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Online since: December 2024
Authors: A.D. Vishwanatha, Bijayani Panda, A.V. Ramesh Kumar, Anup P. Athresh
Table. 2 shows the mean values of the tensile properties of Ti-6Al-4V (YS: yield strength, UTS: tensile strength, and %El: percentage elongation).
Chemical composition of the Ti-6Al-4V base material Element N C H Fe Al V Ti 0.0055 0.014 0.0009 0.13 6.11 4.21 Balance Table 2.
Avcu et al., “Corrosion Behavior of Shot-Peened Ti6Al4V Alloy Produced via Pressure-Assisted Sintering,” Coatings, vol. 13, no. 12, Dec. 2023, doi: 10.3390/coatings13122036
Wang et al., “Effect of high energy shot-peening on the microstructure and mechanical properties of Al5052/Ti6Al4V lap joints,” J Mater Process Technol, vol. 255, pp. 76–85, May 2018, doi: 10.1016/j.jmatprotec.2017.12.005
Chen et al., “Evaluation of the residual stress and microstructure character in SAF 2507 duplex stainless steel after multiple shot peening process,” Surf Coat Technol, vol. 344, pp. 132–140, Jun. 2018, doi: 10.1016/j.surfcoat.2018.03.012
Chemical composition of the Ti-6Al-4V base material Element N C H Fe Al V Ti 0.0055 0.014 0.0009 0.13 6.11 4.21 Balance Table 2.
Avcu et al., “Corrosion Behavior of Shot-Peened Ti6Al4V Alloy Produced via Pressure-Assisted Sintering,” Coatings, vol. 13, no. 12, Dec. 2023, doi: 10.3390/coatings13122036
Wang et al., “Effect of high energy shot-peening on the microstructure and mechanical properties of Al5052/Ti6Al4V lap joints,” J Mater Process Technol, vol. 255, pp. 76–85, May 2018, doi: 10.1016/j.jmatprotec.2017.12.005
Chen et al., “Evaluation of the residual stress and microstructure character in SAF 2507 duplex stainless steel after multiple shot peening process,” Surf Coat Technol, vol. 344, pp. 132–140, Jun. 2018, doi: 10.1016/j.surfcoat.2018.03.012
Online since: August 2008
Authors: Yu Ru Chen, Long Sun Chao
Im et al. [5] had identified three main regimes, based on the energy density of laser: partial, near
complete, and complete melting.
First, Kim, et al. [10] covered the a-Si film with striped silica layers to decrease the reflectivity.
Im, el at. [12] used sequential laser pulses passing through a mask and then reaching the silicon film.
Ishikawa, et al. [13] proposed the concept of gradient method.
Ho, et al. [15] used the phase-shift mask in which one side was thick and the other was thin.
First, Kim, et al. [10] covered the a-Si film with striped silica layers to decrease the reflectivity.
Im, el at. [12] used sequential laser pulses passing through a mask and then reaching the silicon film.
Ishikawa, et al. [13] proposed the concept of gradient method.
Ho, et al. [15] used the phase-shift mask in which one side was thick and the other was thin.
Online since: July 2014
Authors: Ki Yong Ann, Sung In Hong, Joon Woo Park, Hee Jun Yang, Thamara Tofeti Lima
Wang et al studied the same with the metakaolin mixed with alkali-activator [9].
Puertas et al studied mixture of fly ashes and slag, having reported that C-S-H gel was the main reaction product as well [15].Xie and Xi detected a few small reaction products peaks for the XRD analysis [16].
As for Song et al, the main reaction product of blast furnace slag hydration is C-S-H gel with minor amounts of hydrotalcite which is formed only when the slag has a high hydration rate [17, 18].
Al-Saadoum, Effect of cement composition on chloride binding and corrosion of reinforcing steel in concrete, CemConcr Res 1991, vol.21, p.777
El-Mohr and T.D.
