Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: December 2010
Authors: Hong Xiao Wang, Chun Sheng Wang, Chun Yuan Shi
The chemical components and mechanical properties of SUS301L are given in Table1.
Chemical components and mechanical properties of SUS301L[7] Chemical components /% Mechanical properties C Si Mn P S Ni Cr N σs (Mpa) σb (Mpa) δ/% HV <0.030 <1.00 <2.00 <0.045 <0.030 6.00-8.00 16.00-18.00 <0.20 >685 >930 >20 <218 A continuous wave (CW) disk laser (Trudisk4002) in TEM00 mode was used with the power of 4 kW and a beam quality of 8 mm*mrad.
Test Methods: orthogonal test pilot. 3 factors A, B, C with 3 levels (Table2) were selected.
The factors and levels of the laser welding experiment Levels Factors Experiment spots A B C Laser power (kw) Welding speed(m /min) Focal position(mm) 1 1.5 1.7 0 A1B1C1 A1B2C2 A1B3C3 2 2.0 2.2 0.5 A2B1C2 A2B2C3 A2B3C1 3 2.5 2.7 1.0 A3B1C3 A3B2C1 A3B3C2 RESULTS AND DISCUSSION.
And k=K/3 is to compare the factors.
Chemical components and mechanical properties of SUS301L[7] Chemical components /% Mechanical properties C Si Mn P S Ni Cr N σs (Mpa) σb (Mpa) δ/% HV <0.030 <1.00 <2.00 <0.045 <0.030 6.00-8.00 16.00-18.00 <0.20 >685 >930 >20 <218 A continuous wave (CW) disk laser (Trudisk4002) in TEM00 mode was used with the power of 4 kW and a beam quality of 8 mm*mrad.
Test Methods: orthogonal test pilot. 3 factors A, B, C with 3 levels (Table2) were selected.
The factors and levels of the laser welding experiment Levels Factors Experiment spots A B C Laser power (kw) Welding speed(m /min) Focal position(mm) 1 1.5 1.7 0 A1B1C1 A1B2C2 A1B3C3 2 2.0 2.2 0.5 A2B1C2 A2B2C3 A2B3C1 3 2.5 2.7 1.0 A3B1C3 A3B2C1 A3B3C2 RESULTS AND DISCUSSION.
And k=K/3 is to compare the factors.
Online since: December 2012
Authors: Xin Xin Zhang, Xiao Li Dong, Xiu Fang Zhang, Chun Ma, Hong Chao Ma, Fei Shi, Mang Xue, Xiaoyan Mou, Chuan Rong
Among the semiconductors employed, TiO2 are the most extensively used photocatalyst due to their high photocatalytic activity, non-toxic nature, inexpensive, excellent chemical and mechanical stability[3].
Sulfide photocatalysts have good light absorption properties and photocatalytic properties, but single sulfides are easy to appear light corrosion phenomenon and the photocatalytic efficiency is low [5,6].
The calcined temperature and calcined time also affect the photocatalytic activity of CdS/ZnS/TiO2 composite photocatalysts.
The high photocatalytic activity of the MS /TiO2 composites is attributed to the following two factors: the one is that TiO2 nano-powders make the target pollutants at a high concentration level around the surface of the composite photocatalysts because of their strong adsorption properties, thus the collision rate between pollutants and photocatalysts is increased; the other is the efficient separation of electron–hole pairs due to the existence of MS.
Both of the two factors cooperate and make the composite photocatalysts own good photocatalystic performance.
Sulfide photocatalysts have good light absorption properties and photocatalytic properties, but single sulfides are easy to appear light corrosion phenomenon and the photocatalytic efficiency is low [5,6].
The calcined temperature and calcined time also affect the photocatalytic activity of CdS/ZnS/TiO2 composite photocatalysts.
The high photocatalytic activity of the MS /TiO2 composites is attributed to the following two factors: the one is that TiO2 nano-powders make the target pollutants at a high concentration level around the surface of the composite photocatalysts because of their strong adsorption properties, thus the collision rate between pollutants and photocatalysts is increased; the other is the efficient separation of electron–hole pairs due to the existence of MS.
