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Online since: March 2025
Authors: Orest M. Ivasishin, Dmytro G. Savvakin, Pavlo E. Markovsky, Sergey V. Prikhodko, Denis Oryshych, Oleksandr Stasiuk
Powder was blended with corresponding amount of 60%Al-40%V master alloy powder (wt.%), with the particles size smaller than 63 μm to form required compositions of Ti-64 alloy.
The distribution of TiC particles in Ti-64 matrix was not completely uniform (Fig. 1b), likely due to the uneven distribution of these particles on the surfaces of the relatively coarse TiH2 and Al-V powder particles in the blends used.
When the initial TiB2 content was high in the powder blend, the solid solution of the Ti-Al-V matrix can be significantly depleted in titanium, since the ongoing TiB2+Ti=TiB reaction inevitably makes the titanium alloy matrix rich in alloying elements to a level that produces relatively small inclusions of a high-alloyed β-phase.
[3] El-Bitar T., El-Meligy M., El-Shenawy E., Almosilhy A., Dawood N.
Online since: June 2010
Authors: Li Li Wang, Dong Sheng Li, Liang Wang, Wei Jun Yang, Xiao Qiang Li
References [1] Anagnostou E.L.
[4] Zhong-Yi Cai, Shao-Hui Wang, Xu-Dong Xu, et al.
(in Chinese) [8] Ramezani, M., et al., Computer aided modelling of friction in rubber-pad forming process.
Tech. (2009), doi:10.1016/j.jmatprotec.2009.01.015 [9] Bielsa JM, et al.
(in Chinese) [12] E.L.
Online since: July 2025
Authors: Setiyo Gunawan, Nadhea Ayu Sukma, Fahmi Fahmi, Syah Sultan Ali Muzakhar, Farah Salma Elida
According to Firdaus et.al [21], this decline can be attributed to the release of Van Der Waals bonds between hydrophobic enzymes and activated carbon.
According to Huang et.al [22] showed that after 10 cycles, immobilized enzyme activity remained above 50% of its initial level, but almost no activity was observed after 15 cycles due to the weak binding of immobilized enzymes to carbon.
El Kiyat, and N.
El-Shabasy, A.
Al Indis, ‘Potensi Arang Aktif yang Terbuat dari Kulit Biji Nyamplung Sebagai Adsorben Logam Berat Kromium (VI)’, Journal Science Innovation and Technology (SINTECH), vol. 2, no. 1, pp. 35–41, Nov. 2021, doi: 10.47701/sintech.v2i1.1579
Online since: June 2014
Authors: Fabienne Touratier, Christine Boher, Elodie Cabrol, Vanessa Vidal, Farhad Rezai-Aria
Persson et al. [7] have also observed under high normal load and several strokes, that within the upper friction layer (a few nanometres thick) the cobalt HCP planes are tilted and aligned parallel to the sliding surface.
Fig. 1: Photo of the high load tribometer (equipped with a three-zone resistive furnace) Fig. 2: Scheme of the tribological tests samples Table 1: Chemical composition of the studied materials [wt.%] C Cr Mo Ni Mn Si Nb Ti Al Fe Co Stellite 21 0.27 28.0 5.00 2.40 1.00 1.30 - - - 3.50 Bal. 40NiCrMo18 0.40 1.50 0.50 4.50 - - - - - Bal. - Inconel718 0.04 18.00 3.00 Bal. - - 5.20 0.90 0.50 18.50 - Table 2: Tribological parameters used in this study Tribological test number Furnace temperature [°C] Normal load [DaN] Hertz contact pressure [MPa] Rotation movement [rpm] Test duration [min] 1 20 500 472 50 120 300 365 50 360 2 20 500 472 60 30 3 450 200 298 60 30 4 450 500 472 60 30 5 600 500 472 60 30 Microstructural observations and chemical compositions are performed on a FEI Nova Nano SEM.
