pages:

دراسة تاثير المعاملة الميكانيكية الحرارية على خواص سبائك الالمنيوم مغنسيوم == The Study of The effect of Thermomechanichal Treatment on property ofAluminium Magnisum Alloys

Author name: محمد هادي علي
Supervisor name: امين دواي ثامر
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Technology
Language: Arabic
University location: Baghdad
First pages:

البنية المجهرية و مقاومة التاكل لسبائك النحاس- نيكل المسبوكة للتطبيقات البحرية و اللابحرية == The Microstructure And Corrosion Resistance Of Cast Cupronickel Alloys For Naval And Non - Naval Applications

Author name: علي سبع حمود
Supervisor name: محمد جاسم كاظم
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:

تحسين اداء عملية التثقيب العميق للفولاذ الكاربوني == Improving the Performance of Deep Hole Drilling Operation for Carbon Steel

Author name: مناف اكرم يحيى الوتار
Supervisor name: محمد جواد التورنجي | تحسين فاضل العاني
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Technology
Language: Arabic
University location: Baghdad
First pages:

Manufacturing And Characterization Of Advanced Alumina - Zirconia Fiber Ceramics

Author name: شاكر جاهل ادريس المهنى
Supervisor name: Fadhel A. Chyad | Mohammed Jasim Kadhim
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:

سلوك التاكل لانبوب نانوي من اوكسيد التيتانيوم المستخدم في مواد الزوارع الجراحية == Corrosion Behavior Of Anodized Titanium Nanotube Used In Implant Materials

Author name: زمن كرم مخيلف
Supervisor name: سامي ابوالنون عجيل | عبد الكريم محمد علي
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

Factors Affecting The Enamel Protection Of Steel

Author name: ابتهال عبد الرزاق النعيمي
Supervisor name: Sabah S. Abdul Noor | Ghazi Kamal Sa’eed
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:

Laser Processing Of Advanced Ceramic Coatings

Author name: عادل خليل محمود العزاوي
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:

تاثير المعاملات الحرارية على البنية المجهرية وتاكل ( المنيوم - نحاس) (المنيوم – نحاس- مغنيسيوم ) == Effect Of Heat Treatments On Microstracture &Corrosion Of (Al - 4%Cu) & (Al - 4.1%Cu - 0.9%Mg)

Author name: سهيلة نوري غريب قرياغدي
Supervisor name: منى خضير عباس
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

المعاملات الحرارية للمصبوبات والمطروقات الفولاذية نوع 30 Cr Mo V9 == The Heat Treatment for Ingot and Forged Steel Type(30Cr Mo V9 )

Author name: عباس شياع علوان الربيعي
Supervisor name: امين دواي ثامر التميمي
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Technology
Language: Arabic
University location: Baghdad
First pages:

دراسة المسامية في البراص المنزوع الخارصين == A Study On Porosity In Dezincification Of Brass

Author name: اسراء عبد القادر عزيز
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:

التركيب المجهري والية الترابط لوصلة لحام سيراميك / سيراميك باستخدام انظمة المونة الفعالة == Microstructural And Bonding Mechanisms Of Actively Brazed Advanced Ceramic / Ceramic Systems

Author name: فاضل عباس هاشم
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:

دراسة استخدام مركب لاعضوي (ليثيوم - المنيوم هيدرايد) في انتاج وخواص سبائك الالمنيوم - ليثيوم == Study of using inorganic compound (Lithium-Aluminum Hydride) for production and properties of (Aluminum-Lithium) alloys

Author name: سرى عبد الزهرة محسن الفتلاوي
Supervisor name: عبد الواحد كاظم راجح البكري | جليل كريم احمد الخفاجي
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Babylon
Language: Arabic
University location: Babylon
First pages:

الحمايه الكاثودية لخطوط الانابيب الفولاذية باستخدام الطاقة الشمسية == Cathodic Protection Of Steel Pipelines Using Solar Energy

Author name: ناصر كردي زيدان
Supervisor name: سامي ابراهيم جعفر
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

امثلية نظام الحماية من التاكل لشبكة من الركائزالكونكريتية في ميناء الزبير == Optimal Piling Network Corrosion Protection System For Al - Zubair Harbor

Author name: رؤى عبد الكريم سلمان
Supervisor name: وسام كاظم حمدان
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:
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