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Online since: July 2006
Authors: M.V. Markushev, Maxim Yu. Murashkin, Ruslan Valiev, Julia Ivanisenko
The effects of equal channel angular pressing (ECAP), further heat treatment and rolling on the structure and room temperature mechanical properties of the commercial aluminum alloys 6061 (Al-0.9Mg-0.7Si) and 1560 (Al-6.5Mg-0.6Mn) were investigated.
Fig.1 TEM microstructure of the 6061 alloy after ECAP State YS, MPа UTS, МPа El, % ECAP 386 434 11 ECAP+ ageing at 130°C, 24 h. 434 470 10 ECAP + ageing at 130ºC, 24 h. + cold rolling 15 % 475 500 8 T6 268 365 25 Table 1 Room temperature tensile properties of the 6061 alloy The DSC profiles of the alloy after quenching and further ECAP are presented in Figure 2.
The following annealing at 200ºС led to a weak grain coarsening and softening of UFG alloy, but its ductility increased by more than 1.5 times (Table 2). 200nm b a 100nm c Fig.5 TEM microstructures of the 1560 alloy after ECAP (a), further cold rolling by 20 % (b) and rolling by 90 % at 120°C (c) State YS, MPа UTS, МPа El, % ECAP 375 467 10 ECAP+ annealing 200ºC, 8 h. 320 430 16 ECAP + annealing 200ºC, 2 h. + cold rolling 20 % 432 505 6 ECAP + annealing 200ºC, 2 h. + rolling 90 % at 120ºC 540 635 4 Н 320 420 10 Table 2 Room temperature tensile properties of the 1560 alloy Fig. 4 Precipitates of the strengthening β' (Mg2Si) phase after ECAP and further aging at 130°C, 24 hs (a) and conventional treatment T6 (b).
Conclusions Comparative evaluation of the mechanical properties of the 6061 and 1560 Al alloys at room temperature after ECAP and post-ECAP processing and after conventional hardening treatments was conducted.
Online since: September 2022
Authors: Manabu Fujii, Hani Ezz, Mahmoud Nasr, Mona G. Ibrahim
According to Bhatnagar et al
El Sadek, A.
El, and S.
El-Etriby, “Synthesized nano titanium for methylene blue removal under various operational conditions,” Desalin.
El-mallah, H.
Online since: September 2018
Authors: Aslan Kh. Mazhiev, Dena Bataev, Adam Kh. Mazhiev, Minkail A. Gaziev
AN CHR, KNII RAN, Nal'chik, El-Fa, 2007, pp. 31-35
Chuah et al., Nano reinforced cement and concrete composites and new perspective from graphene oxide, Construction and Building Materials. 73 (2014) 113-124
Tolbert et al., Phase transitions in mesostructured silica/surfactant composites: Surfactant packing and the role of charge density matching, Chemistry of materials, 13(7) (2001) 2247-2256
AN CHR, KNII RAN, Nal'chik, El-Fa, 2007, pp. 35-40.
Online since: May 2004
Authors: Ke Xin Chen, Jun Ming Guo, José Maria F. Ferreira, Ren Li Fu
China), aluminium (99% pure, -300 mesh, Fushun Al Factory, P.
SEM microstructure of combustion products: (a) Ti:Al:C = 2:1:1; (b) Ti:Al:C = 3:1.5:1.
However, no Ti-Al compound could be found in the XRD patterns.
El-Raghy: Scripta Materialia Vol. 36 (1997), p.535
El-Raghy: Metall.
Online since: December 2010
Authors: Wen Bin Sun, Jian Lin Wang
Slenderness effect Theriault et al. [40] and El Echary [42] have suggested that slenderness effect will reduce nominal axial strength of FRP-confined concrete columns.
Eng., Vol. 12(2000), p. 139-146 [6] Pessiki S, Harries K A, et al: J.
[12] Wang SY, Han KS, et al: J.
Alaywan W, et al: J.
Constr., Vol. 5(2001), p. 26-34 [45] Mirmiran A, Shahawy M, Samaan M, El Echary: J.
Online since: February 2014
Authors: Zhen Bao Sun
Additionally, its intermittent nature imposes a high ramping requirement on other power plants (Albadi and El-Saadany, 2010).
Recently, number of studies have been carried out on the bidding strategies of wind power plant in the day-ahead (DA) markets (Singh and Erlich, 2008; Matevosyan and So ¨der, 2006; Bathurst et al., 2002).
On one hand, energy storage technologies result in increased profitmargins and arbitrage opportunity for wind farm owners, on the other, their high installation cost can make wind energy uncompetitive (Li andWan, 2005).The integration of BESSwith power network has been studied widely in relation to load levelling ( Jung et al., 1996), frequency control (Kottick et al., 1993;Oudalov et al., 2007;Mercier et al., 2009) and smoothing the variability ofwind farm output (Teleke et al., 2009; Lu et al., 2009).