Persson et al. have also observed, under high load and several strokes, that within the upper friction layer the Co-HCP basal planes have been tilted and aligned parallel to the sliding surface.
M. : Microstructural features and mechanical properties of a cobalt-based laser coating, Acta Materilia, 1997, 45(3), pp. 1225-1236 [3] Radu, I.; Li, D.Y.; Llewellyn, R.: Tribological behavior of Stellite 21 modified with yttrium, Wear, 2004, 257(11), pp. 1154-1166 [4] Shin, J.C.; Doh, J.M.; Yoon, J.K.; Lee, D.Y.; Kim, J.S.: Effect of molybdenum on the microstructure and wear resistance of cobalt-base Stellite hardfacing alloys, Surface and Coatings Technology, 2003, 166(2-3), pp. 117–126 [5] Fouilland, L.; El Mansori, M.; Gerland, M.: Role of welding process energy on the microstructural variations in a cobalt base superalloy hardfacing, Surface and Coatings Technology, 2007, 201(14), pp. 6445–6451 [6] Persson, D.
E.; Jacobson, S.; Hogmark, S.: Antigalling and low friction properties of a laser processed Co-based material, Journal of laser applications, 2003, 15(2), pp. 115-119 [8] Kashani, H.; Amadeh, A.; Ohadizadeh, A.: Effect of temperature on the strain induced γàε phase transformation in Stellite 21 during wear test, Materials Science and Engineering A, 2006, 435-436, pp. 474-477 [9] Kashani, H.; Sadeghi Laridjani, M.; Amadeh, A.; Khodagholi, M.; Ahmadzadeh, S.; The influence of volumetric dilution on the strain induced γ→ɛ martensitic transformation in GTAW processed Co–Cr–Mo alloy, Materials Science and Engineering A, 2008, 478(1-2), pp. 38–42 [10] Huang, P.; López, H.F.: Strain induced ε-martensite in a Co-Cr-Mo alloy: grain size effects, Materials Letters, 1999, 39, pp. 244-248 [11] Bhansali, K.J.; Miller, A.E.: The role of stacking fault energy on galling and wear behavior, Wear, 1982, 75(2), pp. 241-252 [12] Fouilland, L.; El Mansori, M.; Massaq, A.: Friction-induced work hardening
Online since: February 2013
Authors: Wei Ke, Wei Neng Tang, Rongshi Chen, S.Q. Li, En-Hou Han
Honma et al [4] reported the precipitating sequence in the Mg-Gd-Y-Zn-Zr alloys including β' and β1 phases and long period stacking ordered (LPSO) structure, and showed that concurrent precipitations of β' and β1 phases were associated with the maximum hardness, and the LPSO structure can also greatly contribute to the strength and ductility.
The mechanical properties of ultimate tensile strength (UTS) and yield strength (YS) and elongation (EL) of the seamless extruded plus flatted alloys before rolling are 264MPa, 220MPa and 4% for GWK930, and 303MPa, 240MPa and 8% for GWZK9300, respectively.
(UTS: ultimate tensile strength; YS: yield strength; EL: elongation to failure) UTS of the rolled GWK930 and GWZK9300 after annealing treatment at 350°C for 1h and ageing treatment at 200°C for 72h gradually increased with the rolling strains from 16% to 71%, and reached their peak values of 410MPa and 454MPa at about 71% strain, respectively, as shown in the Fig. 7, which were relatively higher strength obtained in the alloy system processed by conventional methods [2, 4, 11, 15].
Al-Samman, X.
Konopleva: Twinning, dynamic recovery and recrystallization in hot worked Mg-Al-Zn alloy, Materials Science and Engineering A, 337 (2002) 121-133
Online since: February 2024
Authors: Aeksuwat Nakwattanaset, Surasak Suranuntchai, Jidapa Leelaseat, Phiraphong Larpprasoetkun, Aekkapon Sunanta
An interesting investigation into the impact of blank holder forces and original blank sizes on the formability of an AA6061 square cup deep-drawn part was conducted by Pranavi et al. [8] through numerical simulation without an experiment.
