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Articles 1 - 30 of 146
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A Strategy For Achieving Sustainable Urban Development In Coastal Informal Areas Through A Participatory Approach., Reem Elnady, Alaa El-Eashy, Asmaa El Badrawy
A Strategy For Achieving Sustainable Urban Development In Coastal Informal Areas Through A Participatory Approach., Reem Elnady, Alaa El-Eashy, Asmaa El Badrawy
Mansoura Engineering Journal
Coastal areas have highly productive economic values for its residents, with huge potentials in fisheries and marine resources. The human factor with social capitals is vital potential in these coastal areas. The inhabitants work on fishing activities, intermediary traders, and other coastal related businesses. However, some of these areas are characterized with unplanned areas, poor livelihood, deteriorated buildings, with no green or public spaces. Moreover, these areas also suffer due to its far locations from cities’ centers and their eliminating from the urban development plans. In general, these problems have transformed them into coastal informal areas. Previous studies proved that …
An Overview In Protection Coordination Methods For Mitigation Dgs Penetration In Distribution System., Adel Amer, Eid Abdelbaki Gouda, Akram Elmitwally
An Overview In Protection Coordination Methods For Mitigation Dgs Penetration In Distribution System., Adel Amer, Eid Abdelbaki Gouda, Akram Elmitwally
Mansoura Engineering Journal
This paper introduces an overview for the benefits of distributed generations (DGs) in many aspects related to reliability of distribution system. Also, introduce the issues developed in protection system regarding the penetration of (DGs) in distribution system. A review is introduced of different scenarios of coordination between the common protection devices such as overcurrent relays, fuses, reclosers in distribution system. Furthermore, a review of protection coordination scenarios that developed to mitigate the DGs penetration that divided into two scenarios, one of them with minimum change in protection system such as disconnect DG from network when fault happen, limits DG output …
The Effect Of The Rate Of Strain On The Thermal And Mechanical Properties Of Al- 6030 Processed By Ecap., Maher Mohamed, Nader Nabil Zaafarani, A. E. Kabeel
The Effect Of The Rate Of Strain On The Thermal And Mechanical Properties Of Al- 6030 Processed By Ecap., Maher Mohamed, Nader Nabil Zaafarani, A. E. Kabeel
Mansoura Engineering Journal
The function of severe plastic deformation (SPD) rate during equal-channel angular pressing (ECAP) on the thermal and mechanical characteristics of the aluminum alloy 6030 are experimentally investigated. ECAP was carried out at room temperature onto refining grain size for Al- 6030 of square cross-section specimens. The tests show that, for decreasing the rate of strain from 0.016 to 0.0023 s-1, the improvement in the hardness increases gradually until the highest value is reached at the rate of strain 0.004 s-1and decreases after that gradually. The percentage improvement in the hardness is around 68 % at the rate of strain 0.004 …
Simulation Of A Digital Overcurrent Relay Using Simulink., S. El Safty, H. El-Desouki, M. El Gelil
Simulation Of A Digital Overcurrent Relay Using Simulink., S. El Safty, H. El-Desouki, M. El Gelil
Mansoura Engineering Journal
This paper presents the simulation of digital overcurrent relay through the graphic interface SIMULINK which is one of the MATLAB toolboxes. The operating characteristics of SIEMENS inverse time overcurrent relay module was used as actual characteristics of the digital relay. The technique used is based on integrating the modeling of a loaded synchronous generator together with its digital overcurrent relay. The purpose of the paper is to provide a complete structure of the digital relay in order to check its performance. Various elements of the digital relay are implemented as single modules to represent the actual system. The computer digital …
The Evaluation Of Natural Ventilation Inside Residential Building Spaces In New Assiut City-(At Under Heated Period) - Egypt., Ezzat Morghany, Abdel-Monteleb Aly, Riyad El Shemeiri
The Evaluation Of Natural Ventilation Inside Residential Building Spaces In New Assiut City-(At Under Heated Period) - Egypt., Ezzat Morghany, Abdel-Monteleb Aly, Riyad El Shemeiri
Mansoura Engineering Journal
The movement of air has a great effect on architectural formation whether on the building level in terms of the shape of voids and the ventilating elements or on the level of the general planning of the whole area. controlling roads and passageways. directing housing units, and proper distribution of buildings becomes an essential factor lo provide the required natural ventilation for all buildings, Because of the absence of adequate field studies of housing gatherings in desert arias, in the Under Heated Period, the present research focuses on studying natural ventilation of Housing units in the Under Healed Period through …
