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Online since: October 2023
Authors: Karel Dvořák, Dorothea Sklenářová
It was already observed that the different composition and structure of a raw material influence the transformation process and has effects on the chemical and mechanical properties of the formed lime.
This study is focused on the characterization of the raw material (porosity, chemical composition, geological age and origin) and its effect on the burning process and the formation of CaO and its properties.
Even two mineral samples obtained from apparently the same quarry/location can have very different physical and chemical properties, as they were formed differently [1].
This high industrial need have a heavy environmental impact of a high carbon footprint, which in this century is one of the important factors in the industry.
The properties of the input material and how it affects the transformation process and the parameters of the product material, is the main objective of this study.
This study is focused on the characterization of the raw material (porosity, chemical composition, geological age and origin) and its effect on the burning process and the formation of CaO and its properties.
Even two mineral samples obtained from apparently the same quarry/location can have very different physical and chemical properties, as they were formed differently [1].
This high industrial need have a heavy environmental impact of a high carbon footprint, which in this century is one of the important factors in the industry.
The properties of the input material and how it affects the transformation process and the parameters of the product material, is the main objective of this study.
Online since: July 2013
Authors: Fábio Dondeo Origo, Jefferson de Oliveira Gomes, José Divo Bressan, André Marcon Zanatta, Alvaro José Damião
As the mould life expectative is high (in some cases exceeding 10 years), the most important properties of such materials are related to the surface integrity which is affected by the material processing characteristics such as polishability, machinability and heat treatment response.
The mould steel machinability is influenced not only by the mechanical and physical steel properties, related to its chemical composition and microstructure, but also by the production processes utilized in its fabrication [4].
On the other hand, polishability is a measure of how easy it is to perform surface polishing in tool steel, being affected by various metallurgical factors.
The finishing of a surface, which is related to its roughness, strongly affects the surface adhesion, lubrification, optical properties, etc.
This irregular appearance is generally referred to as "orange peel" and may be related to several factors.
The mould steel machinability is influenced not only by the mechanical and physical steel properties, related to its chemical composition and microstructure, but also by the production processes utilized in its fabrication [4].
On the other hand, polishability is a measure of how easy it is to perform surface polishing in tool steel, being affected by various metallurgical factors.
The finishing of a surface, which is related to its roughness, strongly affects the surface adhesion, lubrification, optical properties, etc.
This irregular appearance is generally referred to as "orange peel" and may be related to several factors.
Online since: May 2011
Authors: Xiao Yu Wu, Rong Cheng, Jian Ping Zheng
Optimum process conditions are obtained by analysis of variance (ANOVA) is used to understand the significance of process variables affecting dimension accuracy.
And, depending on the material, up to 100% density can be achieved with material properties comparable to those from conventional manufacturing methods.
Table 1 shows three different levels of the abovementioned four factors in our systematic investigation.
It is obviously that from Table 4 and Fig. 3 shows that the range order of the factors is SD> SB > SC > SA.
Material Properties, Fabrication parameters in selective laser sintering process, Rapid Prototyp.
And, depending on the material, up to 100% density can be achieved with material properties comparable to those from conventional manufacturing methods.
Table 1 shows three different levels of the abovementioned four factors in our systematic investigation.
It is obviously that from Table 4 and Fig. 3 shows that the range order of the factors is SD> SB > SC > SA.
Material Properties, Fabrication parameters in selective laser sintering process, Rapid Prototyp.
Online since: October 2023
Authors: Somnath Chattopadhyaya, Gaurav Mishra, Ankita Mistri, Rajarshi Kumar Tarafdar, Shakti Kumar
Microstructure of weld also affects the joint properties hence its study can help to understand about factors that influence joint properties.
These factors influence size of grain formation in nugget zone.
Nakata, Development of microstructure and mechanical properties in laser-FSW hybrid welded inconel 600, Mater.
Li, Mechanical properties of electric assisted friction stir welded 2219 aluminum alloy, J.
Li, Microstructure and mechanical properties of electrically assisted friction stir welded AZ31B alloy joints, J.
These factors influence size of grain formation in nugget zone.
Nakata, Development of microstructure and mechanical properties in laser-FSW hybrid welded inconel 600, Mater.
Li, Mechanical properties of electric assisted friction stir welded 2219 aluminum alloy, J.
Li, Microstructure and mechanical properties of electrically assisted friction stir welded AZ31B alloy joints, J.
Online since: April 2012
Authors: S.S.R. Koloor, Redzuan Abdullah, M. Joshani
Cohesive fracture properties such as fracture energy and initiation stress were derived from horizontal shear bond stress versus end slip curves.
The nonlinear behavior of concrete material is attributed to two distinct material’s mechanical properties; plasticity and damage mechanisms.
