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Online since: June 2010
Authors: Nor Hafiez Mohamad Nor, Sufizar Ahmad, Mohd Halim Irwan Ibrahim, Khairur Rijal Jamaludin, Norhamidi Muhamad, Mohd Ruzi Harun
The goal of this research is to optimize the green strength properties of Titanium alloy Ti-6Al-4V
in the injection molding stage by mixing with palm stearin (PS) binder system.
The total DOF for six factors, each at three levels and three interactions is 22.
Thus, without considering any interaction the result is a combination of A2, B1, C0, D1, E2 and F2 as the best set of factors.
It shows that any changes of these factors simultaneously will affect the green density.
Factor D, factor F and all interaction factors are not significant affecting for high green density even though it give contribution during injection molding but the confidence level are less than 90%.
The total DOF for six factors, each at three levels and three interactions is 22.
Thus, without considering any interaction the result is a combination of A2, B1, C0, D1, E2 and F2 as the best set of factors.
It shows that any changes of these factors simultaneously will affect the green density.
Factor D, factor F and all interaction factors are not significant affecting for high green density even though it give contribution during injection molding but the confidence level are less than 90%.
Online since: May 2020
Authors: Martin Necpal, Maria Kapustova, Maroš Martinkovič
The reliable results of the forming process affect these factors [2]:
· dimension and material formability of input feedstock,
· the technological parameter of forming (drawing velocity, method of lubrication and type of lubricant)
· the geometry of the forming tools (rifled mandrel)
There are several approaches on how to predict factors that influence of the forming process.
Using FEM analyses to determine the initial tube size that gives the appropriate mechanical properties after drawing can be found in some works [7].
As the temperature stays lower in cold drawing, the forming material properties do not vary and can, therefore, be supposed to be independent of the temperature variation.
Using FEM analyses to determine the initial tube size that gives the appropriate mechanical properties after drawing can be found in some works [7].
As the temperature stays lower in cold drawing, the forming material properties do not vary and can, therefore, be supposed to be independent of the temperature variation.
Online since: January 2005
Authors: Zhan Ling Zhang, Liu Shuan Yang, Feng Ni
Introduction
Zinc-aluminum alloy ZA27 has many outstanding advantages, such as superior mechanical
properties, excellent tribological properties, relatively lower density and benign machinability.
Many factors affect the solidification.
In order to model the mathematical treatment, the secondary factors were neglected and some assumptions are made: (1) The liquid metal filled the mold instantly, and the filling process was neglected
Many factors affect the solidification.
In order to model the mathematical treatment, the secondary factors were neglected and some assumptions are made: (1) The liquid metal filled the mold instantly, and the filling process was neglected
Online since: October 2011
Authors: Hong Gao, Zhi Qiang Hu, De Feng Huang, Xian Qing Liu, Hong Shun Hao
The results indicated that when the ratio of 3-methoxypropionitrile to sulfolane achieves 3:2, the cell showed the optimal photoelectric properties and stability, and the short-circuit current and photoelectric conversion efficiency achieved 7.58mA/cm2 and 2.79%, respectively.
The effects of sulfolane on potoelectric properties and stability of DSSCs were studied.
Another reason could be the reduced electrolyte conductivity, which increased the internal resistance of DSSC, thus reduced the fill factor and the photoelectric conversion efficiency.
The increased of the fill factor was induced by the sulfolane with the TiO2 film formed a stable transfer channel for electrons and reduced the internal resistance of the cell.
The measurement of DSSCs indicated that when the ratio of 3-methoxypropionitrile to sulfolane as mixture solvent for electrolyte is 3:2, the cell has the optimal photoelectric properties, the short-circuit current of 7.58mA/cm2 and the photoelectric conversion efficiency of 2.79% were achieved.
The effects of sulfolane on potoelectric properties and stability of DSSCs were studied.
Another reason could be the reduced electrolyte conductivity, which increased the internal resistance of DSSC, thus reduced the fill factor and the photoelectric conversion efficiency.