A Technoeconomic Approach To Solid Waste Disposal And Handling In Dakhlia Governorate., Ibrahim Rashed, Yasser El-Hadidi
A Technoeconomic Approach To Solid Waste Disposal And Handling In Dakhlia Governorate., Ibrahim Rashed, Yasser El-Hadidi
Mansoura Engineering Journal
Due to the rapid increase of population in rural areas, specifically in Dakhlia Governorate, and the limited dwelling areas, the solid waste emanating either from stables, large animal stocks or agricultural waste causes hygienic problems, air pollution, water pollution, effects on the ecological balance and greater risk of dangerous fire. Anaerobic digestion is considered as one of the new trends in solid waste disposal. The anaerobic fermentation processes employed in/or by : 1- Industrial and municipal sewage treatment facilities. 2- Agricultural and animal biogas systems. 3- Garbage dumps/landfills. For industrial and municipal waste water treatment plants the prime objective is …
N-Line Numerical Model To Predict The Morpological Changes Around Groins Systems., Tharwat Sarhan
N-Line Numerical Model To Predict The Morpological Changes Around Groins Systems., Tharwat Sarhan
Mansoura Engineering Journal
A three-dimensional numerical model for predicting the beach evolution has been developed. A complete numerical model (SLMG2)was designed to represent most of the hydrodynamic factors affecting the problem. The N-Line model was used to simulate the sediment transport al the vicinity of groins system and to predict the shoreline morphological changes around it. The wave computations include wave refraction diffraction and breaking. The validity of the model has been confirmed by applying it to the calculation of deformation of bottom topography around groins system. The comparison between model results and field data measurements showed a good agreement and indicated the …
Lte-Advanced Optimum Relay Placement With Zero Link Overflow Using Ammcs., Ehab Abdelhay, Fayez Zaki, Sherif Kishk, Hossam El-Din Moustafa
Lte-Advanced Optimum Relay Placement With Zero Link Overflow Using Ammcs., Ehab Abdelhay, Fayez Zaki, Sherif Kishk, Hossam El-Din Moustafa
Mansoura Engineering Journal
Multi-hop Relay networks are proposed to fulfill the demanding coverage and capacity requirements for current applications in a cost efficient way. It can be used in IMT-Advanced technologies such as 3GPP LTE-Advanced. In this paper, Resource Blocks (RBs) proposed scheduling scheme is considered for zero multi-hop links overflow in Uplink LTE-Advanced. Then based on this scheduling scheme and other network assumptions the Optimum Relay Station (RS) placement in the cell was estimated using nonlinear optimization problem in order to improve LTE-A Uplink performance. The average throughput, Throughput gain, and Mean File Transfer Time (MFTT) are considered as performance measures. The …
Feature Level Fusion Of Iris And Voice., Sally Sameh, Hossam El-Din Moustafa, Fayez Zaki
Feature Level Fusion Of Iris And Voice., Sally Sameh, Hossam El-Din Moustafa, Fayez Zaki
Mansoura Engineering Journal
Biometric systems are vastly used by various organizations for different security applications. The main use of such systems is in authentication and identification applications which including computer network login, passport control, corpse identification, electronic data security, terrorist identification, Internet access. Unimodal biometric systems suffer from a lot of problems like high error rate, low performance and imposters’ attack so the demand of Multimodal biometric systems takes place. Multimodal biometric systems have several advantages over unimodal biometric systems such as non-universality, larger population coverage, lower error rates, higher performance and higher genuine acceptance rates. In this paper, a study of multimodal …
Natural Convection Heat Transfer From Vibrated Vertical Flat Plate., Haider Al Sultan, Ahmed Sultan, Hamed El-Tahan
Natural Convection Heat Transfer From Vibrated Vertical Flat Plate., Haider Al Sultan, Ahmed Sultan, Hamed El-Tahan
Mansoura Engineering Journal
Experiments were performed on natural convection heat transfer from vibrated vertical flat plate heated under constant heat flux. The working fluid used is air. The effects of modified Rayleigh number, (107≤Ra*≤1010), the vibration frequency (0≤F≤25), and the amplitude (0≤A≤7.6 mm), vibrational Reynolds number of 102≤Rev≤8*104, were studied. Over the tested range of modified Rayleigh number, it is found that the vibrated plate generally shows higher heat transfer coefficients than that of the stationary one for all values of amplitude, and frequency. It is also concluded that the heat transfer is strongly affected by the vibration frequency while it is weakly …
