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Age Hardening and Accompanying Transformations of the Al-Ag and Al-Cu-Mg Supersaturated Solid Solutions by F.Lourdjanea, Z.Chaiebb, A.Rahoc, M.Kadi-Hanifid Laboratoire ‘Solutions solides’, Faculté de Physique, USTHB, BP 32 El-Alia, Babezzouar, Alger, Algérie aLourdjane_Faiza@yahoo.fr, b hamzazoubir@yahoo.fr, c raho_azzeddine@yahoo.fr, d mkadihanifi@yahoo.fr Keywords: GP zones, GPB zones, precipitation, metastable phase, hardness isotherm, hardness isochronal.
The development of the transition metastable phases and the accompanying hardening of these transformations are studied for Al-20wt%Ag and Al-3wt%Cu-1wt%Mg supersaturated solid solutions.
Experimental methods The samples Al-20wt%Ag and Al-3wt%Cu-1wt%Mg were prepared by melting pure elements (purity 99.99%) in vacuum at 10-4 torr, homogenizing at 520°C and water quenching (23°C).

Al-Othman, P.
Al-Othman, Y.
Al-Othman, P.
El Sayed, M.
El-Sakhawy, M.A.

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The main way to reduce Mo content of fire-resistant steel is that by adding multiple of alloy elements (Cu, Nb, V, Ni, Ti, Al, B, RE, and so on).
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El-Shazly1,3,b, M.F.
El-Kady1,4,c, Abdallah Y.M.
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Mirzaei et al., “Electrochemical oxidation of urea on nickel-rhodium nanoparticles/carbon composites,” Electrochim.
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Figure 9(b) shows the EL spectra of the prepared near-infrared LED under different forward driving voltages, and the EL emission intensity increases with the increase of driving voltage.
[2] WANG Y, GUI Q F, WANG P, et al.
[3] GAO Z R, LYU P, XU C F, et al.
[4] FANG C, YANG J k, ZHOU G J, et al.
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The Gap elements are located at elevations: EL.10.50m, EL.4.50m, EL.-12.50m, EL.-31.50m, EL.-51.50m and EL.-68.05m.
[3] YANG Shu geng , TENG Ming2qing , MENG Zhaoying , et al.

a) Consolidation pressure 50 kPa, El Centro Amplitude 0.2 g b) Consolidation pressure 100 kPa, El Centro Amplitude 0.2 g c) Consolidation pressure 50 kPa, El Centro Amplitude 0.3 g d) Consolidation pressure 100 kPa, El Centro Amplitude 0.3 g e) Consolidation pressure 50 kPa, El Centro Amplitude 0.4 g f) Consolidation pressure 100 kPa, El Centro Amplitude 0.4 g Figure 4.
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Ultrasonic-Assisted Milling of Hard-to-Cut Materials: Development and a Framework for Further Investigations Yasmine El-Taybany1,a, Mohab Hossam1,2,b, and Hassan El-Hofy1,c 1 Department of Industrial Engineering and Systems Management, School of Innovative Design Engineering, Egypt-Japan University of Science and Technology, P.O.
Jian Hua et al. [12] compared the effect of superimposing ultrasonic vibration during micro end grinding (UAMEG) and conventional micro end grinding of silica glass.
Cong et al. [16] applied UAM for drilling Carbon fiber reinforced plastic composites and reported higher cutting temperatures at higher ultrasonic power and feed rate.
Ding et al. [6] reported that, in comparison to CM, the application of UAM during face milling of SiC leads to a significant reduction of grinding forces.
In a further work, Cong et al. [20] used cutting fluid and cold air for carbon fiber-reinforced plastic using metal-bonded diamond core drills.

Compressed Thin-Walled Cold-Formed Steel Members with Closed Cross-Sections Mohamad Al Ali1,a* 1 Technical University of Košice, Faculty of Civil Engineering, Vysokoškolská 4, Košice, Slovakia a mohamad.alali@tuke.sk Keywords: thin-walled profiles, cold-formed profiles, initial imperfections, experimental research Abstract.
Table 4 Theoretical and experimental limit loads; cross-sectional group B Member Npl,STN Npl,EN Nul,el,STN Nul,el,EN Nu,y,STN Nu,y,EN Nu,z,STN Nu,z,EN Nu,exp [kN] B11 257.27 254.62 217.26 187.42 217.26 187.42 217.26 187.42 159.45 B12 258.02 255.36 217.45 187.51 217.45 187.51 217.45 187.51 165.83 B13 258.19 255.55 216.69 186.66 216.69 186.66 216.69 186.66 158.39 B21 312.08 309.40 229.30 194.45 229.30 194.45 229.30 194.45 171.15 B22 309.28 306.62 226.30 191.76 226.30 191.76 226.30 191.76 173.27 B23 316.63 313.93 234.79 200.55 234.79 200.55 234.79 200.55 164.77 B31 355.59 352.96 234.82 201.00 234.82 201.00 234.82 201.00 195.59 B32 356.61 353.97 235.94 201.98 235.94 201.98 235.94 201.98 184.97 B33 363.52 360.86 243.57 208.89 243.57 208.89 243.57 208.89 204.10 Fig. 4 Test members of cross-sectional group B; comparison of limit loads Conclusion Ø From Table 4 and Figure 4 it is evident that the theoretical limit loads, calculated according to the relevant standards are different.
Al Ali et al.: Analysis of the resistance of thin-walled cold-formed compressed steel members with closed cross-sections, Part 1: Magazine of Civil Engineering, No 5/2013, p. 38-43
Al Ali, M.