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Online since: August 2011
Authors: Min Ke Sun, Dong Sheng Zhao, Yu Jun Liu
Composite structure elements of Carbon steel and the Stainless steel can deliver excellent performance on both anti-corrosion and anti-oxidation, but also can take advantage of the mechanical properties of carbon, all of which make it widely used in the filed of shipbuilding, chemical, nuclear and so on [1].
But due to the difference of material properties, welding residual stress is more serious and complex in the dissimilar joint.
Welding simulation FE model and material properties.
The thermal physical properties and mechanical properties of the base metals(304 stainless steel and Q235) in different temperature are shown in Table 1 and table 2.
Table1 Thermal, physical and mechanical properties of 304 stainless steel [6].
But due to the difference of material properties, welding residual stress is more serious and complex in the dissimilar joint.
Welding simulation FE model and material properties.
The thermal physical properties and mechanical properties of the base metals(304 stainless steel and Q235) in different temperature are shown in Table 1 and table 2.
Table1 Thermal, physical and mechanical properties of 304 stainless steel [6].
Online since: June 2009
Authors: James C. Sung, M.Y. Tsai
Sung
2b
1
Department of Mechanical Engineering, National Chin-yi Technology of University, No. 35 Lane
215 Chung-Shan Rd.
Foam density, open or closed cells, cell shape along with the intrinsic polymer properties determines the final pad properties
The experimental result can be attributed to the visco-elastic property of the soft EV4000 pad.
The cutting rate was one of the most important factors that affected the surface condition of the pad.
Gutmann: Chemical Mechanical Planarization of Microelectronic Materials (John Wiley & Sons, NY 1997)
Foam density, open or closed cells, cell shape along with the intrinsic polymer properties determines the final pad properties
The experimental result can be attributed to the visco-elastic property of the soft EV4000 pad.
The cutting rate was one of the most important factors that affected the surface condition of the pad.
Gutmann: Chemical Mechanical Planarization of Microelectronic Materials (John Wiley & Sons, NY 1997)
Online since: September 2013
Authors: Supattanapong Dumrongrattana, M. Horprathum, Anurat Wisitsoraat, Pitak Eiamchai, Viyapol Patthanasettakul, Pongpan Chindaudom, Benjarong Samransuksamer, Worawarong Rakreungdet
The enhancement in the gas-sensing properties was test by ethanol gas.
With a mechanical and a turbo pumps, the deposition chamber reached the base pressure at 1Í10-4 mTorr.
Results and discussion Microstructural Properties GIXRD patterns of the prepared TiO2 thin films are shown in Fig. 1.
Ethanol gas-sensing properties In this section, we examined the effect of the annealing treatment on the ethanol gas-sensing properties of the TiO2-based gas sensors.
The ethanol gas-sensing properties were investigated at different operating temperatures.
With a mechanical and a turbo pumps, the deposition chamber reached the base pressure at 1Í10-4 mTorr.
Results and discussion Microstructural Properties GIXRD patterns of the prepared TiO2 thin films are shown in Fig. 1.
Ethanol gas-sensing properties In this section, we examined the effect of the annealing treatment on the ethanol gas-sensing properties of the TiO2-based gas sensors.
The ethanol gas-sensing properties were investigated at different operating temperatures.
Online since: April 2019
Authors: Augustín Görög, Ingrid Görögová, Maroš Martinkovič
Technological processes have a significant influence on the properties of the metallic formed pieces during production.
We get an important knowledge of relationship “technological parameters – microstructure – properties”.
The results showed that the ensuing surface profiles were controlled by several factors: applied boundary conditions, Taylor factor and shear tendency of the individual grains and the spatial distribution of grain neighborhood orientations.
This is unalloyed structural fine grain steel having the following mechanical properties: Re = 235 MPa, Rm = 340 – 440 MPa, A = 25 % [9,10].
Effect of reducing on the mechanical properties of cold drawn tubes.