Thermal Performance Of Loop Thermosyphon Charged By Nanofluid For Cooling Electronic Component., Mohamed Saafan, Hamed Eltahan, Roaya Jaleel
Thermal Performance Of Loop Thermosyphon Charged By Nanofluid For Cooling Electronic Component., Mohamed Saafan, Hamed Eltahan, Roaya Jaleel
Mansoura Engineering Journal
This work presents a theoretical and experimental investigation on the thermal performance of thermosyphon for cooling high heat flux. The working fluid charged in the evaporator is pure water or Nano fluid (Al2O3+water). In theoretical model, the flow is described by continuity, momentum and energy equations. The flow is assumed laminar, steady and two dimensional with constant properties. The differential forms of governing equations are, numerically, solved using finite difference technique. According to this technique, the partial differentials are transformed to set of linear algebraic equations. These equations are solved, numerically, by Gauss-Siedel iterative method. an experimental set up is …
Tool Wear And Surface Roughness In Hard Turning Of Stainless Steel 316 Using Tungsten Carbide Tool., Ali Abdelaziz, Ahmed Elkaseer, Ahmed Nassef
Tool Wear And Surface Roughness In Hard Turning Of Stainless Steel 316 Using Tungsten Carbide Tool., Ali Abdelaziz, Ahmed Elkaseer, Ahmed Nassef
Mansoura Engineering Journal
The aim of the present study was to investigate tool wear and surface roughness generation in precision hard turning of stainless steel 316 using tungsten carbide tool. A set of turning tests were carried out under a range of cutting parameters with carbide insert tools. The data obtained from these experiments helped in analyzing and understanding the tool wear phenomena and generated surface roughness during the cutting process. These results showed an inverse relationship between the feed rate and the exhibited flank wear and crater wear over the applied range of feed rate. However, multiple wear mechanisms revealed after the …
Comparative Assessment Of Different Optimization Techniques For Turning Operations., Samar Elsanabary, Ahmed Elkaseer, Saber Abd-Rabbo, Mohamed Ali, Shabaan Abdou
Comparative Assessment Of Different Optimization Techniques For Turning Operations., Samar Elsanabary, Ahmed Elkaseer, Saber Abd-Rabbo, Mohamed Ali, Shabaan Abdou
Mansoura Engineering Journal
This paper presents a comparative study that was conducted aiming at evaluating three different optimization techniques; namely, linguistic Fuzzy Logic Control (FLC), Sequential Quadratic Programming (SQP), and the Bees Algorithm. Initially, a well-constructed deterministic model of the turning operation was utilized to feed two optimization techniques, (SQP) and the Bees Algorithm. The results were assessed and compared with those already obtained using (FLC) method that was published in the literature. The study outcomes revealed that, although The Bees Algorithm gave acceptable output, the (SQP) technique identified the optimal cutting conditions. As a result, one can argue that the (SQP) is …
Precision Comparison And Analysis Of Reflector-Less Total Station Observations., Zaki Zeidan, Ashraf Beshr, Sara Sameh
Precision Comparison And Analysis Of Reflector-Less Total Station Observations., Zaki Zeidan, Ashraf Beshr, Sara Sameh
Mansoura Engineering Journal
In order to achieve the results that meet the specifications of given project, such as setting out and monitoring the structural deformation, the knowledge of reliability and accuracy of surveying equipment is inevitable. Reflector-less total station are widely used nowadays for several applications in geodetic engineering due to its highly accurate and fast measurements. A shortcoming is that it gives less accurate measurements in some cases of observations. The point position determination using reflector-less total station is subjected to some uncertainty due to angle of observation, incidence angle of signal to the surface, distance from the instrument to the point, …
New Administrative Capital (Opportunities And Challenges) - A Comparative Study., Rasha Ibrahem
New Administrative Capital (Opportunities And Challenges) - A Comparative Study., Rasha Ibrahem
Mansoura Engineering Journal
