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Online since: August 2012
Authors: Iain Todd, Alfred T. Sidambe, Fatos Derguti
The oxygen atoms interact with both the hydrostatic and shear stress fields dislocations, affecting both edge and screw dislocation motion [8] [9].
The effect of the interstitials on wrought and cast titanium is well published, but the relationship between interstitial levels and mechanical properties in metal injection moulded titanium is still not well understood mainly because of other factors such as porosity and microstructure in MIM parts.
Void coalescence, voids nucleation, grain sizes can be additional contributors with fracture strains interacting with these factors unique to MIM.
Scully, The effect of residual interstitial elements and iron on mechanical properties of commercially pure titanium, Mater.
Griffin, Effect of oxygen and hydrogen on mechanical properties of commercial purity titanium, Int.
The effect of the interstitials on wrought and cast titanium is well published, but the relationship between interstitial levels and mechanical properties in metal injection moulded titanium is still not well understood mainly because of other factors such as porosity and microstructure in MIM parts.
Void coalescence, voids nucleation, grain sizes can be additional contributors with fracture strains interacting with these factors unique to MIM.
Scully, The effect of residual interstitial elements and iron on mechanical properties of commercially pure titanium, Mater.
Griffin, Effect of oxygen and hydrogen on mechanical properties of commercial purity titanium, Int.
Online since: July 2011
Authors: Lin Yan Jia, Yan Wen Tian, Zhong Bao Shao
The luminescent properties of YBO3:Eu3+ phosphor with 25 mol% doping concentration of Eu3+ is optimal.
Introduction Much attention has been paid to rare earth borates due to their stable physicochemical properties , ideal vacuum ultraviolet (VUV) absorption and non-linear optical properties [1,2].
Phosphor is one of the important factors affecting the PDP device performance [3,4].
The luminescent properties were measured by a Hitachi F-7000 type fluorospectrophotometer at room temperature (PMT Voltage: 500V, Scan speed: 1200 nm/min).
Result and discussion Effect of ball-milling temperature Calcining temperature is one of the important factors affecting the phosphor luminescent intensity.
Introduction Much attention has been paid to rare earth borates due to their stable physicochemical properties , ideal vacuum ultraviolet (VUV) absorption and non-linear optical properties [1,2].
Phosphor is one of the important factors affecting the PDP device performance [3,4].
The luminescent properties were measured by a Hitachi F-7000 type fluorospectrophotometer at room temperature (PMT Voltage: 500V, Scan speed: 1200 nm/min).
Result and discussion Effect of ball-milling temperature Calcining temperature is one of the important factors affecting the phosphor luminescent intensity.
Online since: June 2012
Authors: Yasuhiro Okamoto, Akira Okada, Takayuki Hirano, Yoshiyuki Uno, Tomokazu Sakagawa, Shinichi Nakashiba
However, even by using the harmonics of the Nd:YAG laser, a heat affected zone is inevitable due to the plasma generation.
Introduction Silicon carbide has superior properties such as high thermal conductivity, hardness and electrical strength, which lead to high-performance semiconductor devices with high-speed responses under high temperature conditions.
However, in the case of traditional mechanical processing, debris and cracks remain on the machined surface because of its high hardness and brittleness.
The main conclusions obtained in this study are as follows: (1) The surrounding gas pressure was one of the important factors in relation to the intensity and existing duration of laser induced plasma
Uno, Micro-Machining Characteristics of Ceramics by Harmonics of Nd:YAG laser, Journal of Advanced Mechanical Design Systems and Manufacturing 2 (2008) 661-667
Introduction Silicon carbide has superior properties such as high thermal conductivity, hardness and electrical strength, which lead to high-performance semiconductor devices with high-speed responses under high temperature conditions.
However, in the case of traditional mechanical processing, debris and cracks remain on the machined surface because of its high hardness and brittleness.
