Search results

Six kinds of Al-Zn-Mg-Cu alloys, modified with nickel and zirconium, have been produced by rapid solidification using spray deposition(the Osprey process).
Experimental Procedures Six kinds of Al-Zn-Mg-Cu-Zr-Ni based alloys, with the content of Zn as high as 8~12%, are produced by spray forming(the Osprey process) in Ningbo Branch of China Academy of Ordnance Scienc.
Tensile properties for alloys at room-temperature(MPa)(Pct) EXTRUSION RATIO λ1=3 λ2=7 λ3=16 λ4=25 UTS YS EL UTS YS EL UTS YS EL UTS YS EL 1 690 682 9.6 725 720 13.0 738 730 8.6 2 745 738 6.3 800 792 5.6 3 785 774 4.8 4 756 748 4.6 820 812 5.4 825 813 6.0 5 804 795 5.8 828 815 8.5 832 822 7.5 6 775 771 1.0 795 790 2.0 810 806 2.1 The microstructure of heat treated alloys are studied by using optical microscopy(OM), differential scanning calorimetry(DSC), conventional scanning electron microscopy(SEM) along with energy dispersive X-ray spectrometry(EDS).
Al-5.6%Zr is the binary master-alloy used for No.6, Fig 5(a) is its optical micrograph.
(2) As for Al-8.2Zn-2.2Mg-2.1Cu-0.14Zr-1Ni alloy, there are Al3Ni2, Al7Cu4Ni and MgNi2 compounds obtained after heat treatment.

Hassan et al [1, 5-10], El-Axir et al [11, 12] and Klocke et al [13].
Al-Bsharat: J.
Al-Bsharat: Wear Vol. 199 (1996), p. 1 [9] A.M.
El-Axir: Int.
El-Khabeery: J.

Effect of microstructure on crack of Al-Mg-Si alloy extrusions during axial compression Keiji Morita 1, a , Shinji Yoshihara 2, b and Takashi Oka3, c 1, 2,3 14-1 Chofu Minato-machi Shimonoseki-city, Japan a ke-morita@kobelco.jp, b s-yoshihara@kobelco.jp, c t-oka@kobelco.jp Keywords: Al-Mg-Si alloy, axial compression, crack initiation, stress concentration, grain boundary Abstract Effect of microstructure on micro-cracking behavior of Al-Mg-Si alloy extrusions during axial compressive deformation was studied.
Extrusions of Al-Mg-Si alloys with two different compositions were used for the mechanical tests and microstructure observation.
Experimental Procedure Tabe1 shows two kinds of Al-Mg-Si alloys.
Fig.6 Microstructures of fracture area after tensile test. a) interrupted at El.=9.5% , b) after braked at El.=12% for No.2-PA
▼ ▲ b) a) 4.3 Stress concentration at grain boundary On the stress concentration and fracture condition in the grain boundary of Al-Mg-Si alloy, Evensen et al. had expressed with the equations (1) below [3].

Fath El-Bab 2,c and Ahmed Abd El-Moneim Abd elmoneim 1,d 1Materials Science and Engineering Department, Egypt-Japan University of Science and Technology, New Borg El-Arab, Alexandria 21934, Egypt 2Mechatronics and Robotics Department, Egypt-Japan University of Science and Technology, New Borg El-Arab, Alexandria 21934, Egypt asahour.mohammed@ejust.edu.eg, bmohamed.gamil@ejust.edu.eg, cahmed.rashad@ejust.edu.eg, dahmed.abdelmoneim@ejust.edu.eg Keywords: Graphene film synthesis; LASER reduced graphene; Flexible strain sensors; Graphene piezoresistivity; Graphene gauge factor.
Yang and et al.: Science Vol. 324 (2009), p. 1312 [5] Q.
Jia and et al.: Carbon Vol. 45 (2007), p. 1558 [9] H.W.
Kim and et al.: Nature Vol. 457 (2009), p. 706 [11] C.
El-Kady, A.

During intentional contamination step, airborne concentrations of PGMEA and EL in the FOUP were determined (cf.
Indeed, saturation levels on the ULK wafer (7E+14 and 1E+15 atC/cm² respectively for PGMEA and EL) are reached in only 2 hours from outgassed concentrations inside the FOUP estimated at ~20 ppbv and ~180 ppbv respectively for PGMEA and EL.
Shimazaki & al.
Tram & al.
Kamoshima & al.

Recently, Brüning et al
Crack growth calculation procedure A Paris-type crack growth law formulated in terms of effective ranges of the cyclic J-integral, composed of an elastic and a plastic part according to the proposal of Kumar's et al. [3] da/dn = C ⋅ (∆Jeff) m = C ⋅ (∆Jeff, el + ∆Jeff, pl) m , (1) is applied to calculate the crack growth increment per cycle, da/dn.
In general, ∆Jeff, el can be derived from the stress intensity factor ∆Keff using Eq. (2) ∆Jeff, el = (∆Keff) 2/E' = (∆Seff ⋅Yel) 2⋅π⋅a/E'
∆Jeff, pl = ∆Jeff, el⋅Ypl = ∆Jeff, el⋅ζ⋅( ∆Seff/∆Sref) 1/n'-1, (3) where n' is the material's cyclic hardening exponent and ζ and ∆Sref have been calibrated to reflect results of an extensive finite element investigation [8]. n' can be determined by fatigue tests on smooth specimens or approximated by means of the Uniform Material Law [9].
To evaluate ∆Seff in Eqs (2) and (3), an experimentally verified analytical procedure according to Savaidis et al. [10] is applied within the framework of the present crack growth model.

%Al- 4.07 wt.
%Al- 4.07 wt.
A Cu-Al-Ni alloy with eutectoid composition exhibits the same particularities of the binary Cu-Al alloy.
Experimental Procedures Polycrystalline samples of Cu-Al-Ni with a nominal composition of 84.68 wt.% Cu- 11.25 wt.% Al- 4.07 wt.% Ni have been used.
"Al-Cu (Aluminium-Copper) Binary alloy phase diagrams".

Fig. 2 illustrates the electroluminescence spectra (EL) of PFO and PFO/Fluorol 7GA LEDs under forward bias.
Nonetheless, the actual EL characteristics of the blends were rather complicated since these two competing mechanisms may occur simultaneously in the blend. 4 1 Al ITO 2 3 PFO Fluorol 7GA Fig. 3: Mechanism of charge injection (1 and 2), transport (3) and trapping (4) in the OLED device.
Al-Asbahi, M.S.
Al-Dwayyan, M.H.
Martínez, A.L.

Ohshima, et al., J.
Fuchs, et al., Sci.
Kraus, et al., Nano.
Yamazaki, et al., J.
Simin, et al., Phys.

El Hadi2,g, A.
El Hadi, A.
El Hadi, M.
El Hadi, A.
El Moussaouy, et al.