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Al-Ti-B-Sr-RE master alloys were prepared firstly by the reaction of complex halide salts with molten aluminum at 800oC, and then the addition of Al-RE and Al-Sr master alloys into the melt.
Combined grain refining and modification of conventional and rheo-cast A356 Al–Si alloy could be made it by addition of Al-5Ti-B and Al-10Sr master alloy [6, 7].
Nominal The reality composition in the master alloys Al Ti B La Ce Sr Fe 5# Al-5Ti-1B-5RE Bal. 4.85 0.96 2.99 0.31 / 1.15 6# Al-1Ti-3B-5RE Bal. 0.58 1.74 1.79 0.16 / 2.50 7# Al-5Ti-1B-3Sr Bal. 4.37 0.82 / / 0.98 1.37 8# Al-1Ti-3B-3Sr Bal. 1.11 3.01 / / 0.61 0.66 9# Al-5Ti-1B-5RE-3Sr Bal. 4.71 0.92 1.69 0.17 2.06 1.36 10# Al-1Ti-3B-5RE-3Sr Bal. 0.47 1.51 1.67 0.17 1.40 3.73 Results and discussion Fig. 1 presents the XRD spectra pattern of all Al-Ti-B based master alloys.
Fig.1 XRD spectra of different Al-Ti-B master alloys a) Al-5Ti-B based alloys; b)Al-Ti-3B based alloys The high melt temperature phase TiB2 ( Tm 2980℃) is much stabler than TiAl3 phase and AlB2 phase.
El Sebaie, A.

In this paper, Mg/Al hydrotalcite (Mg/Al HT) was functionalized with ascorbic acid (Mg/Al HT-AA) and applied to adsorb and reduce Au3+ to Au0.
Mg/Al Hydrotalcite (Mg/Al HT) was prepared by the coprecipitation method [10].
El-Sayed, M.A.
El-Sayed, Noble Metals on the Nanoscale: Optical and Photothermal Properties and Some Applications in Imaging, Sensing, Biology, and Medicine, Acc.
El-Gendy, C.J.

Jiang et al [9] have studied the cold compression behavior of Al 2124 reinforced with 20 wt% particulate SiC prepared by powder metallurgy route, stated that localized shear flow of the matrix may control the failure of the composite under compression.
It indicates that the presence of Al, TiC and Al3Ti peaks in the samples and no other noticeable diffraction peaks appear.
El-Mahallawy and Ahmed M.
El-Sabbagh: J.
[13] Abdel-Rahman M and El-Sheikh MN: J.

P, et al.
L, el al.
F, el al.
F, el al.
C, el al.

In particular, passive energy dissipation mechanisms, such as friction damper, metallic damper, fluid viscous damper et al, have been applied in many countries and regions of buildings.
Zhou et al [4] proposed a practical design method for reinforced concrete structures with viscous dampers.
Fig. 1 Finite element model of frame-shear wall According to the code for seismic design of buildings, the El Centro ground motion record is selected in the numerical analysis.
The time history of El Centro ground motion is shown in Figure 2.
Fig. 2 Earthquake record Fig. 3 Maximum inter story drift ratio without dampers Figure 4 shows the maximum inter- story drifts and shear forces of the structure with fluid viscous dampers under El Centro earthquake.

Al-Rajhi, E.M.
El-Sheikh, M.S.
El-Assar, A.Y.
El-Sersy, E.A.
[41] Mahmoud, Ahmed S., et al.

References [1] El-Sayed, M.
[4] Moussa, M.N.H., El-Far, A.A., El-Shafei, A.A. (2007), Materials Chemistry and Physics, No. 105, p 105
[7] Xu, Q-J, Zhou G-D., Lu, Z., et al., (2001), Acta Chimica sinica, Vol.59 No. 6, p 950
[8] Xu, Q-J, Zhou G-D., Lu, Z., et al., (2000), Acta Chimica sinica, Vol.58 No. 9, p 1079
[9] Xu, Q-J, Zhou, G-D, Wang, H-F., et al., (2006), Electrochemistry, Vol.12 No. 1, p 65

Gopal et al. reported that overall friction and wear performance of glass and steel fiber composites got improved with the hybridization of Kevlar [37].
El-Tayeb: J.
El-Tayeb:Wear Vol. 265 (2008), P. 223 [17] U.K.
El-Tayeb: Surface Review and Letters Vol. 14 (2007), p. 1095 [19] J.
El-Tayeb, B.F.

El-Hofy1,a , M.
Abdel Aziz3,d 1 Physics department, Faculty of Science, Menoufia University, Shebin El-Koom, Egypt 2 Geology department, Faculty of Science, Menoufia University, Shebin El-Koom, Egypt 3 Ultrasonic department, National Institute for Standards NIS, El Haram, Giza, Egypt a elhofy2000@yahoo.com, b dawoud_99@yahoo.com, c Elkhatib@yahoo.com, d ahmed.mohsen@nis.sci.eg Keyword: ZnO, Red Sea Egyptian Clay, J-E, C-V, XRD, SEM, EDAX, nonlinear resistors Abstract.
El-Hofy, Defect and Diffusion Forum 242-244 (2005) 107-114. [4] S.

These parameters were determined according to the analysis methods recommended by the AFNOR standards [14] and by Rodier et al. [15].
[11] El Hmaidi A., Talhaoui A., Manssouri I., Jaddi H., Ousmana H. (2020).
[18] El Alaoui M. and Ben-Azza H. (2017).
[29] Berrada, M., El Hmaidi, A., Monyr, N., Abrid, D., Abdallaoui, A., Essahlaoui, A., & El Ouali, A.
El. (2016).