Under the governmental policies to develop promising projects to overcome the problem of congestion and urban population growth. The government has developed and implemented several development projects; among them, is the new administrative capital, which is an expansion of urbanization. The Egyptian economy is by the growing investment opportunities offered by this new city tries to find work for Egyptian young people. In this paper a realistic analysis of the new city is carried out. The study reviews the transfer of the Egyptian capital historically. A comparative study based on word and global experience rather than an analysis of the …
Object Matching By Image Contours Using Neural Networks., A. El-Shami, H. Niemann, A. Tolba
Object Matching By Image Contours Using Neural Networks., A. El-Shami, H. Niemann, A. Tolba
Mansoura Engineering Journal
This paper deals with the implementation of 3-d object matching system. The shape of the object is identified from the image lines and curves using Hough transform, chain code and backpropagation neural networks. This is achieved by first dynamically thresholding the grey level image, then segmenting the image into its linear components with both Hough transform and chain coding. A backpropagation framework is used for classifying the image into one of possible surfaces based on the extracted vertices and line segments. To fix the number of input layer neurons, the image features are normalized. The approach is tried on a …
Investigation Of Rectangular Settling Tanks Performance In Drinking Water Treatment Plants., Mahmoud El-Eraqui, Kamal El-Nahhas, Mohamed Saad Eddin
Investigation Of Rectangular Settling Tanks Performance In Drinking Water Treatment Plants., Mahmoud El-Eraqui, Kamal El-Nahhas, Mohamed Saad Eddin
Mansoura Engineering Journal
A uniform flow field is essential to increase the efficient performance of settling tank. This enables particles to settle at a constant velocity and in less time. The existence of circulation regions reduces the sedimentation of particles and has major influence on the hydraulic condition of flow field inside the settling tanks. According to this, the existence of large circulation regions will reduce tank performance. A common approach for decreasing settling tanks problems is to use baffles at inlet which can reduce effects of the unfavorable phenomena such as short circuiting between inlet and outlet and density currents in settling …
Study Of Heat Transfer Through Radially Buffled Rotating Annulus., Mohammed Hamza, Ahmed Sultan, Ali Elbouz
Study Of Heat Transfer Through Radially Buffled Rotating Annulus., Mohammed Hamza, Ahmed Sultan, Ali Elbouz
Mansoura Engineering Journal
This paper presents an experimental study of laminar forced convection heat transfer for cold water flows through annular tube. The test section consisted of two annular spaces the inner of which for the tested cold water while the outer for the heating water flow that heated in a tank by electrical heaters. The inner tube of the annulus is rotated with rotational speeds which varied from 175 to 650 p.m. The outer tube of the annulus have a constant diameter of 54.5mm but the diameter of inner tube of the annulus is equal to 21, 26.7 and 33.5 mm so …
Abrasive Wear Of Nano-Al2o3 Particles And Cnts Strengthened 2024 Aluminum Alloy Composites Manufactured By Powder Metallurgy., Manal Ramadan
Abrasive Wear Of Nano-Al2o3 Particles And Cnts Strengthened 2024 Aluminum Alloy Composites Manufactured By Powder Metallurgy., Manal Ramadan
Mansoura Engineering Journal
Metal matrix composites reinforced by carbon nanotubes as well as the effect of Nano Al2O3 (n- Al2O3) particles and carbon nanotubes (CNTs) are very promising materials, suitable for a large number of applications. These composites consist of a metal matrix filled with Nano-particles featuring physical and mechanical properties very different from those of the matrix. The Nano-particles can improve the base material in terms of electrical properties, damping properties and mechanical strength. In this work we investigated the effect of reinforcing Al-2024 with CNTs and n- Al2O3. The Al-2024 alloy was produced by powder metallurgy. The alloy strengthened by a …
Pesticides Removal From Wastewater By Electrocoagulation Technique Using Stainless Steel (Ss-Ss) Plate Electrodes., Olfat Fadali, E. Ibrahim, T. Farrag, Ahmed Abdelbasier
Pesticides Removal From Wastewater By Electrocoagulation Technique Using Stainless Steel (Ss-Ss) Plate Electrodes., Olfat Fadali, E. Ibrahim, T. Farrag, Ahmed Abdelbasier
Mansoura Engineering Journal
Today hazardous waste management has become one of the most challenging tasks to this technological world because tons of organic pollutants including various carcinogens are being exposed without the sufficient treatment. Electrocoagulation (EC) due to some advantages over chemical coagulation is becoming a popular process to be used for treatment of organic pollutants especially when pollutants are toxic. The aim of this work is to investigate the effect of current density, reaction time, initial concentration, addition of sodium chloride and magnetic field intensity oriented in two different directions on both removal efficiency of methomyl and the energy consumption. Current density …
