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Fig. 1 shows alloy Al-1 gives more noble value of OCP, alloy Al-3 recorded more active value of OCP, while alloy Al-2 shows value of OCP between those of alloy Al-1 and alloy Al-2.
After polarization process, the corrosion potential (ECorr) of Al-1 is found to be more positive than those of Al-2 and Al-3, while that of Al-2 is slightly electropositive than that of Al-3.
Capacitance value of Al-3 alloy is much higher than Al-2 and Al-1, implies that more corroding area on the Al-3 alloy surface.
The corrosion resistances of Al-Zn alloy in natural chloride solution decrease with the following order: Al-1 > Al-2 > Al-3.
El-Mahdy, A.

Experimentally, in the case of no phase separation, Makino et al.[2] reported the maximum Mg composition concentration(x) in MgxZn1-xO ternary alloys grown by pulsed-laser deposition is 0.33 while the Takagi et al.[3] reported that the available maximum magnesium composition concentration in the single-phase wurtzite MgxZn1-xO ternary alloys is up to 0.51.
Experimentally, in the case of no phase separation, Makino et al.[2] reported the maximum Mg composition concentration(x) in MgxZn1-xO ternary alloys grown by pulsed-laser deposition is 0.33 while Ohtomo et al.[11] have reported a solid solubility of 0.35 of MgO in ZnO in pulsed laser deposited thin films, Thin films with x up to 0.20 exhibited a preferred c-axis orientation, whereas for x>0.20, the patterns were similar to that of bulk ZnO.[12] Tanaka et al.[1] have proposed the use of a high-quality ZnO buffer layer to firmly fix the crystal structure of the layer successively grown on it to wurtzite and, as a result, the growth of single-phase wurtzite MgxZn1−xO with magnesium content x of as high as 0.51 with band-gap energy of 4.45 eV has been reported.[3] These results are all in the region we calculated as shown in Figure 2.
Lett., 69,2701(1996) [6] Takayama T., Masaaki, Kunio I., et al., Jr., J.
El Haj Hassan, Computational Materials Science 40 (2007) 66–72 [9] Karpov S.

Hwang et al.[1], De la Llera et al.[2] and Samali et al.[3] conducted shaking table tests of a asymmetric base-isolated structure.
Ryan et al.[4], Tena-Colunga et al.[5] and Wu et al.[6] calculated the seismic response of a asymmetric base-isolated structure.
(cm/s2) X direction Y direction El-Centro Imperial Valley, 18 May 1940 341.7 210.1 Taft Kern County, 21 July 1952 152.7 175.9 Pacoima San Fernando, 9 February 1971 -1147.6 1054.5 Kobe Kobe, 17 January 1995 -833.7 172.9 Seismic Response In the following paragraph, and represent the maximum horizontal acceleration of the superstructure; represents the maximum rotational acceleration of the superstructure; and represent the maximum horizontal displacements of the story at the mass center of the floor of the superstructure; represents the maximum rotational displacement of the story at the mass center of the floor of the superstructure; and represent the maximum horizontal displacements of the story at the corner of the floor of the superstructure, represents the maximum displacement of the bearing at the mass center of the base floor in any direction under bilateral excitations; represents the maximum rotational displacement at the mass center of the base floor; and represents the

Lasheen et al. [25] treated orange peel by HNO3 to remove Cd(II), Pb(II),Cu(II).
Bo Zhu et al. [31] noted the adsorption capacity of citric acid modified soybean straw.
Boussaoudb, M.EL.
El-Shafey: J.
Boussaoudb, M.EL.

Dmfiletzoglou et al.have studied the analytic expressions for the inelastic scattering and energy loss of electron and proton beams in carbon nanotubes. [8] Recently, the surface plasmon-polariton modes of metallic single-walled carbon nanotube are studied by Moradi [9] and the dynamic polarization of graphene by external correlated charges is considered by Radovic el al. [10].
Garcia-Molina et. al..
Golden et. al..
Garcia-Molina et. al.
[11] Thomas stockli, Jean-Marc Bonard, Andre Chatelain et al..