[2] Albadi, M.H. and El-Saadany, E.F. (2010), “Overview of wind power intermittency impacts on power systems”, Electric Power Systems Research, Vol. 80, pp. 627-32
Online since: February 2012
Authors: Jin Zhou Zhang
At this stage, researches on glass / scrap aluminum wearable material have been mostly focused on the system of SiC/AL or Al2O3/Al; but there are only a few studies on glass / scrap aluminum wearable material.
Tab.1 The chemical components of glass particles (wt%) Component SiO2 Al2O3 Fe2O3 K2O Na2O CaO MgO Impurity Wt% 65.88 4.38 0.88 0.42 14.65 7.11 2.93 Margin Tab.2 The physical performances of glass particles Density (g/cm3) Specific heat (103J/kg·K) Coefficient of heat conductivity (W/m·K) Coefficient of heat expansion (10-61/K) Elasticity modulus (104MPa) Hardness (Mohs) Sintering temperature(˚C) 2.32~2.6 0.33~1.05 0.75~0.92 8.20~10.2 6.0~7.5 5-6 720~790 Tab.3 The chemical components of waste Al-Alloy (wt%) Kinds Mg Mn Si Fe Cu Zn Cr Al Pop cans 0.8~1.3 1~1.3 <0.2 <0.7 <0.25 <0.25 <0.1 margin ZL101 0.2~0.4 <0.5 6~8 <0.6 <0.2 <0.3 <0.15 margin Tab.4 The physical performances of aluminum Density (g/cm3) Melting point (˚C) Coefficient of expansion (K-1) Specific resistance (μΩ·cm) Intensity of tension (MPa) Brinell hardness (HB) 2.69 660 23.6×10-6 2.65 80~100 24~32 1.2 The experiment methods In this experiment, the glass particles are put into the aluminum
While it is more than 15wt%, the abrasion resistance of fine particle declines more quickly than that of the coarse particle. 2.3 The development of the waste glass / scrap aluminum wearable materials The physical and mechanical performances comparison among MMC(15wt% glass content), glass and cast al-alloy 101 are shown in Tab.5.
Tab.5 Physical and mechanical performances comparison among MMC, glass and cast al-alloy 101 Item MMC Glass al-alloy 101 Density g×cm-3 2.53~2.57 2.3~2.5 2.69 Sintering temperature ˚C 575 720 660 Coefficient of thermal expansion K-1 (20~350˚C) 19×10-6 (4~11.5)×10-6 23.6×10-6 Resistivity μΩ×cm 17.4~21.4 / 2.65 Elasticity GPa 50~62 55 70 Tensile MPa 80~108 / 90 Bending strength MPa 135~205 / 145 Compressive strength MPa 220~345 / 192 Brinell hardness HB 45~60 Mohs 6~7 24~32 Wear coefficient 4.62(compare with ZL101) / 1 3 Conclusion (1) Waste glass and aluminum can be used to made a lot of the waste glass / scrap aluminum wearable materials (15wt% glass) by the method of mechanical agitation.
[4]El-Bradie Z.M., El-Azim, A.N.Abd.j.
Online since: March 2014
Authors: Caori Takeuchi, Patricia Luna
In the first part of the project, the production line of structural elements of laminated bamboo guadua was developed (Cortes et al. [1]).
The second part of the project included the test of samples with four different types of adhesives (Cortes et al. [2]) to define the adhesive that presented adequate mechanical behaviour to be used in the construction and to determine the mechanical properties of the material; the test of structural elements such as beams (Hackmayer et al. [3]), columns (Alvarado et al. [4]) and panels (Gonzalez et al. [5]) to find the design stresses and elastic values and the tests of frames with two types of bracing under lateral load (Luna & Takeuchi [6]).
Structural design elements The structural design of elements was based on the allowable stress method, where the values of allowable stress were determined by the strength values found in different mechanical tests of samples (Cortes et al. [2]), beams (Hackmayer et al. [3]) and columns (Alvarado et al. [4]) shown in Table 1.
El Cairo.
El Cairo.
Online since: January 2023
Authors: Maya Puspitasari Izaak, Henni Sitompul, Yohanes Edi Gunanto, Wisnu Ari Adi, Yosef Sarwanto
El-Batal, M.I.A.
El-Sayyad, Sh.
El-Okr, Antimicrobial activity of metal-substituted cobalt ferrite nanoparticles synthesized by sol–gel technique, Particuology, 40 (2018) 141-151
Rabbani, F,Vajhadin, et al., Anti‐bacterial and wound healing‐promoting effects of zinc ferrite nanoparticles,  J Nanobiotechnol 19 (2021) 38
Fajaroh, et al., Synthesis of ZnFe2O4 Nanoparticles with PEG 6000 and Their Potential Application for Adsorbent, IOP Conf.
Online since: January 2021
Authors: Abdelghani Laouer, Nesrine Boulaktout, El Hacene Mezaache, Salah Laouar
Al-Waeli, K.
Al-Waeli, H.
Al-Waeli, H.
Al Omari, A.
El-Amin, A.
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