Both of the two factors cooperate and make the composite photocatalysts own good photocatalystic performance.
Online since: February 2024
Authors: Bernard Adaramola, Lawan Rominiyi, Taiwo Oluwasesan Oni, J.F. Eiche, O.T. Oginni, D.V. Ewere
Viscosity = reading obtained x (factor for the spindle speed comb
Biodiesel production from waste cooking oil: 1.Process design and technological assessment, Department of Chemical Engineering, University of Ottawa, Ottawa, Ont., Canada, Bioresource Technology 89: 1 [5] Mccormick R.L., Ratcliff, M , Moens, L and Lawrence, R., (2007): “Several factors affecting the stabilitry of Biodiesel in Standard Accelerated Tests”, Fuel Processing Technology, 88(7): 651 – 657 [6] Knothe, G., Bagby, M.O., and Ryan III, T.W.,(1998): “Precombustion of Fatty Acids and Esters of Biodiesel.
,Justiz-Smith N.(2012)Physico-chemical properties of Blighia sapida (ackee)oil extract and its potential application as emulsion base.
[20] Omosuli S.V.(2014), Physicochemical Properties and Fatty Acid Composition of Oil Extracted from Akee Apple (Blighia sapida) Seeds.
Chemical composition and physiochemical properties of cashew nut.
Biodiesel production from waste cooking oil: 1.Process design and technological assessment, Department of Chemical Engineering, University of Ottawa, Ottawa, Ont., Canada, Bioresource Technology 89: 1 [5] Mccormick R.L., Ratcliff, M , Moens, L and Lawrence, R., (2007): “Several factors affecting the stabilitry of Biodiesel in Standard Accelerated Tests”, Fuel Processing Technology, 88(7): 651 – 657 [6] Knothe, G., Bagby, M.O., and Ryan III, T.W.,(1998): “Precombustion of Fatty Acids and Esters of Biodiesel.
,Justiz-Smith N.(2012)Physico-chemical properties of Blighia sapida (ackee)oil extract and its potential application as emulsion base.
[20] Omosuli S.V.(2014), Physicochemical Properties and Fatty Acid Composition of Oil Extracted from Akee Apple (Blighia sapida) Seeds.
Chemical composition and physiochemical properties of cashew nut.
Online since: February 2018
Authors: Maruff Hussain, Dharmendra Singh, R. Jayaganthan, P. Nageswara Rao
Vickers hardness testing and tensile testing was employed to characterize the mechanical properties of the alloy with various thermo mechanical treatments.
In the present investigation NA for long time has influenced the mechanical properties of the alloy significantly.
In contrast Chang et al. [11] have reported positive effect of natural pre-ageing on the mechanical properties of Al-Mg-Si alloys.
Tensile properties The tensile properties of the Al 6061 alloy after different PA and NA treatments are presented in the figure 10(a).
Alloy with PA and NA has resulted superior mechanical properties over simple cryorolled material after solution treatment.
In the present investigation NA for long time has influenced the mechanical properties of the alloy significantly.
In contrast Chang et al. [11] have reported positive effect of natural pre-ageing on the mechanical properties of Al-Mg-Si alloys.
Tensile properties The tensile properties of the Al 6061 alloy after different PA and NA treatments are presented in the figure 10(a).
Alloy with PA and NA has resulted superior mechanical properties over simple cryorolled material after solution treatment.
Online since: October 2011
Authors: Ting Yu Chueh, Shu Lung Wang
The experimental configuration of this study was planned using Taguchi orthogonal array, where the drill diameter, rotation speed, power and feed rate were taken as the experimental factors.
The effect of control factors on the holes quality was discussed from the straightness deviation and maximum material removal rate of related factors on the holes when the Taguchi method was used in rotary ultrasonic machining of holes drilling.
Experimental results showed that cutting force direction might affect holes deviation on inclined plane of work pieces.
The experiment was done in three steps: first, four experimental parameters are chosen based on MRR affecting cutting operation, as shown in Table 1; second, three level values are given to each experimental parameter, and 9 groups of tests are carried out according to Orthogonal Array (OA) of L9 (32) chosen; third, mean value of Taguchi Method is used for analysis, and the characteristics of surface roughness of target function are converted into Signal Noise Ratio (S/N).