The main conclusions obtained in this study are as follows: (1) The surrounding gas pressure was one of the important factors in relation to the intensity and existing duration of laser induced plasma
Uno, Micro-Machining Characteristics of Ceramics by Harmonics of Nd:YAG laser, Journal of Advanced Mechanical Design Systems and Manufacturing 2 (2008) 661-667
Online since: June 2014
Authors: R. Bennacer, E. Walther, C. Desa
The range of interest and condition of non-negativity of the equilibrium distributions are identified for a broad range of diffusive properties ratios.
(15) Figure 3: Influence of the diffusivity ratio on the relaxation factors and non-negativity zone Range of use for heterogeneous materials.
The LBM-BGK simulation of the diffusion process in heterogeneous media hence requires a control of the relaxation factors ensuring the positivity of the equilibrium distribution functions for given properties.
The LBM code was previously validated with the Mori and Tanaka's analytical solution allowing the upper and lower bound of equivalent properties on heterogeneous materials.
The LBM computing calculation on multiscale heterogeneous media permit the identification of the apparent diffusive properties.
(15) Figure 3: Influence of the diffusivity ratio on the relaxation factors and non-negativity zone Range of use for heterogeneous materials.
The LBM-BGK simulation of the diffusion process in heterogeneous media hence requires a control of the relaxation factors ensuring the positivity of the equilibrium distribution functions for given properties.
The LBM code was previously validated with the Mori and Tanaka's analytical solution allowing the upper and lower bound of equivalent properties on heterogeneous materials.
The LBM computing calculation on multiscale heterogeneous media permit the identification of the apparent diffusive properties.
Online since: May 2020
Authors: Yu Zhao, Xu Ran, Shao Hui Liu
However, the relatively low mechanical properties of copper, such as low strength, low wear resistance cannot meet some special requirements, which limit its further applications [2].
In recent years, most studies mainly focus on graphene reinforced copper matrix composites to improve mechanical properties of the matrix [10-12].
Choi, Effect of processing route on mechanical and thermal properties of few-layered graphene (FLG)-reinforced copper matrix composites, Journal of Alloys and Compounds 754 (2018) 7-13
Seokwoo, Enhanced mechanical properties of graphene/copper nanocomposites using a molecular-level mixing process, Advanced Materials 25(46) (2013) 6724-6729
Xie, Highly enhanced mechanical properties in Cu matrix composites reinforced with graphene decorated metallic nanoparticles, Journal of Materials Science 49(10) (2014) 3725-3731
In recent years, most studies mainly focus on graphene reinforced copper matrix composites to improve mechanical properties of the matrix [10-12].
Choi, Effect of processing route on mechanical and thermal properties of few-layered graphene (FLG)-reinforced copper matrix composites, Journal of Alloys and Compounds 754 (2018) 7-13
Seokwoo, Enhanced mechanical properties of graphene/copper nanocomposites using a molecular-level mixing process, Advanced Materials 25(46) (2013) 6724-6729
Xie, Highly enhanced mechanical properties in Cu matrix composites reinforced with graphene decorated metallic nanoparticles, Journal of Materials Science 49(10) (2014) 3725-3731
Online since: February 2019
Authors: A.K. Tingaev
To reduce the residual stresses and to partially restore the plastic properties, all the tube assemblies of OSP undergo the heat treatment in the form of high temperature tempering at 6500C in the furnace.
Grigoryants, Theory of welding deformations and stresses, Moscow: Mechanical Engineering, 1984
Kolomiytsev, Influence of residual stresses and properties of HAZ metal on fatigue of welded joints in a corrosive environment, Automatic welding, 9 (1990) 5-8
Pshenichnikova, Influence of technological and operational factors on the bearing capacity of welded joints of offshore fixed platforms, Technology of shipbuilding, 9 (1990) 79-84
Rensky and others, Strain gauges in mechanical engineering: A reference book, Moscow: Mechanical Engineering, 1975
Grigoryants, Theory of welding deformations and stresses, Moscow: Mechanical Engineering, 1984
Kolomiytsev, Influence of residual stresses and properties of HAZ metal on fatigue of welded joints in a corrosive environment, Automatic welding, 9 (1990) 5-8
Pshenichnikova, Influence of technological and operational factors on the bearing capacity of welded joints of offshore fixed platforms, Technology of shipbuilding, 9 (1990) 79-84
Rensky and others, Strain gauges in mechanical engineering: A reference book, Moscow: Mechanical Engineering, 1975
Online since: September 2011
Authors: Xiu Li Du, Zhen Bao Li, Er Wei Guo, Hong Yu Zhou
Size effect, referring to mechanical properties of materials change with the geometry changes, is the basic characteristic of brittle and quasi-brittle materials.
