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انت تشاهد مقالات الاستاذ  نوال محمد داود الكروي
عدد المقالات والبحوث 34 هذا الاستاذ ينشر تحت فئة كلية هندسة المواد

INVESTIGATION OF OXIDATION RESISTANCE OF NI- TI ELECTROCHEMICAL CODEPOSITION COATING OF AUSTENITIC STAINLESS STEEL (316 L)  156 Views
In this study, we examine the influence of codeposition on the resulting composite morphology and the hardness of the coating and examines intermetallic phase development during heat treatment of Ni-Ti coatings. Further this work aims to gain an understanding of the oxidation behavior of Ni-Ti electrodeposited composite coatings as a function of exposure temperature and time
Wear resistance of pulsed laser deposition of hydroxyapatite on Stainless Steel 316L  153 Views
the implant, deposition of hydroxyapatite by laser surface modification has also been used to improve the microstructure, tribological, wear, corrosion and biocompatibility properties of 316L stainless steel
EVALUATION THE PERFORMANCE OF LOCAL AND FOREIGN LUBRICATING OILS  151 Views
Additives to the oil serve many functions such as providing different surface chemistry for the tribological surfaces, load capacity of the fluid, viscosity temperature, and viscosity- pressure dependence
Corrosion behavior of electro-deposited nickel aluminum composite coating on the stainless steel 316L  123 Views
The goal of current research were to manufacture nickel aluminum composite coating on the St. St.316L as well as to explore the belongings of deposition limits on aluminum particulates depositions in the coating as well as to investigate the corrosion behavior of the composite coatings comprising numerous percentage of aluminum particulates.
Fabrication of Porous NiTi Shape Memory Alloy Objects by Powder Metallurgy for Biomedical Applications  148 Views
This research aims to study of the effect of compacting pressure and the Copper additives on the mechanical properties of Ni-Ti shape memory alloys prepared by powder metallurgy.
Mechanical Properties and Characterization of Similar and Dissmilar Spot Welding Joints  155 Views
Mechanical and metallurgical properties of the FZ and HAZ changes after spot welding, so that the study of these varies is essential for the safety of welded joints strength
INVESTIGATION THE EFFECTS OF ZIRCONIUM ADDITION ON WEAR AND CORROSION BEHAVIOUR OF ALPHA-BRASS ALLOY (Cu-Zn30)  133 Views
Current work aims to study the effects of zirconium addition (0.5,0.10,0.15 and 0.20) wt % on some properties including (microstructure, hardness, corrosion resistance and wear resistance) of ( ?-brass) alloys and discuss the results.
Erosion-Corrosion Behavior of Al-20%Ni-Al2O3 Metal Matrix Composites by Stir Casting  174 Views
The current research aims to enhance both mechanical properties and resistance against corrosion of the aluminum after strengthening it with nickel and aluminum oxide by preparing specimens of aluminum-nickel-aluminum oxide composite materials in a way of manufacturing stir casting where the percentage of nickel is fixed at 20 wt.% with different weight percentages of aluminum oxide (4-6-8 wt.%). Further, the erosion-corrosion behavior of all composites in seawater (3.5% NaCl solution) and slurry solution with 1wt% SiO2 sand in seawater was investigated
The Effect of Boron Addition on The Microstructure and Corrosion Resistance of Cu-Al-Ni Shape-Memory Alloys Prepared by Powder Technology  132 Views
This research aims to evaluate the corrosion resistance and microstructures of Cu-Al-Ni SMAs with boron (B) additions (0.4%, 0.8% and 1.2% wt) in a 3.5% sodium chloride solution. This was done via powder metallurgy.
Improvement corrosion resistance of Ni-Ti alloy by TiO2 coating and hydroxyaptite/TiO2 composite coating using micro arc oxidation process  172 Views
In this work, TiO2 and HA/TiO2 were used as coating materials on NiTi alloys using MAO method for improving the alloy’s resistance against corrosion. Potentio dynamic polarization tests per formed in Ringer’s solution were used to determine the substrate’s that coated with MAO corrosion properties. Meanwhile, SEM, XRD and AFM tests were used to determine the structural properties.
Improvement of Microstructure and Wear Resistance of X12 Tool Steel by Using Laser Surface Re-Melting Technique  126 Views
This paper describes the experimental work on microstructural growth in surface modification of X12 tool steel by laser re-melting. Besides, the effect of laser re-melting wear behavior is investigated
Pomegranate Peel Plant Extract as Potential Corrosion Inhibitor for Mild Carbon Steel in a 1 M HCl Solution  153 Views
The current research is an attempt to study the inhibitory performance of a pomegranate peel extract as an inhibitor of carbon steel corrosion in 1M HCl. To evaluate the performance of this inhibitor, simple immersion tests were performed; moreover, a corrosion-erosion test and an electrical conductivity test of solutions were performed, and, finally, a microstructure test.
