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Online since: October 2010
Authors: Bao Guo Zhang, Ya Tao Mao, Ai Bing Yu, X. Li Tian, J.F. Yang, Fang Guo
It can be used to machine almost any hard, brittle and difficult-to-machine material, and is not
restricted for conductive properties of materials.
Aimed at the disadvantages of above design and synthetically considered the two factors of cost and efficiency, this improvement has been done from the structure design of electrode and nozzle and the design of cycle cooling method, as shown in Fig. 8.
Only for machining techniques, the choice of machining parameters is profoundly influenced by many factors, such as different materials (ceramic, hard multiplex steel, etc.), different shapes (plane, abnormity surface, etc.), and different locations (center, margin, corner, etc.).
Furthermore, the mechanical properties of machined materials need be examined, the machining mechanism can't be understood completely and the accessories of the MDAM system need be also improved aftertime.
Zhang: China Mechanical Engineering, Vol. 20(2009): p. 2567-2570 [3] W.J.
Aimed at the disadvantages of above design and synthetically considered the two factors of cost and efficiency, this improvement has been done from the structure design of electrode and nozzle and the design of cycle cooling method, as shown in Fig. 8.
Only for machining techniques, the choice of machining parameters is profoundly influenced by many factors, such as different materials (ceramic, hard multiplex steel, etc.), different shapes (plane, abnormity surface, etc.), and different locations (center, margin, corner, etc.).
Furthermore, the mechanical properties of machined materials need be examined, the machining mechanism can't be understood completely and the accessories of the MDAM system need be also improved aftertime.
Zhang: China Mechanical Engineering, Vol. 20(2009): p. 2567-2570 [3] W.J.
Online since: September 2013
Authors: Ying Hui Cui, Jian Kun Liu, Peng Lv
The dynamic parameters directly affect the correctness of engineering design and numerical simulation.
Now domestic scholars generally test the dynamic properties of permafrost through triaxial tests.
The physical properties of silty clay are presented in Table 1.
The physical properties of the soil samples are shown in Table 1 , and particle size distribution in Table 3.
Conclusion The dynamic properties of the frozen soil had become an emergent subject which needs further research.
Now domestic scholars generally test the dynamic properties of permafrost through triaxial tests.
The physical properties of silty clay are presented in Table 1.
The physical properties of the soil samples are shown in Table 1 , and particle size distribution in Table 3.
Conclusion The dynamic properties of the frozen soil had become an emergent subject which needs further research.
Online since: June 2012
Authors: Han Lian Liu, Chuan Zhen Huang, Bin Zou, Hong Tao Zhu, Qing Ge Zhang
Table 1 Factors and levels of orthogonal design
Factors
v[m/min]
fz[mm/z]
ap[mm]
ae[mm]
Level 1
120
0.08
0.6
16
Level 2
160
0.12
0.9
24
Level 3
200
0.16
1.2
32
Level 4
240
0.2
1.5
40
Results and discussion
Surface roughness.
The level of other factors can be decided with consideration of other performance measure.
Fig. 1 Relationship between roughness and four factors Cutting force.
The influence of every level of all the factors on the cutting force can be seen in Fig. 2.
Fig. 2 Relationship between cutting force and four factors The factors that can affect cutting force in face milling include cutter geometries, work piece properties and all kinds of cutting parameters, so it is difficult to build accurate cutting force model for the face milling process.
The level of other factors can be decided with consideration of other performance measure.
Fig. 1 Relationship between roughness and four factors Cutting force.
The influence of every level of all the factors on the cutting force can be seen in Fig. 2.
Fig. 2 Relationship between cutting force and four factors The factors that can affect cutting force in face milling include cutter geometries, work piece properties and all kinds of cutting parameters, so it is difficult to build accurate cutting force model for the face milling process.
Online since: June 2005
Authors: Cheol Ho Lim, Ki Tae Kim, Young Sup Lee, C.H. Lee, Yong Hwan Kim, Dong Choul Cho
In the powder metallurgy, even if material was chosen, the carrier mobility and
thermal transport property is changed by several factors such as pore, particle boundary and oxide
layers.
Thermoelectric properties of the spark plasma sintered samples.
Bi2Te3-based single crystals show anisotropy in thermoelectric properties.
Anisotropy of thermoelectric properties.
Such anisotropy of thermoelectric properties is also confirmed from XRD pattern.
Thermoelectric properties of the spark plasma sintered samples.
Bi2Te3-based single crystals show anisotropy in thermoelectric properties.
Anisotropy of thermoelectric properties.
Such anisotropy of thermoelectric properties is also confirmed from XRD pattern.