Puertas et al studied mixture of fly ashes and slag, having reported that C-S-H gel was the main reaction product as well [15].Xie and Xi detected a few small reaction products peaks for the XRD analysis [16].
As for Song et al, the main reaction product of blast furnace slag hydration is C-S-H gel with minor amounts of hydrotalcite which is formed only when the slag has a high hydration rate [17, 18].
Al-Saadoum, Effect of cement composition on chloride binding and corrosion of reinforcing steel in concrete, CemConcr Res 1991, vol.21, p.777
El-Mohr and T.D.
Online since: February 2024
Authors: John N. Ani, Timine Suoware, Sylvester Onyemaechi Edelugo, Benedict Nnamdi Ugwu
Han et al [6] carried out a post buckling analysis of the laminated composite plates under pure shear loading, while Priyadarsini et al [7] indicated that numerical modelling can be applied in accurate prediction of buckling.
Kumar et al [14] predicted Nonlinear-buckling analysis as a better method and suggested it for calculation or estimation of actual structures.
Peining et al. [15] points out that stiffness eccentricity is a major factor that causes axial buckling than the combined load.
via%3Dihub" T. and Jansen, E.L., “Finite element based coupled mode initial post-buckling analysis of a composite cylindrical“ ThinHYPERLINK "https://www.sciencedirect.com/science/journal/02638231"-HYPERLINK "https://www.sciencedirect.com/science/journal/02638231"Walled StructuresHYPERLINK "https://www.sciencedirect.com/science/journal/02638231" shell (2010), HYPERLINK "https://www.sciencedirect.com/science/journal/02638231/48/1"Volume 48, Issue 1, Pages 25-32,. https://doi.orgHYPERLINK "https://doi.org/10.1016/j.tws.2009.08.003"/10.1016/j.tws.2009.08.003HYPERLINK "https://doi.org/10.1016/j.tws.2009.08.003" [23] Priyadarsini, R.S., Kalyanaraman, V. and Srinivasan, S.M., “Numerical and experimental study of buckling of advanced fiber composite cylinders under axial compression”.
Kumar et al [14] predicted Nonlinear-buckling analysis as a better method and suggested it for calculation or estimation of actual structures.
Peining et al. [15] points out that stiffness eccentricity is a major factor that causes axial buckling than the combined load.
via%3Dihub" T. and Jansen, E.L., “Finite element based coupled mode initial post-buckling analysis of a composite cylindrical“ ThinHYPERLINK "https://www.sciencedirect.com/science/journal/02638231"-HYPERLINK "https://www.sciencedirect.com/science/journal/02638231"Walled StructuresHYPERLINK "https://www.sciencedirect.com/science/journal/02638231" shell (2010), HYPERLINK "https://www.sciencedirect.com/science/journal/02638231/48/1"Volume 48, Issue 1, Pages 25-32,. https://doi.orgHYPERLINK "https://doi.org/10.1016/j.tws.2009.08.003"/10.1016/j.tws.2009.08.003HYPERLINK "https://doi.org/10.1016/j.tws.2009.08.003" [23] Priyadarsini, R.S., Kalyanaraman, V. and Srinivasan, S.M., “Numerical and experimental study of buckling of advanced fiber composite cylinders under axial compression”.
Online since: April 2021
Authors: Abderrahim Guittoum, Mohamed Kechouane, Amel Kaibi, Nassim Souami
Microstructure Evolution and Mossbauer Spectroscopy Research
of Nanostructured Ni3 Fe Intermetallic
Kaibi Amel1,2,a*, Guittoum Abderrahim2,b, Souami Nassim3,c
and Kechouane Mohamed2,d
1University Larbi Tébessi - Route de Constantine 12002, Tébessa, Algeria
2Laboratoire de Physique des Matériaux (LPM), Faculté de Physique, USTHB, BP 32 El Alia, Algiers, Algeria
3Centre de Recherche Nucléaire d’Alger, 02 Bd Frantz Fanon, BP 399, Algiers, Algeria
akaibi_amel@yahoo.fr, bguittoum@yahoo.fr, csouaminassim@yahoo.fr, dkechouanem@yahoo.fr
Keywords: Intermetallic Compound, Nanocrystalline Powder, Microstructure, Magnetic Properties, Mössbauer Spectroscopy, Mechanical Alloying, Hyperfine Properties.
