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Online since: March 2012
Authors: Zied Antar, Hervé Noel, Jean François Feller, Patrick Glouannec, Khaled Elleuch
Kudish et al [5].
Once the spectral reflectivity rl of the body was measured, we deduce the absorptivity from al=1-rl.
On the assumption of a diffuse emission, the application of Kirchhoff's law gives el=al.
Kudish and al.
Barone, et al.
Once the spectral reflectivity rl of the body was measured, we deduce the absorptivity from al=1-rl.
On the assumption of a diffuse emission, the application of Kirchhoff's law gives el=al.
Kudish and al.
Barone, et al.
Online since: September 2015
Authors: Lorenz Singheiser, Sebastian Stille, Tilmann Beck
.: +49 2461/61-3694
Keywords: AA 2024, AA 7075, Al-cladding, riblet structure, fracture mechanics
Abstract.
A detailed assessment of influencing factors on the riblet structuring process of AA 2024 is provided in the study by Pöplau et al. [19].
The crack initiation at intermetallic phases at the surface agrees with the findings of Mayer et al. [13].
For AA 7075, Mayer et al. [14] found a threshold value of around 1.55 MPam.
For crack lengths shorter than the El Haddad parameter a0 [26], the crack propagation regime is limited by the fatigue strength of the substrate material (cf. corrected data in Fig. 1 for AA 2024).
A detailed assessment of influencing factors on the riblet structuring process of AA 2024 is provided in the study by Pöplau et al. [19].
The crack initiation at intermetallic phases at the surface agrees with the findings of Mayer et al. [13].
For AA 7075, Mayer et al. [14] found a threshold value of around 1.55 MPam.
For crack lengths shorter than the El Haddad parameter a0 [26], the crack propagation regime is limited by the fatigue strength of the substrate material (cf. corrected data in Fig. 1 for AA 2024).
Online since: May 2022
Authors: Zahra Keykhaee, Amin Bahmani, Naghmeh Sattarahmady, Marzieh Ghanbari Jahromi, Ehsan Shokri
In the EDX spectrum, weak signals from other elements like C, Cl, O, Si, Na, and Al were available, which might be related to plant biochemical (Figure 3a).
Al-Heety, A.R.
El-Kassem, H.M.
El-Mokhtar, N.A.
El-Shanawany, E.H.
Al-Heety, A.R.
El-Kassem, H.M.
El-Mokhtar, N.A.
El-Shanawany, E.H.
Online since: November 2023
Authors: John G. Speer, Diptak Bhattacharya, Jake A. Colburn, Jonah Klemm-Toole
Al to the lower Si steel resulted in a small further increase in LME sensitivity; further work is underway to better characterize the LME behavior of Al-added steels.
Both the Low-Si and Low-Si, Hi-Al steels exhibited no ductility loss at 600°C.
Al addition.
Al) in a ternary Fe-Zn-Al alloy at a fixed Fe/Zn ratio of 20:80.
El-Sari, M.
Both the Low-Si and Low-Si, Hi-Al steels exhibited no ductility loss at 600°C.
Al addition.
Al) in a ternary Fe-Zn-Al alloy at a fixed Fe/Zn ratio of 20:80.
El-Sari, M.
Online since: June 2010
Authors: Gusri Akhyar Ibrahim, Che Hassan Che Haron, Jaharah Abd. Ghani
Tool Wear Performance of CVD-Insert during Machining of
Ti-6%Al-4%V ELI at High Cutting Speed
Gusri Akhyar Ibrahima , Che Hassan Che Haronb and Jaharah Abd.
It is clearly seen that a typical three-stages pattern of tool wear was obtained, while was similar with the pattern reported by Jawaid et al. [8] when machining titanium alloy with coated and uncoated carbide tools.
Che Haron et al. [6] reports that there was a strong bonding between the chip and tool material.
As stated by Gusri et al. [13] that the depth cut significantly contributed to the cutting time when machining titanium alloy at high cutting speed.
El-Maghribi: EMARC Universiti Kebangsaan Malaysia (2007)
It is clearly seen that a typical three-stages pattern of tool wear was obtained, while was similar with the pattern reported by Jawaid et al. [8] when machining titanium alloy with coated and uncoated carbide tools.
Che Haron et al. [6] reports that there was a strong bonding between the chip and tool material.
As stated by Gusri et al. [13] that the depth cut significantly contributed to the cutting time when machining titanium alloy at high cutting speed.
El-Maghribi: EMARC Universiti Kebangsaan Malaysia (2007)
Online since: September 2020
Authors: Andrey V. Nomoev, E.Ch. Khartaeva, V.V. Syzrantsev, E.L. Dzidziguri, N.S. Khiterkheeva, S.P. Bardakhanov, E.V. Batueva, S.V. Kalashnikov
Syzrantsev1, E.L.
Doranian, Effect of laser fluence on the characteristics of Al nanoparticles produced by laser ablation in deionized water, Optics and Spectrosopy, 118(3) (2015) 472-481
Dizajghorbani Aghdama et al., Ablation time and laser fluence impacts on the composition, morphology and optical properties of copper oxide nanoparticles, Optical Materials, 91 (2019) 433–438
Vikulina et al., Determining the Degree of Nanopowders Hydrophilicity by the Ratio Fractal Dimension to the Specific Surface, Advanced Materials Research, 1085 (2015) 44-49
Doranian, Effect of laser fluence on the characteristics of Al nanoparticles produced by laser ablation in deionized water, Optics and Spectrosopy, 118(3) (2015) 472-481
Dizajghorbani Aghdama et al., Ablation time and laser fluence impacts on the composition, morphology and optical properties of copper oxide nanoparticles, Optical Materials, 91 (2019) 433–438
Vikulina et al., Determining the Degree of Nanopowders Hydrophilicity by the Ratio Fractal Dimension to the Specific Surface, Advanced Materials Research, 1085 (2015) 44-49
Online since: March 2015
Authors: Jia Qiang Lei, Jie Xue, Sheng Yu Li, Cui Wang, Jie Zhou, Dong Lei Mao
Introduction
Nebkhas, or Nabkhas, are mounds of aeolian sediments accumulated within or around shrubs (Cooke et al., 1993; Magdy et al., 2003; Du et al., 2010).
Alhagi sparsifolia Nebkhas (wu et al., 2008), Haloxylon ammodendron Nebkhas (Lu, 2011), Tamarix ramosissima Nebkhas (Yang et al., 2012), Karelinia caspica Nebkhas (Wang et al., 2013)).
[6] Khalaf F I, Al-Awadhi J M. 2012.
[7] Khalaf F I, Misak R, Al-Dousari A. 1995.
El-Bana, Ivan Nijs, Abdel-Hamid A.
Alhagi sparsifolia Nebkhas (wu et al., 2008), Haloxylon ammodendron Nebkhas (Lu, 2011), Tamarix ramosissima Nebkhas (Yang et al., 2012), Karelinia caspica Nebkhas (Wang et al., 2013)).
[6] Khalaf F I, Al-Awadhi J M. 2012.
[7] Khalaf F I, Misak R, Al-Dousari A. 1995.
El-Bana, Ivan Nijs, Abdel-Hamid A.