Table 1: Concrete mechanical and brittle cracking properties used in the FE model [5].
Table 2: Steel properties used in the finite element model [5].
for the cohesive element properties, such as the area under the traction separation curve and the initial stiffness of the cohesive zone.
The nonlinear behavior of concrete material is attributed to two distinct material’s mechanical properties; plasticity and damage mechanisms.
Table 1: Concrete mechanical and brittle cracking properties used in the FE model [5].
Table 2: Steel properties used in the finite element model [5].
for the cohesive element properties, such as the area under the traction separation curve and the initial stiffness of the cohesive zone.
Online since: July 2011
Authors: Yi Luo, Chang Hua Du, Hui Bin Xu, Chun Tian Li
On the other hand, in the actual welding process, the system is inevitably affected by interference from external factors, such as the surface of the work pieces is uneven near the zone of weld joint, the instability of the operation, small changes in speed of wire feed, the voltage fluctuations from grid and other factors, might cause damage to the static equilibrium, so, which requires the system, after the disappearance of interference factors from the outside world, can automatically recover or reach a new static equilibrium, making re-welding process parameters to restore and maintain stability.[2][3]
The static model of the system
Without interference from external factors, if the system can ensure the arc's continuous and stable combustion in a given parameter based on welding process, and maintain the system's static equilibrium, the electrical characteristics of the system should have the following relationship:
(1)
Beijing: Mechanical Industry Press, 2007.35-36
Beijing: Mechanical Industry Press, 2004.4-30
Beijing: Mechanical Industry Press, 2000. 5-25, 35-44
Mironov, Effect of the secondary current lead resistances on the properties of an arc steel-melting furnace as a receiver and transformer of electric power.
Beijing: Mechanical Industry Press, 2007.35-36
Beijing: Mechanical Industry Press, 2004.4-30
Beijing: Mechanical Industry Press, 2000. 5-25, 35-44
Mironov, Effect of the secondary current lead resistances on the properties of an arc steel-melting furnace as a receiver and transformer of electric power.
Online since: December 2010
Authors: Yue Hao Luo, De Yuan Zhang
In addition, the factors causing forming errors are also illustrated and discussed, which lay the foundation for further research.
Additionally, the factors affecting replication precision are also investigated.
Due to their excellent performance of good adhesion, mechanical properties, heating resistance and others, they have been widely applied in aerospace, transportation and other fields[3].
Besides the above mentioned reasons, others affecting the replication-precision of large-area shark skin are as follows: although the scales are of enamel microstructure, very hard and not deformable, they are attaching to the epidermal tissue, which is soft, and can produce distortion, so the forming errors are generated, that can affect the forming quality of shark skin in the bio-replicated process, as shown in figure 14.
Fig.13 Schematic diagram of epoxy resin filling Fig.14 Deformation of regional scales Conclusions According to the properties and characteristics of the thermosetting materials, the pre cured micro-embossing technology is presented, which is complement and expansion for current hot-embossing method.
Additionally, the factors affecting replication precision are also investigated.
Due to their excellent performance of good adhesion, mechanical properties, heating resistance and others, they have been widely applied in aerospace, transportation and other fields[3].
Besides the above mentioned reasons, others affecting the replication-precision of large-area shark skin are as follows: although the scales are of enamel microstructure, very hard and not deformable, they are attaching to the epidermal tissue, which is soft, and can produce distortion, so the forming errors are generated, that can affect the forming quality of shark skin in the bio-replicated process, as shown in figure 14.
Fig.13 Schematic diagram of epoxy resin filling Fig.14 Deformation of regional scales Conclusions According to the properties and characteristics of the thermosetting materials, the pre cured micro-embossing technology is presented, which is complement and expansion for current hot-embossing method.
Online since: November 2011
Authors: Yu Tao Zhao, Hua Jin, Shuai Chen
Tensile properties were tested at room temperature by zwick/roell test machine.
The sizes of the specimens for mechanical properties testing were shown in Fig.1 .
An interesting factor affecting the hardness of a composite system is the extent of bonding between reinforcement and matrix material.
Basically tensile properties of composite material are a strong function of nature and properties of reinforcing elements and matrix material.
The compatibility between matrix and reinforcement plays a key role in enhancing the mechanical properties; in particular, ultimate tensile strength of composites.
The sizes of the specimens for mechanical properties testing were shown in Fig.1 .
An interesting factor affecting the hardness of a composite system is the extent of bonding between reinforcement and matrix material.
Basically tensile properties of composite material are a strong function of nature and properties of reinforcing elements and matrix material.
The compatibility between matrix and reinforcement plays a key role in enhancing the mechanical properties; in particular, ultimate tensile strength of composites.
