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Online since: March 2008
Authors: Jean Bernard Vogt
In addition, it has been demonstrated that
DSS combined very good mechanical properties (strength, ductility, toughness…) and corrosion
resistance (particularly in the case of chloride corrosion), in a wide variety of applications.
However the relationship between microstructure and mechanical properties is most of time difficult to be predicted.
It is therefore of interest to know if under cyclic loading similar restricting properties exist and how to reduce them.
However, the mechanical properties of 475°C aged DSS are well known to be ferrite dependent.
Conclusions Duplex stainless steels exhibit a lot of interesting properties which to be improved requires deep metallurgical analysis.
However the relationship between microstructure and mechanical properties is most of time difficult to be predicted.
It is therefore of interest to know if under cyclic loading similar restricting properties exist and how to reduce them.
However, the mechanical properties of 475°C aged DSS are well known to be ferrite dependent.
Conclusions Duplex stainless steels exhibit a lot of interesting properties which to be improved requires deep metallurgical analysis.
Online since: October 2010
Authors: Hazman Seli, Ahmad Izani Md. Ismail, Endri Rachman, Zainal Arifin Ahmad
The temperature gradient and plastic thermal deformations determine microstructural changes, diffusion phenomena and mechanical properties of the finished product.
Unfavourable thermal and stress effects are intensified when materials of different heat and mechanical properties, like Al2O3 and Al, are bonded.
This phenomenon occurs due to the different thermal properties.
The discrepancy of the two temperature profiles is due to some factors.
Among the factors which need to be overcome are poor machine performance, limitations in collecting data and human factors, since the operation is manual.
Unfavourable thermal and stress effects are intensified when materials of different heat and mechanical properties, like Al2O3 and Al, are bonded.
This phenomenon occurs due to the different thermal properties.
The discrepancy of the two temperature profiles is due to some factors.
Among the factors which need to be overcome are poor machine performance, limitations in collecting data and human factors, since the operation is manual.
Online since: January 2013
Authors: Wen Tao Liu, Jian Guo Ma, Zhe Zhu, Qiang Zou
Different buffer layers of polyvinly alcohol (PVA) and ZnO thin film are main factors leading to the differences in PL spectrum.
In this paper, ZnOnanobelts are introduced in order to modify the optical properties of the existing glass optical fibers made from silica.
It presents the idea that we plan to study the optical properties of the fiber by studying this developed pattern first.
We can also see from the TG analysis of the picture that the temperature of heat treatment is 600℃, which indicates the complete decomposition of PVA, thus no affects on the properties of ZnOnanobelts.
Then we concern about the technical processes that mainly affect the differences between sample 1 and 2, thus pay more attention on PVA.
In this paper, ZnOnanobelts are introduced in order to modify the optical properties of the existing glass optical fibers made from silica.
It presents the idea that we plan to study the optical properties of the fiber by studying this developed pattern first.
We can also see from the TG analysis of the picture that the temperature of heat treatment is 600℃, which indicates the complete decomposition of PVA, thus no affects on the properties of ZnOnanobelts.
Then we concern about the technical processes that mainly affect the differences between sample 1 and 2, thus pay more attention on PVA.
Online since: February 2024
Authors: Oluseyi Solomon Orenuga, Oluwakemi Adebisi, Iyabode Adediran
This is due to their eco-friendliness and adequate mechanical properties.
All these factors result from the production of biomass.
Also, apart from the hygrothermal properties, it is also associated with good mechanical properties [12].
A review of material properties and performance of straw bale as building material.
Pathways to successful building green retrofit projects: Causality analysis of factors affecting decision making.
All these factors result from the production of biomass.
Also, apart from the hygrothermal properties, it is also associated with good mechanical properties [12].
A review of material properties and performance of straw bale as building material.
Pathways to successful building green retrofit projects: Causality analysis of factors affecting decision making.
Online since: July 2022
Authors: Alexey Vasilchenko, Olexandr Danilin, Oleksandr Blyznyuk, Eleonora Darmofal
Physical properties: crystal structure; refractive index; color; density; hardness; particle shape and size (dispersion); specific surface; bulk density; solubility;
Chemical properties: pH of water extract; resistance to water and chemical reagents (acids, alkalis); reactivity; acid-base properties of the surface.
The shrinkage of the polymer, in addition to factors such as temperature, cooling rate, pigment concentration, is determined mainly by the degree of crystallinity.
Tests of physical and mechanical properties were performed according to the method [16].
Impact strength of the composition based on carbon black brand P803 depending on the concentration of the additive As can be seen from the tables and figures, the selected modifiers ambiguously affect the properties of polyethylene samples.
Viscoelastic properties of sterically stabilized emulsions and their stability.
The shrinkage of the polymer, in addition to factors such as temperature, cooling rate, pigment concentration, is determined mainly by the degree of crystallinity.
Tests of physical and mechanical properties were performed according to the method [16].
Impact strength of the composition based on carbon black brand P803 depending on the concentration of the additive As can be seen from the tables and figures, the selected modifiers ambiguously affect the properties of polyethylene samples.
Viscoelastic properties of sterically stabilized emulsions and their stability.
Effects of Tool Geometrical Parameters on the Chip Formation and Cutting Force in Orthogonal Cutting
Online since: December 2004
Authors: P. Zeng, Gang Fang
The large deformation Rigid-visco-plastic FEM program DEFORM-2DTM is used,
and thermo-mechanical coupling effect are considered.
But, these models could not really account for many factors, for example, flow stress varying strain, strain rate and temperature, fracture, serrated chip and residual stress.
For the temperature calculations, the thermal properties of workpiece and tool are provided.
It is an important factor influencing cutting force.