Introduction Size effect[1-2] means the mechanical properties of the material is no longer a constant, changing with the geometry changes, For concrete materials, compressive strength and tensile strength decrease with the sections size increases, on the contrary, the fracture energy increases.
The mechanical performance of RC members, composed mainly by steels and concrete, depends on mechanical properties of concrete and steel.
Size effect of concrete will inevitably affect the mechanical properties of RC members.
The depth factor βd is given in order to consider the size effect.
Introduction Size effect[1-2] means the mechanical properties of the material is no longer a constant, changing with the geometry changes, For concrete materials, compressive strength and tensile strength decrease with the sections size increases, on the contrary, the fracture energy increases.
The mechanical performance of RC members, composed mainly by steels and concrete, depends on mechanical properties of concrete and steel.
Size effect of concrete will inevitably affect the mechanical properties of RC members.
The depth factor βd is given in order to consider the size effect.
Online since: August 2008
Authors: Pitak Laoratanakul, Nidchakarn Krueson, H. Manuspiya, H. Ishida
Dielectric Properties Enhancement in Polybenzoxazine Composite at
Multi-Frequency Range
N.
In this work, the dielectric properties of a surface-treated BST powder-polybenzoxazine composite were studied.
However, it was reported that the uniform distribution of ceramic filler is one of the important factors that strongly affect the dielectric properties in 0-3 polymer-ceramic composites [3].
Thus the surface modification of ceramic fillers was interested as the method to improve the dielectric properties in PBZ-BST composites in this research.
Dielectric Properties From Figure 2, it can be seen that at the same frequency, dielectric constants of the composites increased with the volume fraction of the BST ceramic powders.
In this work, the dielectric properties of a surface-treated BST powder-polybenzoxazine composite were studied.
However, it was reported that the uniform distribution of ceramic filler is one of the important factors that strongly affect the dielectric properties in 0-3 polymer-ceramic composites [3].
Thus the surface modification of ceramic fillers was interested as the method to improve the dielectric properties in PBZ-BST composites in this research.
Dielectric Properties From Figure 2, it can be seen that at the same frequency, dielectric constants of the composites increased with the volume fraction of the BST ceramic powders.
Online since: October 2013
Authors: Marián Kučera, Petra Semanová
The performance of MWFs depends on properties such as specific heat, viscosity, density and thermal conductivity.
On the other hand, MWFs are associated with formation of liquid aerosols (mists) that represents two types of occupational risk factors for machine operators - chemical and biological.
The cooling and flowing properties are better while the lubricating ability is poorer than in the soluble oils. 4.
Atomization is a purely mechanical process.
There are, however, multiple confounding factors that work to modify the conclusion that there were increases in stomach cancer [12].
On the other hand, MWFs are associated with formation of liquid aerosols (mists) that represents two types of occupational risk factors for machine operators - chemical and biological.
The cooling and flowing properties are better while the lubricating ability is poorer than in the soluble oils. 4.
Atomization is a purely mechanical process.
There are, however, multiple confounding factors that work to modify the conclusion that there were increases in stomach cancer [12].
Online since: February 2026
Authors: Ondari Brian Overmars, Stephen Kimutai, Emmanuel Mukubwa
The factors that affect each of the properties negatively and positively were determined from the models.
Briquette burning time is influenced by VM among other factors, [51].
This therefore means that during the manufacture of briquettes, all these factors must be kept low.
External factors such as environmental conditions are ignored.
The material properties such as porosity and density are also assumed to be uniform.
Briquette burning time is influenced by VM among other factors, [51].
This therefore means that during the manufacture of briquettes, all these factors must be kept low.
External factors such as environmental conditions are ignored.
The material properties such as porosity and density are also assumed to be uniform.