Online since: February 2020
Authors: Yeong Maw Hwang, Zhong Zhou Xu, Sheng Liang Lin
Venugopal et al. [3] used the Taguchi method to discuss the effects of punch die angle, expansion ratio and friction conditions and found the most significant factor affecting the finished product is the punch die angle.
Table 1 is the mechanical properties of the tube material obtained from the fitted curve.
Fig. 2 Flow stress curve of aluminum alloy A6063 tube Table 1 Mechanical properties of aluminum alloy A6063 Material Aluminum alloy A6063 Yield strength,(MPa) 79 Ultimate tensile strength ,UTS (MPa) 100 Material strength coefficient, K (MPa) 266 Strain hardening exponent, n 0.801 Young's modulus, E (GPa) 64.7 Finite Element Analysis The die design for single pass of end forming including folding and expansion is discussed in this section.
The forming is conducted at room temperature and lubrication oil is used at the interface of the tube and dies, therefore, a constant shear friction factor of m=0.12 is adopted in the FE simulations.
Martins, Joining of tubes by internal mechanical locking, J.
Table 1 is the mechanical properties of the tube material obtained from the fitted curve.
Fig. 2 Flow stress curve of aluminum alloy A6063 tube Table 1 Mechanical properties of aluminum alloy A6063 Material Aluminum alloy A6063 Yield strength,(MPa) 79 Ultimate tensile strength ,UTS (MPa) 100 Material strength coefficient, K (MPa) 266 Strain hardening exponent, n 0.801 Young's modulus, E (GPa) 64.7 Finite Element Analysis The die design for single pass of end forming including folding and expansion is discussed in this section.
The forming is conducted at room temperature and lubrication oil is used at the interface of the tube and dies, therefore, a constant shear friction factor of m=0.12 is adopted in the FE simulations.
Martins, Joining of tubes by internal mechanical locking, J.
Online since: January 2019
Authors: S.V. Krymskiy, Michael Markushev, Oleg Sitdikov, Rafis Ilyasov, Elena Avtokratova, Anastasia Khazgalieva
Such a processing of pure metals and alloys usually results in well-developed deformation structures, involving nanocrystalline (NC) structures, and could accompanied by enhancement of their strength, as also of a number (balance) of physical and mechanical properties [18-21].
Microalloying of aluminum alloys with rare earth or transition metals was discovered as an effective method to control their microstructure and properties [24].
Two main factors caused formation of such a structure.
Thus, factors determining aluminum alloys corrosion behavior, are commonly divided on structural and phase ones.
The effect of cryorolling was conditioned by synergy effect of factors mentioned above.
Microalloying of aluminum alloys with rare earth or transition metals was discovered as an effective method to control their microstructure and properties [24].
Two main factors caused formation of such a structure.
Thus, factors determining aluminum alloys corrosion behavior, are commonly divided on structural and phase ones.
The effect of cryorolling was conditioned by synergy effect of factors mentioned above.
Online since: January 2014
Authors: Xiao Ping Zheng, Rong Hua Zhang, Biao Wu
Because the Ti-6Al-4V alloy is heat treatable alloys, microstructure and mechanical properties can be improved by proper heat treatment, in the application of titanium alloy, Ti-6Al-4V alloy is the most widely used, the yield is the largest, accounting for about 60% of the world's total output of titanium alloy.
Microstructure and properties of Ti-6Al-4V alloy have been reported more[4-6], but reports on solid phase transformation involving Ti-6Al-4V alloy during cooling are poorly understood, due to solid phase transformation of Ti-6Al-4V alloy during cooling directly affects the final microstructure and properties.
By the test of the DSC curve can obtain Ti-6Al-4V alloy during cooling of β1→α+ β2 phase change transition temperature and time, with the doctor Deloy Ozawa equation[7]: logB= logAE[RF(x)]-1-2.315-04567E(R.T)-1 calculate β1→α+β2 shift to activate, type: E to shift to activate, B as the heating rate, F (x) as phase transition function, T is temperature, for gas constant R, A frequency factor, x as the phase volume fraction, when x is constant, logAE/RF(x)-1 as a constant.
Effect of low temperature thermo-mechanical treatment on microstructures and mechanical properties of TC4 alloy [J].
Heat-treated microstructure and mechanical properties of TC4 alloy [J].
Microstructure and properties of Ti-6Al-4V alloy have been reported more[4-6], but reports on solid phase transformation involving Ti-6Al-4V alloy during cooling are poorly understood, due to solid phase transformation of Ti-6Al-4V alloy during cooling directly affects the final microstructure and properties.