The increased of the fill factor was induced by the sulfolane with the TiO2 film formed a stable transfer channel for electrons and reduced the internal resistance of the cell.
The measurement of DSSCs indicated that when the ratio of 3-methoxypropionitrile to sulfolane as mixture solvent for electrolyte is 3:2, the cell has the optimal photoelectric properties, the short-circuit current of 7.58mA/cm2 and the photoelectric conversion efficiency of 2.79% were achieved.
Online since: April 2009
Authors: Carmen Andrade, Esperanza Menéndez, José de Frutos
In both the cases,
but especially in the second one, the mechanical characteristics of the mortar are affected [1, 3, 4].
Unfortunately, some significant factors, such as the porosity of cement paste, which could affect EIS features, have not been involved.
We have also modelized the electrical response of these materials, considering both the state of mortars as the degree of damage on them and their loss of mechanical properties.
But this minority phase, by the action of freeze-thawing cycles, is the part of the material that is degraded, and hence causing the loss of mechanical properties of the material.
Concrete, Structure, Properties, and Materials.
Unfortunately, some significant factors, such as the porosity of cement paste, which could affect EIS features, have not been involved.
We have also modelized the electrical response of these materials, considering both the state of mortars as the degree of damage on them and their loss of mechanical properties.
But this minority phase, by the action of freeze-thawing cycles, is the part of the material that is degraded, and hence causing the loss of mechanical properties of the material.
Concrete, Structure, Properties, and Materials.
Online since: January 2014
Authors: Agus Sigit Pramono, Wajan Berata, Susila Candra, I Made Londen Batan
In this study, the mechanical properties of the material were chosen since that they equivalent to those of low carbon steel with its thickness of 0.2 mm, k = 572 N/mm2, UTS = 391 N/mm2, yield stress = 309 N/mm2 and n = 0.2.
A larger gap could increase a material flow in tangential direction, and a magnitude of tangential stresses, consequently this condition would affect a wrinkling in the flange.
Blank holder force is not being set by close loop control system by considering all the factors that lead to wrinkling and cracking.
Start Initial Blank Holder force Material properties, punch and die dimension, friction coefficient, velocity of punch stroke = 1 mm/s n =1 second Punch stroke to m = velocity x n To calculate radial stress, Deep Drawing force, tangential stress and “Gap” on “m” punch stroke To increase the blank holder force GAP< 130%-180% x Initial thickness of material (<0.26mm) To decrease Blank Holder Force (b) Fd[8] Muammer Gavas, Increasing the drawing height of conical square cups using anti-lock braking system (ABS), Journal of Mechanical Science and Technology 23 page3079~3087, 2009
A larger gap could increase a material flow in tangential direction, and a magnitude of tangential stresses, consequently this condition would affect a wrinkling in the flange.
Blank holder force is not being set by close loop control system by considering all the factors that lead to wrinkling and cracking.
Start Initial Blank Holder force Material properties, punch and die dimension, friction coefficient, velocity of punch stroke = 1 mm/s n =1 second Punch stroke to m = velocity x n To calculate radial stress, Deep Drawing force, tangential stress and “Gap” on “m” punch stroke To increase the blank holder force GAP< 130%-180% x Initial thickness of material (<0.26mm) To decrease Blank Holder Force (b) Fd
Online since: May 2004
Authors: C. Bindal, S.C. Okumuş, A. Sukran Demirkıran, Suleyman Yılmaz
However, since a single material can hardly satisfy all these requirements, materials of
different properties are being combined.
Some properties of fly ash and Al powders such as particle size and composition are given in Table 1.
Properties of powders used in coating.
Inhomogeneties such as porosity, unmelted and semi-melted particles and inclusions which exist atmospheric plasma spray coatings, affect microhardness properties.
Mechanical properties of the thermal spray coatings generally influenced by the inhomogenities and process-induced residual stresses.
Some properties of fly ash and Al powders such as particle size and composition are given in Table 1.
Properties of powders used in coating.
