A comprehensive practical study of typical mechanical properties of welded Aluminum alloy AA7020-T6 (Al-Mg-Zn), adopting friction stir welding (FSW) technique and conventional metal inert gas (MIG) technique, is well achieved in this work for real comparison purposes. The essences of present output findings were concentrated upon the FSW samples in respect to that MIG ones which can be summarized in the increase of the ultimate tensile strength for FSW was 340 MPa while it was 232 MPa for MIG welding, where it was for base metal 400 MPa. The minimum microhardness value for FSW was recorded at HAZ and it was 133 HV0.05 while it was 70 HV0.05 for MIG weld at the welding metal. The FSW produce 2470 N higher than MIG welding in the bending test and a decrease in the localized grain size for FSW in the stirred zone 12 µm and it was 37 µm for MIG while it was 32 µm for the base metal.
Aluminum alloy 5052 had been anodized by sulfuric acid as an electrolyte under constant voltage and the anodic oxide film produce will be testing by potentiostatic anodic polarization .Two variables, which were considered as important variables, were studied. These variables are anodizing time 15,30 min. and sealing time 10,20 min., and the test by potentiostatic anodic polarization through electro chemical polarization measurements in solutions of 1N na2so4 ( PH= 1 ). The results are discussed in light of the rate of ionic current flow through the coating during anodic polarization measurements.
The study of civil liability is one of the most important issues of interest in all jurisprudential, judicial and legislative direction, because of the problems and difficulties it requires. the solution requires a focused effort that sets its source, basis, scope, and control with extreme care and accuracy to achieve the right and enable the injured party to obtain fair compensation both with scope of the contractual or tort liability.
In fact, the contract of the maritime agency is what is called the comparative jurisprudence (the contract of the ship's agency) connecting between the terminals of the maritime carrier on the on hand and the maritime agent on the other hand. It is the source of responsibility of each party to the
... Show MoreThe research problem boils question is there in Riyadh organizational climate that enables them to do their work properly and whether there are differences between the government and private Riyadh depending on the organizational climate has sought Find measure: 1 regulatory climate for kindergarten 2. The difference between government and private Riyadh depending on the organizational climate. Limited research on the (200) parameter of the Riyadh government and private parameters for the year (20,142,015) In order to achieve the research objectives the researchers built a regulatory climate in accordance with the scientific steps to build a psychological scales measure After the formulation of climate regulation paragraphs of the (30) p
... Show MoreIn the present study, a powder mixture of elements Ti and Ni was mechanically alloyed in a high energy ball mill. Microstructure of the nanosized amorphous milled product in different stages of milling has been characterized by X- ray diffraction, scanning electron microscopy and differential thermal analysis. We found that time of mechanical alloying is more significant to convert all crystalline structure to the amorphous phase. Nanocrystalline phase was achieved as a result of the mechanical alloying process. The results also indicates that the phase transformation and the grain size occurs in these alloys are controlled by ball milling time
Criminal prescription is a legal idea that we find its applications in most laws, It means that a period of time has passed since the occurrence of the crime, which is called the prescription of the criminal case or the crime, or the lapse of a period of time since the issuance of a final judgment in the criminal case, and it is called the prescription of the penalty, the lapse of the prescribed period will result in the expiry of the criminal case in the first case, and the lapse of the penalty imposed in the second case. This system has been found since ancient times in the legislation of countries with their various legal and political systems because of its practical considerations, the most important of which is achieving legal stab
... Show MoreThis study evaluates the performance of magnetic abrasive finishing (MAF) of aluminum alloy in terms of achieving materials removal (MR). A vertical milling machine is used to perform the finishing process using a developed MAF unit that consists of an inductor made out of a 150 mm long and 20 mm diameter iron core wound with 1500 turns and 0.5 mm copper wire. The commutator and magnetic pole are attached at the top and bottom of the inductor, respectively. The required current is supplied using a DC power supply. The South Pole workpiece is a 100×50×3 mm3 plate of AA 1100 aluminum alloy, whereas the magnetic pole represented the North Pole. Pole rotational speed, applied current, and abrasive finishing time was selected as
... Show MoreAbstract Additive manufacturing has been recently emerged as an adaptable production process that can fundamentally affect traditional manufacturing in the future. Due to its manufacturing strategy, selective laser melting (SLM) is suitable for complicated configurations. Investigating the potential effects of scanning speed and laser power on the porosity, corrosion resistance and hardness of AISI 316L stainless steel produced by SLM is the goal of this work. When compared to rolled stainless steel, the improvement is noticeable. To examine the microstructure of the samples, the optical microscopy (OM), scanning electron microscopy (SEM), and EDX have been utilized. Hardness and tensile strength were us
... Show MoreIs no longer a football player looks to sport as a means of entertainment and physical development. But become see as part of The economic and is getting in return for the effort of، Through a contract with a club to organize the activity which is called a contract of professional, This contract is similar to the rest of the contracts in terms of problems and dispute that arise during the implementation or after it ends because of the nature of sports to such disputes and privacy being subject to special rules (regulations, national and international professional) required that subject to judicial bodies private mission confined settle sports disputes these entities and is affiliated unions legal committees and the court of arbitration for
... Show MoreThe immunity enjoyed by members of parliament is one of the most important guarantees for the performance of their parliamentary work, which protects them from threats or any reprisals against them.
There are two types of immunity:
Objective immunity: the member does not bear any responsibility for the opinions, ideas, and statements he expresses within the council or its committees, but even outside it by some systems.
Procedural immunity: that prevents criminal actions from being taken during or outside the session of the Council, with the approval of a body specified by the constitutions of the countries under study, but it is restricted by conditions and controls stipulated. It contains constitut
... Show MoreThe emergence of the central bank was a commercial bank the advantage of the government as if it belonged to him or the privilege of issuing banknotes. There is no comprehensive definition contrary to the concept of the central bank although everyone agrees that the central bank stands at the head of the banking system in the state and takes charge of banking and credit policy in the country.
The central bank is a governmental institution that dominates the monetary and banking system of the state it is responsible for issuing cash and acting as the financial agent of the government in addition to credit central in order to support the economic growth and monetary stability of the country and the central role of the central bank
... Show More