The contribution on MRR of every factor shows as in Table 3.
The effect of control factors on the holes quality was discussed from the straightness deviation and maximum material removal rate of related factors on the holes when the Taguchi method was used in rotary ultrasonic machining of holes drilling.
Experimental results showed that cutting force direction might affect holes deviation on inclined plane of work pieces.
The experiment was done in three steps: first, four experimental parameters are chosen based on MRR affecting cutting operation, as shown in Table 1; second, three level values are given to each experimental parameter, and 9 groups of tests are carried out according to Orthogonal Array (OA) of L9 (32) chosen; third, mean value of Taguchi Method is used for analysis, and the characteristics of surface roughness of target function are converted into Signal Noise Ratio (S/N).
The contribution on MRR of every factor shows as in Table 3.
Online since: December 2010
Authors: H.B. Zhao, Y.F. Nan
That is because: the main factors which affect the cutting force
are the material, cutting parameters, tool material, the tool geometry parameters, the cooling
conditions and the wear of the tool.
In which the work material's physical and the mechanical property are the greatest impact.
That is because, in the cutting process, the main factor affecting the tool life is the cutting heat.
(Mechanical Industry press, China 1996),p.87-103
(Mechanical Industry Press, China 1985) p.46-152
In which the work material's physical and the mechanical property are the greatest impact.
That is because, in the cutting process, the main factor affecting the tool life is the cutting heat.
(Mechanical Industry press, China 1996),p.87-103
(Mechanical Industry Press, China 1985) p.46-152
Online since: February 2014
Authors: Milan Palko
Specific properties of building envelope in energy passive standard.
However, it would be misleading to think that the indoor climate – external climate interaction is affected only by glazing area size considering the transparent parts of building envelope.
The correct solution of window structural parts and window embedding in building envelope is a relevant property of quality window.
Also other factors (e.g. aesthetic solution, possibility of additional clap-net application, etc.) are to be taken into consideration in the decision making process.
Considering all the factors the detail of window imbedding in building envelope was realized according to model 2.1.2 (Figure 8).
However, it would be misleading to think that the indoor climate – external climate interaction is affected only by glazing area size considering the transparent parts of building envelope.
The correct solution of window structural parts and window embedding in building envelope is a relevant property of quality window.
Also other factors (e.g. aesthetic solution, possibility of additional clap-net application, etc.) are to be taken into consideration in the decision making process.
Considering all the factors the detail of window imbedding in building envelope was realized according to model 2.1.2 (Figure 8).
Online since: September 2018
Authors: Charnnarong Saikaew, Phacharadit Paengchit
Cutting tool for the surface finish was mixed ceramic insert Al2O3+TiC (Tungaloy, Japan) with physical and mechanical properties as follows: transverse rupture strength of 0.9 GPa, modulus of elasticity of 400 GPa, hardness of 94 HRA, surface roughness of 0.101 µm, specific gravity of 4.35 and friction of around 0.25.
Identifying the important process factors: In this research work, there were two machining factors including cutting speeds of 150, 150, 220 m/min and feed rates of 0.06, 0.08, 0.1 mm/rev. 3.
Table 1 also shows contribution percentage of the factors and their interaction.
Analysis of variance and plots of main and interaction effects were successfully used to investigate the effects of the cutting factors and to determine an optimal operating condition of the statistically significant factors.
Both factors and their interaction were statistically significant at the level of significance of 0.05.
Identifying the important process factors: In this research work, there were two machining factors including cutting speeds of 150, 150, 220 m/min and feed rates of 0.06, 0.08, 0.1 mm/rev. 3.
Table 1 also shows contribution percentage of the factors and their interaction.
Analysis of variance and plots of main and interaction effects were successfully used to investigate the effects of the cutting factors and to determine an optimal operating condition of the statistically significant factors.
Both factors and their interaction were statistically significant at the level of significance of 0.05.