We get an important knowledge of relationship “technological parameters – microstructure – properties”.
The results showed that the ensuing surface profiles were controlled by several factors: applied boundary conditions, Taylor factor and shear tendency of the individual grains and the spatial distribution of grain neighborhood orientations.
This is unalloyed structural fine grain steel having the following mechanical properties: Re = 235 MPa, Rm = 340 – 440 MPa, A = 25 % [9,10].
Effect of reducing on the mechanical properties of cold drawn tubes.
Online since: February 2016
Authors: Aleksey S. Varlamov, Leonid G. Znamenskij, O.V. Ivochkina
Consequently, the silicon contained in the alloy above the permissible limits in the zone of saturation changes the nature of the alloy micro texture, this adversely affects the office properties of the casting.
The study of the general defects of castings made of heat-resistant nickel alloys produced by lost wax process in the ethyl silicate ceramic molds, showed that the largest reject rate accounted for point defects affecting the cast surface, expressed as a flash during LUM control castings.
Experimental research For the manufacture of ceramic molds with improved physics and mechanical properties and process characteristics necessary for the lost-wax casting production, there was lead a number of scientific researches, during which the composition of the slurry was obtained for making molds.
Ceramic molds and castings properties, manufacturing charges Property denomination Basic Technology Developed Technology [4] 1.
The developed technology allows to produce high-quality ceramic shell molds on the cheap safe aluminium-borophosphate concentrate, and, the physical and mechanical properties are equal to those of ethyl silicate molds, and substantially exceed at knockout, permeability to gases, molds forming rate.
The study of the general defects of castings made of heat-resistant nickel alloys produced by lost wax process in the ethyl silicate ceramic molds, showed that the largest reject rate accounted for point defects affecting the cast surface, expressed as a flash during LUM control castings.
Experimental research For the manufacture of ceramic molds with improved physics and mechanical properties and process characteristics necessary for the lost-wax casting production, there was lead a number of scientific researches, during which the composition of the slurry was obtained for making molds.
Ceramic molds and castings properties, manufacturing charges Property denomination Basic Technology Developed Technology [4] 1.
The developed technology allows to produce high-quality ceramic shell molds on the cheap safe aluminium-borophosphate concentrate, and, the physical and mechanical properties are equal to those of ethyl silicate molds, and substantially exceed at knockout, permeability to gases, molds forming rate.
Online since: December 2013
Authors: Mohd Noor Arib Rejab, Roslan Abd Rahman, Raja Ishak Raja Hamzah, Jawaid Iqbal Inayat Hussain, Asyraf Ismail, Nazirah Ahmad
These scenarios affect vibratory behaviour and increase the vibration and noise in the compartment of passenger car.
One of the factors of vibration is engine excitation force generated by gas pressure of fuel explosion in the cylinder and inertia force of rotating piston and connecting rod.
Elastomeric mount shows remarkable dynamic stiffness properties at higher frequency levels.
In addition, properties of elastomeric mount including compactness, cost-effectiveness and low maintenance make it very attractive for low price vehicle [1].
Snowdon, Vibration and shock in damped mechanical systems, John Wiley & Sons, Unated States of America, 1968
One of the factors of vibration is engine excitation force generated by gas pressure of fuel explosion in the cylinder and inertia force of rotating piston and connecting rod.
Elastomeric mount shows remarkable dynamic stiffness properties at higher frequency levels.
In addition, properties of elastomeric mount including compactness, cost-effectiveness and low maintenance make it very attractive for low price vehicle [1].
Snowdon, Vibration and shock in damped mechanical systems, John Wiley & Sons, Unated States of America, 1968
Online since: August 2023
Authors: Ahmed Sultan Ali, Qahtan Suleman Noaman, Wissal Ali Hussein
Rheology of Cement Slurry
Materials made of cement may help predict end-use performance and physical characteristics before and after processing by using rheological factors.