Chicinas et al. [11].
Our values are not far from those obtained by Chinnasamy et al. [20] with Hhf =27.85T, for mechanical alloying of NiFe at 20 h and Bruce H.
Meeves et al. [19] with Hhf =29.1T, for sample milled to 32h with a high-energy ball mill.
The evolution observed for the as milled powders are very similar to that reported by Chinnasamy et al. [20].
Chicinas et al. [11].
Our values are not far from those obtained by Chinnasamy et al. [20] with Hhf =27.85T, for mechanical alloying of NiFe at 20 h and Bruce H.
Meeves et al. [19] with Hhf =29.1T, for sample milled to 32h with a high-energy ball mill.
The evolution observed for the as milled powders are very similar to that reported by Chinnasamy et al. [20].
Online since: June 2011
Authors: Md Deros Baba, Dian Darina Indah Daruis, Bahurudeen Nuhmandeen
Methodology
The structure of this survey questionnaire was based on a survey of fatigue factors in regional airline operations by Co et al. [5].
These defined ratings were similar to survey of fatigue carried out by Co et al. [5].
The study by Rosekind et al. [6] has shown that naps up to 40 minutes are both safe and effective for long-haul pilots.
Sasaki et al. [7] and many research papers has indicated that individuals’ subjective perception of their sleep often differ from physiological parameters.
[5] E.L.
These defined ratings were similar to survey of fatigue carried out by Co et al. [5].
The study by Rosekind et al. [6] has shown that naps up to 40 minutes are both safe and effective for long-haul pilots.
Sasaki et al. [7] and many research papers has indicated that individuals’ subjective perception of their sleep often differ from physiological parameters.
[5] E.L.
Online since: September 2008
Authors: Ritva Serimaa, Marko Peura, Seppo Andersson, Ari Salmi, Timo Karppinen, Mika Torkkeli, Edward Hæggström
Previously, Andersson et al.
Koponen et al. studied using ultrasound samples of Norway spruce from stems that were grown either at a medium- or a highfertility site in Finland [14].
The dependence of the stiffness modulus on the mean MFA corresponds well to the modelling results of Astley et al. [22].
Such ideas have been recently applied to polymeric materials, but not yet to wood (Salmi et al. 2007, unpublished).
El-Hosseiny, K.
Koponen et al. studied using ultrasound samples of Norway spruce from stems that were grown either at a medium- or a highfertility site in Finland [14].
The dependence of the stiffness modulus on the mean MFA corresponds well to the modelling results of Astley et al. [22].
Such ideas have been recently applied to polymeric materials, but not yet to wood (Salmi et al. 2007, unpublished).
El-Hosseiny, K.
Online since: September 2021
Authors: Zainab Naser Jameel, Halah H. Rashed
It can be mentioned that Ni doping CdS thin film by spray pyrolysis is available in several literatures, (A.Rmili et.al, 2013)[8] they found that the band gap decrease with increase Ni ratio, (Manju Mishra Patidar et al, 2015)[17], a change in structure from CdS nanorod into nano particles investigated by SEM and XRD-diffractin results after the doping process, while (R.
Murugesan et.al.2017)[18] They observed that the average crystallite size was increased after the doping.
[5] Najiba Abdullah, Al-Hamdani Ameer, Abdul Hussain Salih, “Preparation of Nanocrystalline Copper Doped CdS Thin Films by Spray Pyrolysis Method”, Diyala journal for pure sciences , Vol. 8, No. 3(2012) 289-300
El Kouari , B.
Murugesan et.al.2017)[18] They observed that the average crystallite size was increased after the doping.