Investigation Corrosion and Wear Behavior of Nickel-Nano Silicon Carbide on Stainless Steel 316L  118 Views
In the current work, electrochemical potentiodynamic tests were performed to recognize the effects of coating parameters on the polarization performances of the coated layer. The electrodeposition procedure has been done by using silicon carbide nano powder as an additive to the nickel sulfate solution for the invention of the nickel/silicon carbide nano-composite coatings.
Investigation the effect of Al and Ce on microstructure, corrosion, and wear behavior of ?- brass alloy  151 Views
The influence of Cerium and Aluminum on the microstructure’s grain refinement and properties (hardness, corrosion resistance and wear resistance) of alpha brass alloy were investigated.
The role of zirconia additions on the microstructure and corrosion behavior of Ni-Cr dental alloys  123 Views
This work investigates the effect of ZrO2 addition, for three weight percentages, to Ni-Cr alloy. The ion releasing and corrosion behavior in artificial saliva are analyzed in order to discover the capacity of using the presented alloy as restorative materials.
Influence of Titanium Additions on the Corrosion Behavior of Cu-Al-Ni Shape Memory Alloys  118 Views
The main objective of this work is to examine effect of Ti particles on the corrosion behavior and phase transformation of CuAlNi SMA.
MODIFICATION OF OXIDATION BEHAVIOR OF Ni Ti SHAPE-MEMORY ALLOY BY YTTRIUM ADDITION  133 Views
In this work, NiTiY SMA was oxidized at elevated air temperature. The mechanism of oxidation and the activation energy are conversed and compared with those of binary NiTi.
The Effects of Chemical Oxidation on Corrosion Behavior of Ni-Ti Alloy  112 Views
Ti is very active element and when Nitinol is in contact with even a weak oxidizing environment with Nitinol, a very thin native passive layer predominated by titanium dioxide forms on the surface of Nitinol
Erosion- Corrosion Behavior of (Al-Y2O3) Composite Prepared by Powder Metallurgy  104 Views
The objective of the research is to investigate changes in microstructures, hardness and erosion corrosion performance in sea-water (3.5% wt NaCl solution) and slurry solution with 1wt%SiO2.
Effect of Aluminum Addition on Microstructure and Oxidation Performance of Cast Irons  109 Views
This oxide works as a protector to the alloy from some attackers. The thickness of the oxide layers of the decreased as content of aluminum increased. This study concentrates on the aluminum addition effect in the cast iron on the resulted phase and oxidation resistance beside the relationship between them.
Corrosion protection of 316L stainless steel by (PVDF/HA) composite coating using a spinning coating technique  142 Views
this work intends to investigate the potential of using a PVDF-HA nanocomposite coating on 316L SS material to enhance its protective performance against corrosion in the biological field
Corrosion Behavior of Al-Ni Matrix Composites in a dilute sodium chloride solution  112 Views
The current research aims to improve the corrosion resistance of aluminum after strengthening it with nickel and yttrium oxide by preparing specimens of aluminum-nickel- yttrium oxide composite materials in a way of manufacturing stir casting where the percentage of nickel is fixed at 20 wt.% with different weight percentages of yttrium oxide (3-6-9 wt.%)
Mechanical properties study of jute fiber reinforced polyester   552 Views
Metal Matrix Composite System
Study of some mechanical properties for aluminum reinforced by alumina fibers  586 Views
Metal Matrix Composite
Silicon carbide particles reinforced aluminum matrix composite prepared by stir-casting   581 Views
Metal Matrix Composite
Effect of chopped alumina fibers on hardness and impact strength of unsaturated polyester   592 Views
Metal Matrix Composite
Formation of Ni-Sb phases by electro codeposition diffusion coating  528 Views
co deposition diffusion coating process
Preparing and studying some mechanical properties of aluminum matrix composite materials reinforced by Al2O3 particles  562 Views
Metal Matrix Composite
Oxidation of NiAL electrodeposition composite coating of Inconel 600 alloy  592 Views
Composite Coating
Corrosion protection of 316L stainless steel by HA coating via pulsed laser deposition technique  588 Views
Corrosion protection of 316L stainless steel by HA coating via pulsed laser deposition technique
Characterization of NiTiCu porous shape memory alloys prepared by powder metallurgy (part1)  549 Views
Characterization of NiTiCu porous shape memory alloys prepared by powder metallurgy )
Wear resistance of pulsed laser deposition of hydroxyapatite on stainless steel316L  514 Views
advanced bio-materials
Effect of Cooling Rate on the Phase Transformations Behavior and Hardness of NiTi Shape Memory Alloys  654 Views
NiTi alloy is well- known shape memory alloys and has been widely used for bio-medical, mechanical and electrical applications.
Study of Some Mechanical Properties for Aluminum Reinforced by Alumina Fibers  618 Views
The aim of this research was to study the ability of improving the impact resistance and Vickers microhardness of composite material based on aluminum metal

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