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Online since: October 2015
Authors: Ján Duplák, Anton Panda, Iveta Pandová, Miroslav Kormoš, Slavko Jurko
El-Hofy, Machining Technology: Machine Tools and Operations, CRC Press, 2008
Hatala et.al, T-Vc Dependence for sintered metal in standard ISO 3685, Technological Engineering 7/2 (2010) 6-9
Zajac et al, Cutting facilities of new type of came cutting material, in: Proceedings of the Conference PPTO, Košice, 1995, pp. 138-139
Cep et al, Surface roughness after machining and influence of feed rate on process, Key Engineering Materials 581 (2014) 341-347
Zelenak et al, Comparison of mechanical properties of surface layers with use of nanoindentation and microindentation tests, Metalurgija 51/3 (2012) 309-312
Online since: January 2012
Authors: Gholam Reza Razavi, Hossein Monajati
TWIP steels consist of Fe-Mn-Al-Si elements.
Table 1: Chemical composition of the steel (weight percent) S Fe Mo Al Si Mn C Steel <0.06 Bal. - 2 3 32.9 0.13 1 Weight loss measurements In order to fulfill corrosion test we used weight loss and polarization methods.
Also, they reported that anodic passivation in HNO3 aqueous solution can improve the corrosive behavior of Fe-Mn-Al alloys in the presence of chloride solutions up to 30%.
Meyer, “High strength Fe-Mn-(Al, Si) TRIP/TWIP steels development – properties – application”, International Journal of Plasticity, 16, 2000, 1391-1409
El-Zeky, “Effect of anodic passivation on the corrosion behaviour of Fe-Mn-Al steels in 3.5%NaCl”, Proceedings of the 9th International Symposium on the Passivation of Metals and Semiconductors and the Properties of ThinOxide Layers, Paris, 2005, 77-82
Online since: July 2005
Authors: Min S. Yoo, Dae H. Kang, Sung S. Park, Nack Kim
.% Al-0.75wt.% Zn-0.21wt.% Mn), AZ61-Si-P (Mg-5.82wt.% Al-1wt.% Zn-0.79wt.% Si-0.01wt.% Mn- 0.08wt.
%P) [6,7], and two experimental alloys, TA83 (Mg-7.45wt.% Sn-2.69wt.% Al) and TAS831-X (Mg-7.79wt.% Sn-2.73wt.% Al-0.70wt.% Si-X) [3].
It is well known that the poor creep resistance of Al containing alloys is due to coarsening and discontinuous grain boundary precipitation of Mg17Al12 particles from the supersaturated solid solution.
These results indicate that the presence of thermally stable second phase particles within matrix is beneficial 60 90 120 150 180 Yield Strength (MPa) AZ91 AZ61-Si-P TA83 TAS831-X Diecast AZ91 Diecast TAS831-X RT 150 200 AZ91 AZ61 TA83 TAS DC DC -Si-P 831 AZ91 TAS -X 831-X 10µm (a) 200nm (b) Temperature (�) 0 50 100 150 200 250 Strength (MPa) YS UTS El DC : Diecast to the creep resistance of the currently studied Mg alloys.
Online since: April 2024
Authors: Ahmed Elwardany, Hassan Shokry, Prince Oppong Amoh, Manabu Fujii
Kumar et al. [18] analyzed the effect of copper doping on the sensitivity of H2S in an article entitled “copper doped SnO2 nanowires as highly sensitive H2S gas sensor.
Kenneth Mensah et al. [29] synthesized low-cost graphene from these plastics for varied environmental applications.
Hyoung Lee, Changes in the crystal structure of SnO2 nanoparticles and improved H2S gas-sensing characteristics by Al doping, Appl.
El-Khouly, Efficient removal of noxious methylene dye by low-cost and reusable composite beads based on cellulose acetate/banana pseudo-stem fiber, Biomass Convers.
Al-Ghouti, D.A.
Online since: May 2011
Authors: Fu Lin Mao, Wen Sheng Li, Xiao Ping Zhou
Kunimori, et al.
Koso, et al.
Simonetti, Jeppe Rass-Hansen, and E.L.
Kunkes, et al.
Gallezot, et al.
Online since: March 2008
Authors: Psantu K. Datta, Hai Liang Du, Bai Yang Lou
Strafford and Datta [1], and Datta and Du et al [2] have comprehensively reviewed the process of sulphidation.