[5] Najiba Abdullah, Al-Hamdani Ameer, Abdul Hussain Salih, “Preparation of Nanocrystalline Copper Doped CdS Thin Films by Spray Pyrolysis Method”, Diyala journal for pure sciences , Vol. 8, No. 3(2012) 289-300
El Kouari , B.
Online since: May 2014
Authors: Asnul Hadi Ahmad, Dermot Brabazon, Sumsun Naher
Table 1: The chemical composition of the aluminium 7075
Source (wt%) Al Cr Cu Fe Mg Mn Si Ti Zn
Experiment 88.5 0.20 2.02 0.24 2.38 0.12 0.14 0.09 6.04
ASM [21] 87.1-91.4 0.18-0.28 1.2-2.0 <0.5 2.1-2.9 <0.3 <0.4 <0.2 5.1-6.1
Normal solidification experiment was performed to evaluate the 7075 microstructure formation which was solidified at a lower cooling rate compare with a higher cooling rate in copper mould.
[4] Chinesta F, Cueto El, Atkinson H, Current Status of Semi-Solid Processing of Metallic Materials, Advances in Material Forming, Springer, Paris, 2007, pp 81-98
[17] Mohammadi H, Ketabchi M, Kalaki A, Microstructural evolution and mechanical properties of back-extruded Al 7075 alloy in the semi-solid state, International Journal of Material Forming (2012) 5, 109-119
[23] Gonzalez G, Lara-Rodriguez G, Sandoval-Jiménez A, Saikaly W, Charai A, The influence of cooling rate on the microstructure of an Al–Ni hypereutectic alloy, Mater Characterization (2008) 59, 1607-1612
[26] Gowri S and Samuel F, Effect of cooling rate on the solidification behavior of Al-7 Pct Si-SiCp metal-matrix composites, Metallurgical and Materials Transactions A (1992) 23, 3369-3376.
[4] Chinesta F, Cueto El, Atkinson H, Current Status of Semi-Solid Processing of Metallic Materials, Advances in Material Forming, Springer, Paris, 2007, pp 81-98
[17] Mohammadi H, Ketabchi M, Kalaki A, Microstructural evolution and mechanical properties of back-extruded Al 7075 alloy in the semi-solid state, International Journal of Material Forming (2012) 5, 109-119
[23] Gonzalez G, Lara-Rodriguez G, Sandoval-Jiménez A, Saikaly W, Charai A, The influence of cooling rate on the microstructure of an Al–Ni hypereutectic alloy, Mater Characterization (2008) 59, 1607-1612
[26] Gowri S and Samuel F, Effect of cooling rate on the solidification behavior of Al-7 Pct Si-SiCp metal-matrix composites, Metallurgical and Materials Transactions A (1992) 23, 3369-3376.
Online since: July 2017
Authors: Heidimarie N.A. Fleischer, Gloria Manu, Abu Yaya, Han Zhou, Johnson K. Efavi, Elvis K. Tiburu, Edmund O. Aidoo, Ali Salifu
The next activity was to develop chitosan/zeolite nanocomposite using our locally synthesized linde type A (LTA) aluminosilicate zeolite with a (Si/Al~1.2) [36].
However, the XRD results compared favorably in terms of diffraction angles and the Miller indices with other studies conducted by Rahman et al. on chitin from calcified coralline algae [34] and skeleton [25].
The FTIR spectrum compared very well with the FTIR analysis of α chitin elucidated by Ehrlich et al. [38, 39].
The chitosan peaks exhibited similar 13C relaxation times compared to similar studies conducted by Duarte el al [43].
However, the XRD results compared favorably in terms of diffraction angles and the Miller indices with other studies conducted by Rahman et al. on chitin from calcified coralline algae [34] and skeleton [25].
The FTIR spectrum compared very well with the FTIR analysis of α chitin elucidated by Ehrlich et al. [38, 39].
The chitosan peaks exhibited similar 13C relaxation times compared to similar studies conducted by Duarte el al [43].