Online since: March 2015
Authors: Hua Xi Li
Introduction
Many factors affect the compressive strength of concrete, such as cement composition and fineness, water-to-cement ratio, aggregate, age and temperature of curing.
It improves a lot of properties of hardened concrete [1].
The primary factors that affected the compressive strength of concrete are the ratios of water, SF to binder materials and time of curing in water.
Investigations on mechanical properties of high strength silica fume concrete.
Mechanical properties of polymermodified concretes containing expanded polystyrene beads.
It improves a lot of properties of hardened concrete [1].
The primary factors that affected the compressive strength of concrete are the ratios of water, SF to binder materials and time of curing in water.
Investigations on mechanical properties of high strength silica fume concrete.
Mechanical properties of polymermodified concretes containing expanded polystyrene beads.
Online since: September 2013
Authors: Zhan Feng Liu, Meng Xu
Abstract: In this paper, through the analysis of 304 stainless steel to elaborate the influence of various factors in the process of drilling from the blade material,tool geometry parameters,cutting parameters and drilling methods.It is proved by selecting reasonable processing, cutting tools and cutting parameters (Φ50mm × 4700mm) 304 stainless steel parts of the drilling process issues can be resolved.
Introduction With continuous development of China's industrial technology, the demand for stainless steel is increasing.304 stainless steel has good corrosion resistance, heat resistance,low temperature strength,good processing properties and weldability, High-Cycle Fatigue Properties.Based on the above good performance,304 stainless steel is widely used in aviation,chemicals,energy and so on.304 stainless steel is a general-purpose stainless steel and difficult to machine.In the process of drilling, it has problems of large plastic deformation,low thermal conductivity,work hardening serious,big cutting heat,cooling difficulties,severe adhesion of chips on the edge,chip difficult to discharge .Considering the characteristics of the material itself,this article studies the test from the blade material,blade geometry parameters and the cutting Parameters to improve the 304 stainless steel super long deep-hole machining quality and production efficiency.
Workpiece material properties and Processing requirements 304 stainless steel chemical composition and mechanical properties are shown in Table 1, Table 2.
Table 1 304 stainless steel chemical composition Element C Si Mn P S Cr Ni Content(%) 0.08 1.00 2.00 0.045 0.03 18.00~20.00 8.00~10.50 Table 2 304 stainless steel mechanical properties Project (MPa) (MPa) (%) (%) numeric 520 205 13 60 The workpiece is made of 304 stainless steel bar,quenched hardness of HB 160 ~ 180,The diameter of the workpiece.
Testing process analysis 3.1 Drilling process analysis and Boring process analysis It is using edge wrong teeth chip removal system to make the 304 stainless steel super long deep hole drilling test,the text processing taking rotation of the workpiece, the tool feed .During the drilling tool ,cutter body generated radial vibration due to the force.Because the shank is too long, arbor vibration will increase,Thereby affecting the tool feed,it is easy to occur knife fight , increased tool wear and reduced accuracy of the workpiece.
Introduction With continuous development of China's industrial technology, the demand for stainless steel is increasing.304 stainless steel has good corrosion resistance, heat resistance,low temperature strength,good processing properties and weldability, High-Cycle Fatigue Properties.Based on the above good performance,304 stainless steel is widely used in aviation,chemicals,energy and so on.304 stainless steel is a general-purpose stainless steel and difficult to machine.In the process of drilling, it has problems of large plastic deformation,low thermal conductivity,work hardening serious,big cutting heat,cooling difficulties,severe adhesion of chips on the edge,chip difficult to discharge .Considering the characteristics of the material itself,this article studies the test from the blade material,blade geometry parameters and the cutting Parameters to improve the 304 stainless steel super long deep-hole machining quality and production efficiency.
Workpiece material properties and Processing requirements 304 stainless steel chemical composition and mechanical properties are shown in Table 1, Table 2.
Table 1 304 stainless steel chemical composition Element C Si Mn P S Cr Ni Content(%) 0.08 1.00 2.00 0.045 0.03 18.00~20.00 8.00~10.50 Table 2 304 stainless steel mechanical properties Project (MPa) (MPa) (%) (%) numeric 520 205 13 60 The workpiece is made of 304 stainless steel bar,quenched hardness of HB 160 ~ 180,The diameter of the workpiece.
Testing process analysis 3.1 Drilling process analysis and Boring process analysis It is using edge wrong teeth chip removal system to make the 304 stainless steel super long deep hole drilling test,the text processing taking rotation of the workpiece, the tool feed .During the drilling tool ,cutter body generated radial vibration due to the force.Because the shank is too long, arbor vibration will increase,Thereby affecting the tool feed,it is easy to occur knife fight , increased tool wear and reduced accuracy of the workpiece.