Material model selection in pre-processing step of the finite element method is an important thing that governs the accuracy of the simulation results, as emphasized by Basak et al. [9].
Elements Al Mg Fe Cr Si Cu Mn [w/w%] 96.5217 2.81278 0.31110 0.20740 0.06938 0.04783 0.00377 The mechanical properties were investigated through uniaxial tensile tests.
El-Sherbiny, M.
El-Shazly: American Journal of Mechanical Engineering Vol. 1 (2013), pp. 20-29 [7] G.
Online since: February 2024
Authors: Tanakorn Wongwuttanasatian, Wisanu Phukaokaew, Amnart Suksri
Al-Waeli et al. [8] introduced silicon carbide (SiC) nanoparticles into a PCM to enhance the PV temperature reduction.
These findings are consistent with those of Li et al. [14] and Stejskalová et al. [15].
Velmurugan, et al.: Selection and preparation of suitable composite phase change.
Al-Waeli, H.A.
Abd El-hameed: Experimental investigation for a hybrid aluminum oxide nanofluid-phase change material photovoltaic thermal system based on outdoor test conditions.
Online since: April 2011
Authors: Daniel Fruchart, El Kebir Hlil, Janusz Toboła, Ryszard Zach, Wiesław Chajec, Mohamed Balli, Pierre Wolfers
Magnetic properties and magnetocaloric effect in selected MM’X-type (M, M’ = 3d or 4d metal, X = As, P, Ge) and Mn1-xTxAs-type (T = 3d metal) intermetallics Ryszard Zach1,* a, Wiesław Chajec1, b Janusz Toboła2,c, Daniel Fruchart3, d, El Kebir Hlil3, e, Mohamed Balli4, f and Pierre Wolfers3, g 1 Institute of Physics, Faculty of Physics, Mathematics and Applied Computer Sciences, Cracow University of Technology, 30-084 Cracow, ul.
Podchorążych 1, Poland 2 Faculty of Physics and Applied Computer Sciences, AGH Science University, al.
Introduction Since the paper published by Tegus et al. [1] concerning giant MCE in MnFeP1-xAsx and MnAs systems, several very interesting series of compounds with different substituted 3d elements were studied.
Moreover, a phonon mechanism of the magnetostructural F-P phase transition was discussed very recently by Łażewski et al. [9].
Online since: July 2022
Authors: Imene Feddal, Bochra Hafdi, Goussem Mimanne, Safia Taleb
A peak around 913.76 cm-1 Al-OH-Al bending vibration bonds.
The band around 693.08 cm-1 is relative bending of the Si-O-M bonds (M indicates the metals Al, Mg, Fe of the octahedral sites).
El Baghdad, J.
[14] Lasheen M R, El Sherif I, Dina Sabry Y, Removal of heavy metals from aqueous solution by multiwalled carbon nanotubes: equilibrium, isotherms, and kinetics.
[16] Nadem S, El Baghdad M, Rais J, Barakat A, Evaluation de la contamination en métaux lourds des sédiments de l’estuaire de bou regreg (côte atlantique, maroc).
Online since: May 2023
Authors: Neama Ahmed Sobhy, Hussein M. Ahmed, Mohamed A. El-Khateeb, Mohammed M. Hefny, Fatehy M. Abdel-Haleem
Figure 1: Schematic diagram of banana, orange, and pomegranate peels for the production of magnetic nanoparticles. 2.3 Analytical methods and the characterization of raw wastewater The orasqulia plant's wastewater is being treated in El-Sokhna, Egypt.
Jung et al. reported that with an increase in the dosage of various adsorbents, the pollutants' removal was enhanced [19] [22].
El-Khateeb, and Hussein M.
Ola Abdelwahab, Ahemed ELnemer, and Amany EL sikaily, “USE of rice husk for adsorption ofdirect dyes fromaqueous solution,” Egyption J.
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