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Online since: January 2014
Authors: Maria E.R. Cronemberger, Renato de Mendonça, Maria Gabriela Nogueira Campos, Erika C. Trindade Ramos, Neide A. Mariano, Sylma Carvalho Maestrelli
These intermetallic phases decrease the corrosion resistance significantly, and their compounds affect the mechanical properties, because causes an uneven distribution of alloying elements [6,7].
The study concerns the influence of solution annealing parameters (time and cooling rates) on the microstructure and mechanical properties of a duplex stainless steel.
Among the treatment parameters analyzed, it was observed that for longer treatments, the cooling rate is an important factor to define the microstructure of the steel.
Welding processes, microstructural evolution and final properties of duplex and superduplex stainlees steels (edited by I.
Alvarez-Armas: Recent Patents on Mechanical Engineering Vol. 1 (2008), p. 51
The study concerns the influence of solution annealing parameters (time and cooling rates) on the microstructure and mechanical properties of a duplex stainless steel.
Among the treatment parameters analyzed, it was observed that for longer treatments, the cooling rate is an important factor to define the microstructure of the steel.
Welding processes, microstructural evolution and final properties of duplex and superduplex stainlees steels (edited by I.
Alvarez-Armas: Recent Patents on Mechanical Engineering Vol. 1 (2008), p. 51
Online since: May 2011
Authors: Yin Cheng, Zhan Guo Li, Dong Wang, Jian Xin Zhang, Xin Huang
The influence caused by chemical character factors in soils.
Because of the influence caused by chemical factors such as PH, soluble salts, ion exchange capacity, active silicon (Al) content in soil, the hydration and hardening process of stabilizer are affected, it causes the hydrates aren’t produced fully, so the strength development of stabilized soil is limited.
The research has shown that[11]: Although the chemical properties of soil sample are various, and different soil samples are also various, but the ultimate performance of these differece in the soil is only expressed on the solution of Ca(OH)2 (CH) in stabilized soil, further expressed on the effect of quantity of formed hydrates by the concentration of the CH.
Therefore, the harmful influence of various chemical factors in soil can be eliminated by measures which can enhance Ca(OH)2 concentration in stabilized soil.
The percentage of components of stabilizer and the strength of stabilized soil(qu) are listed in Tab.1( the percentage of components in Tab.1 are the mass ratio of component and wet soil), the mechanical properties of soil sample and the chemical composition of industrial wastes are list in Tab.2 and Tab.3 respectively.
Because of the influence caused by chemical factors such as PH, soluble salts, ion exchange capacity, active silicon (Al) content in soil, the hydration and hardening process of stabilizer are affected, it causes the hydrates aren’t produced fully, so the strength development of stabilized soil is limited.
The research has shown that[11]: Although the chemical properties of soil sample are various, and different soil samples are also various, but the ultimate performance of these differece in the soil is only expressed on the solution of Ca(OH)2 (CH) in stabilized soil, further expressed on the effect of quantity of formed hydrates by the concentration of the CH.
Therefore, the harmful influence of various chemical factors in soil can be eliminated by measures which can enhance Ca(OH)2 concentration in stabilized soil.
The percentage of components of stabilizer and the strength of stabilized soil(qu) are listed in Tab.1( the percentage of components in Tab.1 are the mass ratio of component and wet soil), the mechanical properties of soil sample and the chemical composition of industrial wastes are list in Tab.2 and Tab.3 respectively.
Online since: November 2015
Authors: Aurelian Albut
Since the springback is also affected by the material properties, such as Young’s modulus and initial yield stress, the process design for magnesium sheets is more complicated due to low formability.
Different orientation of the rolling direction with respect to the deformation direction Experimental Tests In the first stage of experimental research, tensile tests have been carried out to determine the mechanical properties of the magnesium alloy AZ31 in order to use them as input for simulations.
The forming force was generated using a mechanical tensile test machine.
When properly used, simulation by finite element method can be considered a valuable tool in the study of the influencing factors of the springback phenomenon able to offer accurate data even from the design stage.
Chirita, Factors of influence on the springback of formed metal sheets, ESAFORM The 5th International Conference on Material Forming, Krakow, Poland, 2002.
Different orientation of the rolling direction with respect to the deformation direction Experimental Tests In the first stage of experimental research, tensile tests have been carried out to determine the mechanical properties of the magnesium alloy AZ31 in order to use them as input for simulations.
The forming force was generated using a mechanical tensile test machine.
When properly used, simulation by finite element method can be considered a valuable tool in the study of the influencing factors of the springback phenomenon able to offer accurate data even from the design stage.
Chirita, Factors of influence on the springback of formed metal sheets, ESAFORM The 5th International Conference on Material Forming, Krakow, Poland, 2002.
Online since: June 2011
Authors: S. Hasan, S. Thamizhmanii, Rosli Ahmad
All these factors also contribute to the values of the cutting forces.
CBN and PCBN tools possess excellent mechanical properties such as high temperature strength, ability to maintain its shape at high temperature and hardness second to diamond [3].