Comparison Of Steganographic Techniques To Embed Data In Medical Images., Shaimaa Hussein, Hossam El-Din Moustafa, Ahmed Samra
Comparison Of Steganographic Techniques To Embed Data In Medical Images., Shaimaa Hussein, Hossam El-Din Moustafa, Ahmed Samra
Mansoura Engineering Journal
Steganography is the art and science of hiding secret information in a cover media in such a way that it is not detectable to anyone, except the intended recipient knows the existence of the data. Digital images are most commonly used coverage medium in steganography because of their easy availability and popularity on internet. This work provides a comparison review to the various steganography techniques. Steganography uses two kinds of domain for hiding the data: spatial domain (time domain) and transform domain (frequency domain).Some techniques from these two domains are discussed.The performance and comparison of these techniques is measured on …
Natural Convection Heat Transfer In Partially Divided Vertical Enclosures With Adiabatic End Walls., Mohamed Shalaby, A. Shaheen, A. El-Sedeek
Natural Convection Heat Transfer In Partially Divided Vertical Enclosures With Adiabatic End Walls., Mohamed Shalaby, A. Shaheen, A. El-Sedeek
Mansoura Engineering Journal
A numerical study has been carried on natural convection, which occurs in building enclosures, with perfectly adiabatic horizontal end wails and finitely adiabatic baffles extending from the ceiling of the enclosures. The results have been obtained for the air-filled (Pr = 0.71) and for water-filled (Pr = 3.7) enclosures with isothermal hot and cold walls. The flow is considered to be two dimensional, laminar and steady. During the couse of this work Rayleigh number has a value varies between 104 to 107 and the aspect ratio of the enclosure has two values (A = 1 and 1/2), and the aperture …
Hdsl: A Hybrid Distributed Single-Packet Low-Storage Ip Traceback Framework., Magdy M. Fadel
Hdsl: A Hybrid Distributed Single-Packet Low-Storage Ip Traceback Framework., Magdy M. Fadel
Mansoura Engineering Journal
Many problems with IP protocol design facilitate the mission of the Distributed Denial of Service (DDoS) attackers. This paper proposes a new Hybrid Distributed Single-packet Low-storage (HDSL) IP traceback framework, which consists of three enhanced DDoS defense mechanisms. The first mechanism is a Deterministic Packet Marking (DPM) to compose a unique path identifier for validating network paths. The second is a low-storage space packet logging to locally log routed packets information which is used later for locating the source of even a single attacking packet. The third, pushes the aggregates of the attacking packets upstream one or more levels to …
On Variational Inequalities And Their Application To The Obstacle Problem., M. Amer
On Variational Inequalities And Their Application To The Obstacle Problem., M. Amer
Mansoura Engineering Journal
In this paper some existence results for the solution to the so called variational inequalities in real Banach space are established. Application of the established results to the obstacle problem, the prototype of many other moving and free boundary problems, is studied. We first investigate the case of an elastic string, then we extend our study in a natural way to the case of an elastic membrane stretched over a smooth obstacle.
Multi-Response Optimization Of Post-Fire Residual Properties Of High Performance Concrete., Said Zoalfakar, Mona Elsissy, Yousry Shaheen
Multi-Response Optimization Of Post-Fire Residual Properties Of High Performance Concrete., Said Zoalfakar, Mona Elsissy, Yousry Shaheen
Mansoura Engineering Journal
This paper presents the results of an extensive experimental program undertaken to optimize compressive strength, ultrasonic pulse velocity (UPV), and abrasion wear of heated high performance concrete using Taguhi method and the utility concept. The design of experiments (DOEs) was first carried out by Taguchi method using a standard L 25(35) orthogonal array of three factors with five materials parameters levels. The factors considered in this context of HPC were: fiber volume fracture, age time and post-heat temp. The prism specimens 60x60x300 mm with various volume fractions were casted, left for different age times (7 day, 28 day, and 56 …
Laboratory Evaluation Of Green Concrete Mixes Containing High Percentages Of Steel Slag Coarse Aggregate., Gamal Elgendy, Ali Elagamy, Mohamed Sherif, Sherif El-Badawy