Inhomogeneties such as porosity, unmelted and semi-melted particles and inclusions which exist atmospheric plasma spray coatings, affect microhardness properties.
Mechanical properties of the thermal spray coatings generally influenced by the inhomogenities and process-induced residual stresses.
Online since: November 2012
Authors: Qi Xiao, Zhuo Li, Xiao Hai Xu
Introduction
The Chinese southeast coastal region is one of the areas which worst affected by strong winds in the world.
Large structure ansys software considering the material, geometric and state nonlinear at same time is using for creation and mechanical behavior ansys of the model of composite joint.
In order to study the mechanical properties of gusset plate and failure mode, the method of equal stress loading on the angle end is using.
Reinforcement scheme Transmission tower as one of the main components of the transmission line, after years of use, often because the load increasing or other factors need to reinforce.
The tower has been unable to meet the practical operation demand. 2 The end of the Angle is the most unfavorable mechanical parts, belong to the node board weak position.
Large structure ansys software considering the material, geometric and state nonlinear at same time is using for creation and mechanical behavior ansys of the model of composite joint.
In order to study the mechanical properties of gusset plate and failure mode, the method of equal stress loading on the angle end is using.
Reinforcement scheme Transmission tower as one of the main components of the transmission line, after years of use, often because the load increasing or other factors need to reinforce.
The tower has been unable to meet the practical operation demand. 2 The end of the Angle is the most unfavorable mechanical parts, belong to the node board weak position.
Online since: December 2010
Authors: Shen Bai Zheng, Yue Long, Li Rong Gao, Li Wei Duan, Li Sheng Zhang
The rolling data is updated and calculated circularly, until the front or later stand meets mechanical and movement balance.
New tension equation Tension comes from the different speed of workpiece of mill export and import, and two factors considered will slow down the tension strength: one is the charge of forward and backward slip under the tension, the other is the speed of motor, which is changed by tension moment.
But the tension will affect rolling speed, so the continuous rolling system with tension is a dynamic equilibrium process.
The third part (Ⅲ) in Fig.3 is the dynamic modules of lifter looper, which is the properties of two order transfer frames for lifter.
Journal of China Mechanical Engineering(In Chinese) Vol. 14(2003), p, 1770
New tension equation Tension comes from the different speed of workpiece of mill export and import, and two factors considered will slow down the tension strength: one is the charge of forward and backward slip under the tension, the other is the speed of motor, which is changed by tension moment.
But the tension will affect rolling speed, so the continuous rolling system with tension is a dynamic equilibrium process.
The third part (Ⅲ) in Fig.3 is the dynamic modules of lifter looper, which is the properties of two order transfer frames for lifter.
Journal of China Mechanical Engineering(In Chinese) Vol. 14(2003), p, 1770
Online since: June 2009
Authors: Fani Pinakidou, Panos Patsalas, E.C. Paloura, M. Katsikini, Gregory Abadias
The fitting parameters were the coordination number (Ni), the Cu-Cu and Cu-Ti bondlengths
(RCu-Cu and RCu-Ti) and the Debye-Waller factors of the Ti atoms.
Sundgren, Structure and properties of TiN coatings, Thin Solid Films 128 (1985) 21-44
VlCek Microstructure and properties of nanocomposite Ti-B-N and TiB-C coatings, Surf.
Le Bourhis, Structural and mechanical properties of IBAD deposited nanocomposite Ti-Ni-N coatings, Surf.
Schell, The structure and the corresponding mechanical properties of magnetron sputtered TiN-Cu nanocomposites, Surf.
Sundgren, Structure and properties of TiN coatings, Thin Solid Films 128 (1985) 21-44
VlCek Microstructure and properties of nanocomposite Ti-B-N and TiB-C coatings, Surf.
Le Bourhis, Structural and mechanical properties of IBAD deposited nanocomposite Ti-Ni-N coatings, Surf.
Schell, The structure and the corresponding mechanical properties of magnetron sputtered TiN-Cu nanocomposites, Surf.