The chemical and mechanical properties are shown in the tables 1 and 2 respectively. 1.2 Turning tests The turning experiments were conducted using on N.C.
Cr Mo P S AISI 440 C 0.95-1.20. 1.00 1.00 16-18 0.75 max. 0.04 0.03 Table 2: Mechanical properties of AISI 440 C.
The notch wear formed at the end of the tests. 1.4 Results and discussion on cutting forces A force is required to deform the material plastically and it is sensitive to certain factors.
CBN and PCBN tools possess excellent mechanical properties such as high temperature strength, ability to maintain its shape at high temperature and hardness second to diamond [3].
The chemical and mechanical properties are shown in the tables 1 and 2 respectively. 1.2 Turning tests The turning experiments were conducted using on N.C.
Cr Mo P S AISI 440 C 0.95-1.20. 1.00 1.00 16-18 0.75 max. 0.04 0.03 Table 2: Mechanical properties of AISI 440 C.
The notch wear formed at the end of the tests. 1.4 Results and discussion on cutting forces A force is required to deform the material plastically and it is sensitive to certain factors.
Online since: June 2014
Authors: Jia Tang, Qiang Li, Qin Zhang
Ye Qunfeng[6] of UASB reactor were preliminary numerical simulation of single-phase flow, factors for treatment effects of reaction, the flow characteristics through the simulation of the whole flow field in the reactor, and provide the basis for the optimization design.
The model can be used to describe the change in different regions of the physical properties of each of the UASB reactor.
Sedimentation performance of activated sludge is an important factor influencing the anaerobic reactor design, operation and control, directly affect the reactor solid-liquid separation, thereby affecting the effluent quality reactor.
Were investigated under different influent flow anaerobic reactor velocity field, pressure field and the turbulent properties.
CFD simulation of mechanical draft tube mixing in anaerobic digester tanks[J].Water Research, 2009 (43):1040-1050.
The model can be used to describe the change in different regions of the physical properties of each of the UASB reactor.
Sedimentation performance of activated sludge is an important factor influencing the anaerobic reactor design, operation and control, directly affect the reactor solid-liquid separation, thereby affecting the effluent quality reactor.
Were investigated under different influent flow anaerobic reactor velocity field, pressure field and the turbulent properties.
CFD simulation of mechanical draft tube mixing in anaerobic digester tanks[J].Water Research, 2009 (43):1040-1050.
Online since: July 2014
Authors: Yuan Sheng Zhai, Bao Tao Wang, Xian Li Liu
The maximum height is 5.8m and the maximum weight o reaches more than 500 tons. 2.25Cr-1Mo-0.25V steel is one kind of manufacturing material used in the manufacture of cylinder with the properties of high strength, plasticity and adhesion.
In the rough machining of cylinder, analysis of the stress state is a major factor that affects the cutting performance.
Assumption of turning process is as follows: a) Workpiece is the isotropic continuous solid medium with isotropic hardening elastoplastic and its mechanical properties changes with the temperature.
The mechanical properties of 2.25Cr-1Mo-0.25V steel are shown in Table 1.
Table 1 The mechanical properties of 2.25Cr-1Mo-0.25V steel (room temperature) σb (MPa) σ0.2(MPa) δ4(%) ψ(%) HB 585~760 415~620 ≥18 ≥46 195~235 Numerical simulation loading of turning tool strength.
In the rough machining of cylinder, analysis of the stress state is a major factor that affects the cutting performance.
Assumption of turning process is as follows: a) Workpiece is the isotropic continuous solid medium with isotropic hardening elastoplastic and its mechanical properties changes with the temperature.
The mechanical properties of 2.25Cr-1Mo-0.25V steel are shown in Table 1.
Table 1 The mechanical properties of 2.25Cr-1Mo-0.25V steel (room temperature) σb (MPa) σ0.2(MPa) δ4(%) ψ(%) HB 585~760 415~620 ≥18 ≥46 195~235 Numerical simulation loading of turning tool strength.
Online since: August 2013
Authors: Andrzej Nowotnik, Ekaterina Rzyankina, Nawaz Mahomed, Dariusz Szeliga
The results obtained were used as a basis for verification of imposed boundary conditions, heat coefficients physical materials factors, nucleation and grains growth coefficients that were used in the numerical simulations.
Diffraction Analysis for Single Crystal structures The properties of SX superalloys are highly dependent on their crystallographic direction.
Hence the assessment of crystallographic orientation is the basis to determining the mechanical properties.
This is primarily evident in terms of the primary dendrite arm spacing, which affects both the propensity for casting defects and the final mechanical properties.
Mechanical creep test investigations have shown improved properties for the samples with withdrawal velocity of 3 mm/min, compared to those with withdrawal velocities of 1 mm/min and 5 mm/min.
Diffraction Analysis for Single Crystal structures The properties of SX superalloys are highly dependent on their crystallographic direction.
Hence the assessment of crystallographic orientation is the basis to determining the mechanical properties.