The Model 800 8-Speed Electronic Oilfield Viscometer is the equipment for rheological properties evaluation in this investigation.
Table 5 Rheological Properties.
Arthur, “Effect of GGBS and curing conditions on strength and microstructure properties of oil well cement slurry,” J.
Nehdi, “Rheological properties of oil well cement slurries,” Proc.
The Model 800 8-Speed Electronic Oilfield Viscometer is the equipment for rheological properties evaluation in this investigation.
Table 5 Rheological Properties.
Arthur, “Effect of GGBS and curing conditions on strength and microstructure properties of oil well cement slurry,” J.
Nehdi, “Rheological properties of oil well cement slurries,” Proc.
Online since: March 2017
Authors: Sarum Boonmee, Nupol Mai-Ngam
The content of sulfur in molding materials has been known as an important factor of the occurrence of the graphite degradation.
Introduction The negative effect of casting skin on the mechanical properties has been demonstrated by several investigators [1-5].
Other affecting parameters on the formation of the graphite degradation are pouring temperature, level of Mg in iron melt and casting thickness.
The Mg depletion due the oxidation could not be accounted as the main factor because of the limitation of oxygen available (cores surrounded by liquid iron).
Introduction The negative effect of casting skin on the mechanical properties has been demonstrated by several investigators [1-5].
Other affecting parameters on the formation of the graphite degradation are pouring temperature, level of Mg in iron melt and casting thickness.
The Mg depletion due the oxidation could not be accounted as the main factor because of the limitation of oxygen available (cores surrounded by liquid iron).
Online since: July 2014
Authors: Hua Dong Ding, Ye Wang Sun, Jun Wei Yang, Jia Ying Zhang, Gang Zhao
Normal stress and shearing stress were the factors which affected the coating shedding in the tensile process.
Material properties were shown in Table 1.
Coating Substrate 10 mm 1 mm 10 mm 10 mm Symmetry constraint 0 displacement constraint 51 MPa Fig.1 Tensile sample Fig.2 Finite element model Table.1 Finite-element analysis setup of material properties Property Elastic ratio E/ GPa Poisson ratio v FeAlCrBSiNb 215 0.25 45 210 0.269 According to the sample, the finite element model was established.
It assumed that the thickness of coating was uniform and the material properties were isotropic.
Consequently, applied load that cracks extending needed would directly affect the load value that coating completely peeling off needed.
Material properties were shown in Table 1.
Coating Substrate 10 mm 1 mm 10 mm 10 mm Symmetry constraint 0 displacement constraint 51 MPa Fig.1 Tensile sample Fig.2 Finite element model Table.1 Finite-element analysis setup of material properties Property Elastic ratio E/ GPa Poisson ratio v FeAlCrBSiNb 215 0.25 45 210 0.269 According to the sample, the finite element model was established.
It assumed that the thickness of coating was uniform and the material properties were isotropic.
Consequently, applied load that cracks extending needed would directly affect the load value that coating completely peeling off needed.
The Reverse Design and Injection Molding Analysis of Plastic Product Based on Imageware and Moldflow
Online since: February 2012
Authors: Heng Tan, Ze Wang, Guo Hong Dai
Weld 1ines will affect the surface quality of the products, even cause plastic scrap.
So the weld lines that the first project didn’t affect the quality of the helmet and mechanical properties [5].The warp analysis mainly is used to judge if the deformation appears in the injection molding of the thermoplastic material.
The value of warp was 1.718mm.The value of warp was 1.186mm due to the cooling factor.
The value of warp was 0.8068 due to the contract factor.
Beijing: mechanical industry press, 2003
So the weld lines that the first project didn’t affect the quality of the helmet and mechanical properties [5].The warp analysis mainly is used to judge if the deformation appears in the injection molding of the thermoplastic material.
The value of warp was 1.718mm.The value of warp was 1.186mm due to the cooling factor.
The value of warp was 0.8068 due to the contract factor.
Beijing: mechanical industry press, 2003