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Whereas, Parthasarathy et al. [10] fabricated porous Ti6Al4V structures via EBM to investigate its mechanical performance.
Also, Feng et al. [13] investigated the mechanical performance of octahedral structures under quasi-static loading conditions.
Advanced Engineering Materials 2018;20; DOI: 10.1002/adem.201700648 [6] Gao C, Wang C, Jin H, Wang Z, Li Z, Shi C, et al.
PLOS ONE 2015;10:11; DOI: 10.1371/journal.pone.0127293 [18] Fouda N, Eltlhawy B, El-Midany T.
Bio-Medical Materials and Engineering 2004; 14:14; ISSN: 09592989 [22] Eldesouky I, Harrysson O, Marcellin-Little DJ, West H, El-Hofy H.

Matters become more complicated as a result of recent work of El-Eskandarany et al [5-8].
Sherif El-Eskandarany, K.
Sherif El-Eskandarany, K.
Sherif El-Eskandarany and A.
Sherif El-Eskandarany, K.

Experimental The chemical composition of the matrix alloy is Al-30Si alloy powder (≥99.8wt.%) with the mean size 8μm.
In the same volume fraction SiC particles reinforced Al – 30Si composites, with the increase of the SiC average size, the SiC particle quantity reduces, resulting in reducement of effects on the control of silicon precipitation and growth in the supersaturated Al-30Si alloy powder.
VSiC and VAl are volume fraction of the SiC and Al particles, respectively. λ is the extrusion ratio.
In the same volume fraction (25%) SiC particles reinforced Al-30Si composite, with the increase of the SiC average size, the SiC particle quantity reduces, resulting in reducement of effects on the control of silicon precipitation and growth in the supersaturated Al-30Si alloy powder.
References [1] RENS B，HE X.B，QU X.H: Composites Science and Technology， Vol. 67(2007), p. 2103−2113 [2] Taha M A，El-Mahallawy NA，El-Sabbagh AM: Journal of Materials Processing Technology，Vol. 202(2008), p. 380-385 [3] J.

Zhuang et al. fabricated flat sheet membranes from diverse types of waste PS for the gas separation [3].
Garcia et al. studied the application of HIPS-R flat sheet membranes in low-pressure membrane processes [2].
Ke et al., “Electrospun polystyrene nanofibrous membranes for direct contact membrane distillation,” J.
El-Shazly, M.F.
El-Shazly, M.

Optical, photoluminescence (PL) and electroluminescence (EL) properties were investigated with respect to blend systems.
Chang, et al.
Liu, et al.
Wu, et al.
Hung, et al.

Effect of Al powder content on the porosity, microstructure and phase constitution of Al-Al2O3-MgO composites were investigated.
With Al power content increasing, the porosity increased, resulting from the rising temperature and the reactions occuring along with the evaporation of Al.
Xiumin Xie el at hold that gaseous Al2O was formed and left porosity under the prevailing conditions [10].
Chen, et al., AlON: A brief history of its emergence and evolution.
Gauckler, The system Al-Mg-O-N, J Am Ceram Soc. 65 (1982) 68-69

The estimated activation energy is agreement with those reported by Su, et al. [6] (57.5 kJ/mol) and Yi-Ju, et al. [8] (56.2 kJ/mol).
El Tawil, K.A.
El Barawy, A.S.
El Hazek, T.A.
El Hazek, A.S.

The Cold Rolling Effects on the Microstructure and Micro-Hardness of Al-Mg-Si Alloy Hichem FARH1,2*, Hanna BELGHIT1, Toufik ZIAR1,2, Abdelouahab NOUA2 and Fares Serradj3 1Department of Material Sciences, Faculty of Exact Sciences, University of Tebessa 12002, Algeria 2Laboratoire des Composants actif et Matériaux, Oum el Bouaghi, Algeria 3Department of Material Sciences, Faculty of Exact Sciences, University of Guelma, Algeria KEYWORDS: AL-MG-SI ALLOYS, DEFORMATION RATIO, ARTIFICIAL AGEING, PRECIPITATION ABSTRACT.
The mechanical properties of the Al-Mg-Si alloys are mostly contributed to the metastable precipitate phases formed during artificial aging.
The chemical compositions of the alloys are given in table 1 Table 1 Chemical composition of Al-Mg-Si aluminum alloy (mass fraction, %) Mg Si Cu Fe Mn Cr Zn Ti B 0.49 0.37 0.10 0.17 0.03 0.001 0.003 0.010 0.001 The as-cast Al-Mg-Si alloy was heat treated for 5 hours at 530°C and water quenched.
This result is in good agreement with the results obtained by Wang et al. [17].
Loudjani, A.L.

El-Naggar2,b, Mervat A.
El-Gayar, H.
El-Naggar, M.
El-Shazly, S.
Al-Dahhan, W.

Table 1 Earthquakes Used for tests Earthquake names Component identifications Time interval [s] Duration [s] PGA [cm/s2] Station Names 1940 El Centro Up(z) 0.02 53 206.00 El Centro, Valley Irrigation District 1979 ARRAY Up(z) 0.01 39 1662.75 El Centro, ARRAY 6, Imp Valley 1976 Songpan wenxian Up(z) 0.01 23.19 -79.04 Wenxian Station 1976 Qian’an Luanhe bridge Up(z) 0.01 19.8 106.16 Qian’an Luanhe Bridge Test Results The fixed-base and DSB base-isolated conditions of the model ate tested using random white noises to determine their natural frequencies.
In Figure 4 the structural responses of the fixed-base (fix) model and of the DSB base-isolated model (DSB) under El Centro seismic wave are compared in terms of (a) normalized peak story accelerations for different PGA values, (b) maximum story displacements.
Figure 4 Summaries of Normalized Peak Story Acceleration and Maximum Story Displacement under El Centro Earthquake Wave The comparison of the time history of roof acceleration response between the fixed-base and DSB base-isolated structures under the El Centro earthquake of 0.4g in PGA is shown in Figure 5.
Figure 5 Roof acceleration of fixed-base (fix) and DSB base-isolated (DSB) steel structure during El Centro earthquake (z direction, PGA=0.4g) Figure 6 Isolation effect under four sets of earthquake waves Conclusions Vertical base isolation has been applied to enhance the seismic performances of three-story steel frame model.
Enomoto, et al.