Online since: July 2020
Authors: Jana Toompuu, Toomas Rang, Mehadi Hasan Ziko, Ants Koel
Because of these properties, the most attractive applications of SiC-based devices can be used as the most attractive application area of high power, high frequency, high radiation, and high-temperature circumstances [3, 4].
However, promising properties of p-type SiC, which can be used for the fabrication of highly efficient power devices depending on the quality of the SiC layers and metal–SiC contacts, and have not accomplished yet their in full potential today.
Experimentally all rectifying properties of six (DWS# 2, 5, 6, 7, 8, 9) Al/4H-SiC SBDs are measured by Keithley 2400 source and measurement unit with LabVIEW program.
The observed changes in the (ΦB0) and (ND) are related to the interface layer formed by a thin oxide layer as a lattice defect affecting the interface region existing around the contact area near the Al film/p-4H-SiC.
Andreev, Electrical characteristics and structural properties of ohmic contacts to p-type 4H-SiC epitaxial layers, semiconductors volume 33 (1999)
However, promising properties of p-type SiC, which can be used for the fabrication of highly efficient power devices depending on the quality of the SiC layers and metal–SiC contacts, and have not accomplished yet their in full potential today.
Experimentally all rectifying properties of six (DWS# 2, 5, 6, 7, 8, 9) Al/4H-SiC SBDs are measured by Keithley 2400 source and measurement unit with LabVIEW program.
The observed changes in the (ΦB0) and (ND) are related to the interface layer formed by a thin oxide layer as a lattice defect affecting the interface region existing around the contact area near the Al film/p-4H-SiC.
Andreev, Electrical characteristics and structural properties of ohmic contacts to p-type 4H-SiC epitaxial layers, semiconductors volume 33 (1999)
Online since: July 2014
Authors: Xiao Hua Yang, Teng Chen, Xing Liu, Fang Wu Wu
The displacements of buildings near foundation pit are affected by many factors, such as the excavation speed and anchor.
The natural foundation bearing capacities of each soil layer and representative values of main properties in physical and mechanical are shown in table 1.
Table 1 Physico-mechanical parameters Geotechnical layer State Characteristic value of foundation bearing capacity [fak/kPa] Modulus of elasticity [Es/MPa] Internal friction Angle [Ф/°] Cohesion [C/kPa] Plain fill Losse-slightly dense 80 4.3 6.5 10.0 Silty clay Hard plastic 220 7.0 17.0 22.0 Silty clay Hard plastic 230 7.1 17.0 22.5 Silty clay Waxiness-soft plastic 120 4.8 10.0 16.0 Gravel with clay Moderate density 420 20.0 30.0 ∕ Limestone Slightly weathered 5000 The hydrogeological conditions of site are in moderate.
By observing horizontal displacements and settlements, it can effectively monitor the states of supporting structures and find abnormal phenomena in time. 2) During excavation, the maximum deformations appeared in middle part of sides and at corners of foundation pit. 3) There are many factors influenced settlements of buildings, such as distances from pit boundaries, arrangements of supporting piles, time effects and so on.
The natural foundation bearing capacities of each soil layer and representative values of main properties in physical and mechanical are shown in table 1.
Table 1 Physico-mechanical parameters Geotechnical layer State Characteristic value of foundation bearing capacity [fak/kPa] Modulus of elasticity [Es/MPa] Internal friction Angle [Ф/°] Cohesion [C/kPa] Plain fill Losse-slightly dense 80 4.3 6.5 10.0 Silty clay Hard plastic 220 7.0 17.0 22.0 Silty clay Hard plastic 230 7.1 17.0 22.5 Silty clay Waxiness-soft plastic 120 4.8 10.0 16.0 Gravel with clay Moderate density 420 20.0 30.0 ∕ Limestone Slightly weathered 5000 The hydrogeological conditions of site are in moderate.
By observing horizontal displacements and settlements, it can effectively monitor the states of supporting structures and find abnormal phenomena in time. 2) During excavation, the maximum deformations appeared in middle part of sides and at corners of foundation pit. 3) There are many factors influenced settlements of buildings, such as distances from pit boundaries, arrangements of supporting piles, time effects and so on.