Consideration of Some Previous Experimental Results Literature reveals beneficial effects of Cr [6] and Al [7] in inhibiting sulphidation attack.
Recognising the presence of a finite amount of pO2, both Cr and Al and preferably in combination are considered essential elements to be present in sulphidation resistant materials.
Recent further studies on a series of CoCr-Al-Y-X alloys containing refractory metals, at various levels and different combinations, under similar conditions of environment and temperature have demonstrated much improved resistance to sulphidation.
The results from these studies have also allowed the development of a model for the degradation due to HT sulphidation as given by Du and Datta el al [10,11].
Online since: October 2010
Authors: Cheng Liu, Wei Chen, Man Wang, Zhe Cao
Similar results were found with respect to phenol conducted by Liu et al [9].
[2] Momania F A., Smith D W., El-Din M G: Journal of Hazardous Materials Vol.150 (2008), p.238-249
W., et al: Chemical Engineering Vol.129 (2007), p. 153-159
Umebayashi, et al: Appl.
Al-Shahry,W.B.
Online since: May 2006
Authors: Cristina Martín, Amalia M. Pérez Grueso, Daniel Carriazo, Margarita del Arco, Vicente Rives
Experimental Hydrotalcites containing chromate (CrO42) in the interlayer and with Al together with different divalent cations (Mg, Zn) in the brucite-like layers were synthesized following the ion exchange preparation method.
The precursors used for the exchange processes were the corresponding chloride-LDHs which had been prepared in the following way: given amounts of MCl2 · 6H2O (M=Mg, Zn) and AlCl3 · 6H2O corresponding to a M2+/Al 3+ molar ratio of 2 were dissolved in 200 mL of CO2-free water and then added dropwise to 100 mL of water (previously decarbonated).
Element chemical analysis for Mg, Zn, Al and Cr were carried out in Servicio General de Análisis Químico (University of Salamanca, Spain) by atomic absorption in a Mark 2 ELL-240 instrument after dissolving the samples in nitric acid.
The FT-IR spectra of the MgAlCr and ZnAlCr samples shows in addition to the hydroxyl groups and water characteristic bands (3445-3462 cm-1 (υOH), 1630 cm-1 (δHOH)), other ones corresponding to Mg/Al-OH translation modes (bands at 390, 448, 555, and 620 cm-1) or Zn/Al-OH translation modes (324, 427, 552 and 620 cm-1) [15].
El Maki, A.
Online since: March 2020
Authors: Azza Ahmed, Hoda El Faramawy, Saeed Ghali, Fathy Baiomy, Michael Lamie, Mamdouh Eissa
Early wood et al [2] studied the formation of nodules of iron-rich oxides on stainless steels.
Hosoi et al [4] studied the oxidation behavior of Cr 12%, Mn 15%, Ni 1% alloy containing nitrogen at 773-973 K. they found that the oxidation rate of alloy was very low at 773 K.
However, Isaartel et al [9] considered the influence of nitrogen on the oxidation behavior AISI 304 steel in air at 800 oC.
Masuyama et al [22].
Kim et al., "Deformation Behavior of Nitrogen Bearing Austenitic Steels with Various Nitrogen Contents", Key Engineering Materials, Vols. 345-346, pp. 117-120, 2007 [18] Saeed N.
Online since: January 2021
Authors: Norhan Sayed, Mohamed Abdel Hamid, Karim El-Dash
Total Sustainable Evaluation for Road Projects Norhan Sayed1,a*, Mohamed Abdel-Hamid2,b, Karim El-Dash3,c 1-3Benha University, Faculty of Engineering Shoubra Civil Engineering, Cairo, Egypt amohamedmagdy.asha@gmail.com, bmhamid01@gmail.com, ck_eldash@hotmail.com Keywords: Infrastructure, roads, sustainability.
Despite the fact that the project environmental and social impacts represent up to 400% of the total cost for some projects (Rahman et al., 2005) [22].
China”. https://www.researchgate.net/publication/231857681 [2] Kim, B. et al., Greenhouse Gas Emissions from Onsite Equipment Usage in Road Construction. 2012.
Carmichael (2016) A proposed framework for assessing the sustainability of infrastructure, International Journal of Construction Management, 16:4, 281-298, DOI: 10.1080/15623599.2016.1146115 [19] Papajohn, D., Brinker, C., & El Asmar, M.
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