By the test of the DSC curve can obtain Ti-6Al-4V alloy during cooling of β1→α+ β2 phase change transition temperature and time, with the doctor Deloy Ozawa equation[7]: logB= logAE[RF(x)]-1-2.315-04567E(R.T)-1 calculate β1→α+β2 shift to activate, type: E to shift to activate, B as the heating rate, F (x) as phase transition function, T is temperature, for gas constant R, A frequency factor, x as the phase volume fraction, when x is constant, logAE/RF(x)-1 as a constant.
Effect of low temperature thermo-mechanical treatment on microstructures and mechanical properties of TC4 alloy [J].
Heat-treated microstructure and mechanical properties of TC4 alloy [J].
Online since: November 2015
Authors: Gabriela Strnad, Laszlo Jakab-Farkas, Nicolae Chirila
Titanium alloys are standard materials in dental implants providing a combination of mechanical strength, chemical stability and biocompatibility [1,2,3,4,5,6].
The main factors influencing the biocompatibility of biomaterials are chemical composition, mechanical properties, electrical charges, and surface features [4].
Palmquist, Dental implant surfaces – psysicochemical properties, biological performance and trends, in Implant dentistry – a rapidly evolving practice, InTech (2011) 19-56
[4] C.N.Elias, Factors affecting the success of dental implants, in Implant dentistry – a rapidly evolving practice, InTech (2011) 319-364
Santoro, Characterization of Ti and Ti6Al4V surfaces after mechanical and chemical treatments: a rational approach to the design of biomedical devices, J.
The main factors influencing the biocompatibility of biomaterials are chemical composition, mechanical properties, electrical charges, and surface features [4].
Palmquist, Dental implant surfaces – psysicochemical properties, biological performance and trends, in Implant dentistry – a rapidly evolving practice, InTech (2011) 19-56
[4] C.N.Elias, Factors affecting the success of dental implants, in Implant dentistry – a rapidly evolving practice, InTech (2011) 319-364
Santoro, Characterization of Ti and Ti6Al4V surfaces after mechanical and chemical treatments: a rational approach to the design of biomedical devices, J.
Online since: July 2015
Authors: Ismail bin Bakar, Adnan bin Zainorabidin, Nursyahidah binti Saedon, Nurul Farhana bt Mohd Seth
These two main factors may be based on the characteristics of the soil itself.
This study is focused on its physical properties and shrinkage measurement.
There are two main factors poses as a challenge to engineers when they deal with this type of soil [1].
The content of peat soils differs from locations due to the factors such as temperature and degree of humification.
Mechanical Properties of Peat.
This study is focused on its physical properties and shrinkage measurement.
There are two main factors poses as a challenge to engineers when they deal with this type of soil [1].
The content of peat soils differs from locations due to the factors such as temperature and degree of humification.
Mechanical Properties of Peat.
Online since: October 2019
Authors: Alexis Daniel Negrea, Claudiu Nicolicescu, Ileana Nicoleta Popescu, Mihǎiţǎ Nicolae Ardeleanu, Carmen Otilia Rusǎnescu
This interest is motivated by the qualities of these parts, which besides the reduced mass [1] (three times smaller than the materials of Fe, Ni or Cu) ensure good thermal and electrical conductivity [2], high mechanical and corrosion resistance, wear resistance [3], damping properties vibration and low expansion coefficient [4] compared to other types of metallic materials.
Powder mixtures compaction behavior can be quantitatively expressed by densification equations that describe the relationship between densities - applied pressure during the compaction stages, using correction factors [5].
Zhou et. al [10] observed that lubricant affects the powder deformation and rearrangement densification mechanisms during the powder die compaction process.
The pressing densification of Al-SiC powder mixture and corresponding properties of the compacts are influenced by the packing state, size and number of SiC particles in the initial packing structure [10].
Wang and al. [12] highlight the effects of the Al content and compaction pressure on the relative density and stress distribution and result of the different initial packing structures and on the properties of the compact.
Powder mixtures compaction behavior can be quantitatively expressed by densification equations that describe the relationship between densities - applied pressure during the compaction stages, using correction factors [5].
Zhou et. al [10] observed that lubricant affects the powder deformation and rearrangement densification mechanisms during the powder die compaction process.
The pressing densification of Al-SiC powder mixture and corresponding properties of the compacts are influenced by the packing state, size and number of SiC particles in the initial packing structure [10].
Wang and al. [12] highlight the effects of the Al content and compaction pressure on the relative density and stress distribution and result of the different initial packing structures and on the properties of the compact.