Palmer and P.L.B Oxley: Proceedings of International Mechanical Engineers Vol. 173 (1959), p. 623 [5] E.
But, these models could not really account for many factors, for example, flow stress varying strain, strain rate and temperature, fracture, serrated chip and residual stress.
For the temperature calculations, the thermal properties of workpiece and tool are provided.
It is an important factor influencing cutting force.
Palmer and P.L.B Oxley: Proceedings of International Mechanical Engineers Vol. 173 (1959), p. 623 [5] E.
Online since: October 2014
Authors: Rui Can Hao, Wen Gong, Jin Ru Ma, Hua Gang Liu
Analysis on Measuring Circuit of Pressure Difference Sensor with Magnetic Fluid
Rui-can HAOa, Hua-gang LIUb, Wen GONGc and Jin-ru MA
School of Mechanical Engineering, Beijing Polytechnic, Beijing 100176, China
ahaoruican@163.com, bliuhuagang999@126.com, cgongwen119@yahoo.com.cn
*Rui-can HAO
Keywords: measuring circuit; pressure difference; sensor
Abstract.
Due to many sensing properties, magnetic fluid is used in a novel application--sensor.
The power frequency and the input voltage are the two important factors for the measuring circuit.
Introduction Magnetic fluid has many properties such as fluidity, magnetism, buoyancy principle, and so on.
Determination of Power Frequency The power frequency affects the output voltage of the circuit directly, so the selection of the power frequency determines the sensitivity of the pressure difference sensor with magnetic fluid.
Due to many sensing properties, magnetic fluid is used in a novel application--sensor.
The power frequency and the input voltage are the two important factors for the measuring circuit.
Introduction Magnetic fluid has many properties such as fluidity, magnetism, buoyancy principle, and so on.
Determination of Power Frequency The power frequency affects the output voltage of the circuit directly, so the selection of the power frequency determines the sensitivity of the pressure difference sensor with magnetic fluid.
Online since: November 2011
Authors: Heng Lin Yang, Zhong Ian Tian, Li Song Zhang, Xiang Zhen Yan
The criterion started from the properties of intact rock and then introduced factors to reduce these properties on the basis of the characteristics of joints in a rock mass.
It not only considers the mechanical properties of the rock, but also uses GSI to modify the rock's deformations and strength parameters.
Hoek-Brown criterion can be expressed as follow [7]: (1) Where , are maximum and minimum principal stress; is uniaxial compressive strength for intact rock; is rock constant; , are the coefficient of rock properties.
It takes the structure face's strength, coal and rock mass strength and a variety of factors into account.
If coal and rock mass is seriously affected by the structure, the GSI is among 45 to 55.
It not only considers the mechanical properties of the rock, but also uses GSI to modify the rock's deformations and strength parameters.
Hoek-Brown criterion can be expressed as follow [7]: (1) Where , are maximum and minimum principal stress; is uniaxial compressive strength for intact rock; is rock constant; , are the coefficient of rock properties.
It takes the structure face's strength, coal and rock mass strength and a variety of factors into account.
If coal and rock mass is seriously affected by the structure, the GSI is among 45 to 55.
Online since: February 2012
Authors: M.M. Mahat, J. Ramli, D.N. Awang Sh’ri, Yusof Nor Imrah, Nasrul Azuan Alang
Effects of Surface Pretreatment to the Properties of Aluminum Oxide (Al2O3) Cutting Tool Coated Amorphous Graphite
J.
In addition, some paper has reported on the deposition of Titanium Oxide (TiO2) thin film on substrate in an attempt to study the behavior of adhesion properties, wear and scratch resistance of TiO2 films.
Surface roughness is one of the key factors determining the performance of coated tools.
Conclusions In this research, effect of surface pretreatment to the properties of amorphous graphite coated on the cutting tool has been observed.
Laugier., Study of mechanical properties of CVD diamond on SiC substrates.
In addition, some paper has reported on the deposition of Titanium Oxide (TiO2) thin film on substrate in an attempt to study the behavior of adhesion properties, wear and scratch resistance of TiO2 films.
Surface roughness is one of the key factors determining the performance of coated tools.
Conclusions In this research, effect of surface pretreatment to the properties of amorphous graphite coated on the cutting tool has been observed.
Laugier., Study of mechanical properties of CVD diamond on SiC substrates.
Online since: August 2012
Authors: Ying Liu, Hong Qiao Zhang, Chun Ling Xin, Ya Dong He, Bao Rui Yan
Evaluation of injection molding screw performance by melt viscosity homogeneity
Hongqiao Zhang 1, a, Chunling Xin1,b,Baorui Yan1,c, Yadong He 1,d*
and Ying Liu1,e
1College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, BeiJing, P.R.China
azhq198686@126.com, bxincl@mail.buct.edu.cn, cyanbr@mail.buct.edu.cn, d*heyd@mail.buct.edu.cn, e Liuying_jixie0404@163.com
Key words: injection molding screw; melt viscosity homogeneity, performance evaluation
Abstract
Though theoretical analysis and experimental verification, a direct method that measuring melt pressure fluctuation at the nozzle to reflect melt viscosity fluctuation in injection molding process was developed.
Experiments for four injection molding screws and the analysis for the relationships between the melt viscosity homogeneity and screws configuration, melt temperature homogeneity, repeating weight precision and mechanical properties of the injection molding parts were conducted.
The melt temperature is the main factor.
With the volume settled, the density was the main factor which affected the product weight.
Experiments for four injection molding screws and the analysis for the relationships between the melt viscosity homogeneity and screws configuration, melt temperature homogeneity, repeating weight precision and mechanical properties of the injection molding parts were conducted.
The melt temperature is the main factor.
With the volume settled, the density was the main factor which affected the product weight.