This is primarily evident in terms of the primary dendrite arm spacing, which affects both the propensity for casting defects and the final mechanical properties.
Mechanical creep test investigations have shown improved properties for the samples with withdrawal velocity of 3 mm/min, compared to those with withdrawal velocities of 1 mm/min and 5 mm/min.
Online since: April 2024
Authors: Ria Grace P. Abdon, Shanlaine F. Barbastro, Kian James C. Francisco, Cedric John D. Quicay
It also aims to produce a quality printout and compare its mechanical properties with a commercial filament, polylactic acid (PLA).
Table 4 shows the mechanical properties acquired by both rPP and PLA filaments whereas PLA exacerbated higher results in most of the mechanical properties.
Mechanical properties of PLA-graphene filament for FDM 3D printing.
Comparison of mechanical properties of PLA and ABS based structures produced by fused deposition modeling additive manufacturing.
Comparison of mechanical properties of PLA and ABS based structures produced by fused deposition modeling additive manufacturing.
Table 4 shows the mechanical properties acquired by both rPP and PLA filaments whereas PLA exacerbated higher results in most of the mechanical properties.
Mechanical properties of PLA-graphene filament for FDM 3D printing.
Comparison of mechanical properties of PLA and ABS based structures produced by fused deposition modeling additive manufacturing.
Comparison of mechanical properties of PLA and ABS based structures produced by fused deposition modeling additive manufacturing.
Online since: June 2025
Authors: Kushal Sharma, Vimal Kumar Joshi, Deepika Garg, Sunil Sunil
The advanced machinery frequently faces heating problems due to friction or slow heat dissipated properties of conventional fluids, which results in device failure.
Physical Properties of the MNF: FC-72 and 90G.
Properties FC-72 (Li et al. [17]) 90 G (Tangthieng et al. [18]) Base Fluids Fluorocarbon (Perfluorohexane C6F14) Hydrocarbon Density (kg/ m3 ) 1.680×103 0.972×103 Coefficient of Thermal Expansion (1/ K) 1.6×10-3 9.0×10-4 Dynamical Viscosity in Zero Magnetic Field (kg/ ms) 6.4×10-4 15.0×10-3 Thermal diffusivity (m2/s) 3.084×10-8 8.700×10-8 Prandtl number 12.3 176.4 Mathematical Modelling The factors affecting viscous fluids are volume fraction, temperature, depth, pressure, density, etc.
The mathematical expression of the impact on uniform viscosity μ∞ is expressed as [19, 20], μ(T, z)=μ∞1-αz1+αT-T∞ , (1) where α≥0 is the affecting factor.
International Journal of Mechanical Sciences, 90 (2015) 246-250
Physical Properties of the MNF: FC-72 and 90G.
Properties FC-72 (Li et al. [17]) 90 G (Tangthieng et al. [18]) Base Fluids Fluorocarbon (Perfluorohexane C6F14) Hydrocarbon Density (kg/ m3 ) 1.680×103 0.972×103 Coefficient of Thermal Expansion (1/ K) 1.6×10-3 9.0×10-4 Dynamical Viscosity in Zero Magnetic Field (kg/ ms) 6.4×10-4 15.0×10-3 Thermal diffusivity (m2/s) 3.084×10-8 8.700×10-8 Prandtl number 12.3 176.4 Mathematical Modelling The factors affecting viscous fluids are volume fraction, temperature, depth, pressure, density, etc.
The mathematical expression of the impact on uniform viscosity μ∞ is expressed as [19, 20], μ(T, z)=μ∞1-αz1+αT-T∞ , (1) where α≥0 is the affecting factor.
International Journal of Mechanical Sciences, 90 (2015) 246-250
Online since: September 2014
Authors: Plato Kapranos, Reza Haghayeghi
It appears that by applying magnetic forces above the liquidus temperature, shearing effects result in finer grain sizes and consequent enhancement of properties.
By reducing the grain size not only mechanical properties are improved but also casting defects such as hot tearing susceptibility or macro-segregation are limited [1].
However, through the use of chemical refiners some undesired intermetallic compounds are produced, the chemical composition is changed and most of the above particles can turn into impurities adversely affecting the mechanical properties.
Recently, the AA7075 aluminium alloy has attracted attention due to its mechanical properties and various investigators have studied the possibility of processing this alloy in the semisolid state [4, 5, 6].
John [7] suggested that the growth restriction factor could be the reason of grain refinement but did not offer any ideas about the nature of nuclei.
By reducing the grain size not only mechanical properties are improved but also casting defects such as hot tearing susceptibility or macro-segregation are limited [1].
However, through the use of chemical refiners some undesired intermetallic compounds are produced, the chemical composition is changed and most of the above particles can turn into impurities adversely affecting the mechanical properties.
Recently, the AA7075 aluminium alloy has attracted attention due to its mechanical properties and various investigators have studied the possibility of processing this alloy in the semisolid state [4, 5, 6].
John [7] suggested that the growth restriction factor could be the reason of grain refinement but did not offer any ideas about the nature of nuclei.