Zhang et al. [6] studied the homogenization treatment process of 2055 (Al-1.0Li-3.6Cu-0.4Mg-0.3Ag-0.4Zn-0.1Zr-0.1Mn) aluminum-lithium alloy, and show that the suitable homogenization treatment regime is 470 oC / 8 h+530-535 oC/22-24 h.
The effects of Er and Sc on the microstructure and mechanical properties of Al-3.4Cu-0.8Li-0.6Zn aluminum alloy were studied by Li and Jiang et al. [7].
Balducci et al. [9] found that 2055 aluminum-lithium alloy still has good strength at working temperature up to 305 oC.
Rioja, Fabrication methods to manufacture isotropic Al-Li alloys and products for space and aerospace applications, Mater.
El-Gizawy, R.

Badawia Faculty of Science, Physics Department, El-Minia University, Egypt aemadbadawi@yahoo.com Keywords: 2024 Aluminum Alloy, Electrical Properties, Hardness, Heat Treatment, Mechanical Alloying, Positron Lifetime Technique Abstract Heat treatments for different aging times were performed on 2024 aluminum alloy.
The effect on the positron lifetime, electrical and mechanical properties of the 2024 (Al-Cu-Mg) alloy was studied.
The objective of this research work was to study the effect of aging time and temperature on mechanical, electrical properties and positron lifetime of 2024 Al-alloy.
The detected positron lifetimes, corresponding to trapping to precipitations, are significantly above the bulk lifetime of the undisturbed Al matrix.
References [1] http://www.metalwebnews.com/ [2] Hardening of an Al-Cu-Mg alloy containing type I and II S phase precipitates, by T S Parel, S C Wang, M J Starink, 2011 [3] M.

Werner-Spatz et. al. [11]) Gad-el Haq [1] stipulates that the science of flow control originated with Prandtl [2], who by introducing the boundary-layer theory made a breakthrough in the science of fluid mechanics and elucidated the physics of the separation phenomena and the description of boundary layer control.
In the initial stage, de la Montanya et al. examined two dimensional flows to better understand the blowing effect.
CFD simulation of the lift coefficient CL versus Coănda -jet momentum coefficient Cµ by De la Montanya et al. [20] and Harvell et al. [21] confirmed such notion, although there was a little difference in the jet slot place and shape of the airfoils, as exhibited in Figure 4.
GAD-EL-HAK, FLOW CONTROL: PASSIVE, ACTIVE, AND REACTIVE FLOW MANAGEMENT: CAMBRIDGE UNIVERSITY PRESS, 2007
Gad-el-Hak, Appl.Mech.Rev.

Abdelghany et al. [6] studied the hot compression behavior for a new cost-effective nonequiatomic Al8Cr12Mn25Fe35Ni20 HEA (designated as Fe-HEA).
Although the Fe-HEA was indexed to have a single FCC structure, the study indicates that Al-Ni-rich B2 precipitates at the dynamic recrystallized grain boundaries.
Won et al. [7] investigated the edge-cracking behavior associated with the hot rolling of the equiatomic CoCrFeMnNi HEA for temperatures range from 773 to 1273 K.
The precipitates are found at the HAGB, where the same phenomena were previously reported by Abdelghany et al. [6] and were verified to be Al-Ni-rich B2 precipitates.
El-Hofy, A.

The tensile properties are summarized in Table 1 namely, 0.2% yield stress (YS), ultimate tensile stress (UTS), elongation (EL) and reduction of area (RA).
T [ºC] YS [MPa] UTS [MPa] EL [%] RA [%] 500 521 638 30 73.6 Results and discussion Representative creep curves of Ti-6Al-4V are displayed in Figure 1 in air and nitrogen atmospheres in coated and uncoated samples at 520 MPa.
Analyzed Surfaces Elements Ceramic Coating [wt %] Metallic Coating [wt %] Substrate [wt %] O 16.06 1.40 2.08 Al 0.17 6.61 5.04 Ti 6.89 6.30 83.67 V 0.32 0.24 4.74 Cr 0.71 19.34 0.49 Co 1.37 32.86 1.08 Ni 1.27 29.07 0.91 Y 5.34 0.65 0.06 Zr 67.87 3.55 1.94 Conclusions The creep properties of Ti-6Al-4V alloy in air in ceramic and metallic coating samples at 500°C.