Laboratory Evaluation Of Green Concrete Mixes Containing High Percentages Of Steel Slag Coarse Aggregate., Gamal Elgendy, Ali Elagamy, Mohamed Sherif, Sherif El-Badawy
Mansoura Engineering Journal
Sustainability in the built environment is of increasing importance, particularly in the concrete structures. Slag from iron and steel industries can be used in some cases to replace natural aggregates in construction. Steel slag aggregate is an engineered product with great potential as replacement to naturally occurring aggregates in construction projects due to its distinctive physical and chemical properties. It is a 100% recyclable material. In this research, a comprehensive laboratory evaluation of the use of steel slag as a Portland Cement Concrete (PCC) aggregate was conducted. The performance of steel slag aggregates as a construction material in comparison to …
Susceptibility Of Shallow Groundwater Aquifers To Water Logging, Case Study Al Marashda Area, West Nile Valley, Qena, Egypt., Abd El-Fattah Elsheikh, Moustafa Barseem, Wajih Sherbeni
Susceptibility Of Shallow Groundwater Aquifers To Water Logging, Case Study Al Marashda Area, West Nile Valley, Qena, Egypt., Abd El-Fattah Elsheikh, Moustafa Barseem, Wajih Sherbeni
Mansoura Engineering Journal
Attempts were carried out to delineate the areas where the aquifer is vulnerable to water logging, head drop and pollution in the new and old reclamation areas as well. All of the hydrological, geophysical and soil factors were incorporated in the DRASTIC model. Parameters included are; depth to water, net recharge, aquifer media, water salinity, thicknesses and resistivity of successive geoelectrical layers soil media, topography and impact of the vadose zone. Saturated soil hydraulic conductivity varies from 4.43 X10-4 to 243 X10-4 m/sec. Groundwater is supplied from the gravel sand saturated sediments belonging to the Quaternary aquifer. The aquifer thickness …
Atp-Based Fuzzy Logic Controller Model For Electromagnetic Transients Studies., Walaa El-Hadad, Ebrahim Badran
Atp-Based Fuzzy Logic Controller Model For Electromagnetic Transients Studies., Walaa El-Hadad, Ebrahim Badran
Mansoura Engineering Journal
Alternative Transient Program (ATP) has been steadily developed and improved in the last decades. Today, ATP Draw, a graphical framework, is available, which has improved the use of the program significantly. However, fuzzy controller is one of complex models for which a simplified model can be a very useful tool. This paper introduces a model for fuzzy logic controller in ATP for electromagnetic transients' studies of power system. The proposed model introduces a first model of fuzzy logic in ATP. This facilitates power system and fuzzy logic controller simulation in ATP without needing any other programs. The proposed model is …
Fusion Of Multi-Focus Color Images Based On Wavelet Transform And Curvelet Transform., Hossam El-Din Moustafa, Yasmeen Abd El-Ghany
Fusion Of Multi-Focus Color Images Based On Wavelet Transform And Curvelet Transform., Hossam El-Din Moustafa, Yasmeen Abd El-Ghany
Mansoura Engineering Journal
Curvelet transform is a recently-developed multi-scale transform, which is more suitable for objects with curves. Applications of the Curvelet transform have increased rapidly in the field of image fusion. Image fusion means the combination of two images into a single image that has the maximum information content without producing details that are non-existent in the given images. In the present work an algorithm for multi-focus color image fusion based on the Curvelet transform is implemented, analyzed, and compared with a Wavelet-based fusion algorithm. Two models for color image fusion are presented. The first is based on the RGB components of …
Effect Of Ultrasonic Treatment On The Microstructure And Mechanical Properties Of Hypereutectic Al-Si Alloy (A392)., Tawfik Elmidany, Mohamed Waly, Mohamed Moussa, Yasser Essa
Effect Of Ultrasonic Treatment On The Microstructure And Mechanical Properties Of Hypereutectic Al-Si Alloy (A392)., Tawfik Elmidany, Mohamed Waly, Mohamed Moussa, Yasser Essa
Mansoura Engineering Journal
Hypereutectic Al–Si alloy (A392) was treated with ultrasonic vibration (UV) induced to the melt through a cylindrical resin–bonded sand mold. This work aims at studying the influence of UV at the different pouring temperatures of A392 alloy during solidification process on the microstructures and mechanical properties. The microstructures of as-cast samples were examined by using optical microscopy (OM) and scanning electron microscopy (SEM). The mechanical properties were investigated by tensile and hardness tests. The results showed clearly that with applied UV at optimum pouring temperature (640 oC), nearly fine uniform and polyhedral shape of the primary Si were obtained. Improvement …