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التحقق من الخواص الميكانيكية لوصلة لحام لانبوب المراجل البخارية في محطات توليد الطاقة == Investigation of the Mechanical properties of the tube boiler weld joint in the Power plants

Author name: محمد عبد الرضا كاظم الزبيدي
Supervisor name: كاظم فنطيل السلطاني
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Higher Diploma
University: University of Babylon - Faculty Of Materials Engineering - Department Of Metallurgical Engineering
Language: Arabic
University location: Babylon
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تاثير اضافة عنصر الفضة على بعض الخواص الميكانيكية لسبائك البراص == Effect of Silver Addition on Some Mechanical Properties of Brass Alloys

Author name: ايمان سليمان عبيد
Supervisor name: علي هوبي حليم
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Higher Diploma
University: University of Babylon - Faculty Of Materials Engineering - Department Of Metallurgical Engineering
Language: English
University location: Babylon
First pages:

دور السباكة تحت تاثير الاهتزاز والتعتيق اللاحق على الخواص الميكانيكية لسبيكة Al - 4%Cu == The Role of casting under vibration and Subsequent Aging on Mechanical Properties of Al - 4%Cu

Author name: رانية حسين ياسين الخفاجي
Supervisor name: حيدر العذاري
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Higher Diploma
University: University of Babylon - Faculty Of Materials Engineering - Department Of Metallurgical Engineering
Language: English
University location: Babylon
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امثلية عمليات اللحام باستخدام مصفوفة التضارب == Optimization Of Welding Processes Using Confusion Matrix

Author name: حسين خليل برهان
Supervisor name: حيدر الجبوري
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Higher Diploma
University: University of Babylon - Faculty Of Materials Engineering - Department Of Metallurgical Engineering
Language: English
University location: Babylon
First pages:
Abstract: Welding is a materials joining process in which two or more parts coalesced at their contacting surfaces by suitable application of heat and/or pressure.The proposed system consist of three stages : - First stage : preparing the actual samples from the previous research. These stage have multi tests (i.e, residual stress, fatigue life, impact energy, hardness and tensile strength) - Second stage : Translated the result of previous stage depending on speed of welding and heat input. The mechanical properties was related to the heat input and the temperature of the processes of welding. The quantity of the heat input was increased when the speed of welding was slow and heat input decrease when the speed of welding was high, this high heat input led to form coarse grain and this led to decrease the mechanical properties.Third stage : generated software system used different types of error measures, this software include two phase, the first phase is to estimate the error between the actual and predicted tests. While the second phase is to verification of the result phase on the person correlation measures, and this phase show high correlation among welding processes. In general these correlation lied from +1. The verification occur base on the measures of confusion matrix, (i.e SSE, MSE, RMSE ,MAPE, MPE and MAE ).The system satisfy the following results (Accuracy equal 84.37%, True positive (TP) equal 86.66 % and Precision equal 96.2% ).

تاثير معدل التبريد على خواص سبيكة Ag - Cu - Sn == Effects Of Cooling Rate On Roperties Of (Ag - Cu Sn) Ternary Alloy

Author name: جمان حيدر ساجت
Supervisor name: حيدر حسن جابر جمال الدين
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Higher Diploma
University: University of Babylon - Faculty Of Materials Engineering - Department Of Metallurgical Engineering
Language: English
University location: Babylon
First pages:
Abstract: Dental fillings is widely used because of good mechanical properties and low cost but also was one of the more fillings topic of discussion and it studied continuously.The objective of this research is studing the effect of the cooling rate on the phases and properties of amalgam. two alloys were prepared by two types of casting (die casting and sand casting) with fixed percentage of tin, copper, silver and zinc for both alloys respectively about (7.5gm, 6.25gm , 10.75gm , 0.5gm).The process done by using an electric furnace in an inert gas atmosphere of argon and alloys thermally treated at a temperature (400C?) for a period of four hours for the purpose of homogenization phases alloys. And then it was studying the microstructure using an optical microscope. And using X - ray diffraction to determine the phases in alloys.The phase evaluation showed that the phases in the amalgam alloy (die alloy) has ? (Ag3Sn) , ? (Cu3Sn), and one other phase ? (Cu6Sn5) and the phases in the amalgam alloy (sand alloy) has ? (Ag3Sn) and ? (Cu3Sn). Then alloys have been converted into powder using a ball mill. The powder was treated thermally output for temperature (100C?) for a period of three hours atmosphere vacuum to remove internal stresses.The amalgam manufactured according to the ADA specification No.1 where he was mixing 0.8gm from each of the mercury and the powder for 30 seconds mined device and then put the dough, resulting in the mold of Teflon and sheds them straining compression amount (14MN / m2) for a period of 85 seconds still stress after that, the sample isextracted from the mold after the half - hour and placed in a glass chamber at a temperature of 37 ± 1C?.Microstructure of the amalgams were studied primarily by x - ray diffraction, optical microscopy.The phase analysis of two amalgams shows two phases; ?1, ?.studied the mechanical properties (tensile, compression, creep, dimensional change, hardness) and the result was that all properties effected with the change of the colling rate.It was conducted two types of corrosion tests are testing the open circuit (OCP) and potentiodynamic polarization in industrial saliva solution at a temperature of 37 ± 1C?.

effect of lead content & age-hardening treatment on the tensile properties & machina-bility of al-5.5%cu alloy

Author name: inname ghaeb mahdy al-ajaj
Supervisor name: m. n. saxena
General topic: Production engineering metallurgy and materials
Specific topic: Metals Engineering
Degree: Higher Diploma
University: University of Technology - Department of Production and Metallurgy Engineering
Language: English
University location: Baghdad
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