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Online since: October 2010
Authors: Hou Fa Shen, Jia Zhang, Tian You Huang
One of the main factors affecting the product quality is the strand deformation caused by the temperature distribution, ferrostatic head of the liquid core and mechanical stress imposed by the rolls.
Model Description In continuous casting, the material property parameters vary with the temperature profile and the geometric configuration of the steel shell is determined by the heat transfer.
Considering the heat transfer of the strand being not strongly affected by the stress and displacement distribution, it is reasonable to assume the mechanical analysis is dependent on the temperature distribution but there is no inverse dependency for the simplicity of the solution, which means a sequentially coupled thermal-mechanical analysis can be conducted in continuous casting.
In the mechanical analysis, the computation region is the same as thermal analysis.
The model and solution algorithm are validated by the comparisons with the measured data, which shows that the process and caster pamameters such as the roll space, are the decisive factors to affect the bulging deformation.
Model Description In continuous casting, the material property parameters vary with the temperature profile and the geometric configuration of the steel shell is determined by the heat transfer.
Considering the heat transfer of the strand being not strongly affected by the stress and displacement distribution, it is reasonable to assume the mechanical analysis is dependent on the temperature distribution but there is no inverse dependency for the simplicity of the solution, which means a sequentially coupled thermal-mechanical analysis can be conducted in continuous casting.
In the mechanical analysis, the computation region is the same as thermal analysis.
The model and solution algorithm are validated by the comparisons with the measured data, which shows that the process and caster pamameters such as the roll space, are the decisive factors to affect the bulging deformation.
Online since: October 2010
Authors: Ian W. Donald, J.A. Fernie, B.L. Metcalfe, L.A. Gerrard
Ageing mechanisms / factors affecting the lifetime behaviour of glass-ceramic-to-metal seals
Many factors need to be taken into consideration in the successful design and manufacture of high quality glass-ceramic-to-metal seals if an adequate lifetime behaviour is to be achieved [1].
In the case of glass sealants partial crystallization during operation will lead to a change in thermal expansion characteristics or mechanical properties which may be detrimental to cell operation [44].
Similarly, for glass-ceramics, a change in crystalline morphology and the formation of voids during operation, as shown in Figure 7, may also affect the long-term properties [19].
Other factors affecting seal quality include of course the surface cleanliness of the starting materials and the amount of water dissolved in the starting glass.
Liu, Effects of crystallization on the high-temperature mechanical properties of a glass sealant for solid oxide fuel cell, J.
In the case of glass sealants partial crystallization during operation will lead to a change in thermal expansion characteristics or mechanical properties which may be detrimental to cell operation [44].
Similarly, for glass-ceramics, a change in crystalline morphology and the formation of voids during operation, as shown in Figure 7, may also affect the long-term properties [19].
Other factors affecting seal quality include of course the surface cleanliness of the starting materials and the amount of water dissolved in the starting glass.
Liu, Effects of crystallization on the high-temperature mechanical properties of a glass sealant for solid oxide fuel cell, J.
Online since: August 2022
Authors: Harsh Dave, Kaustubh Samvatsar
Some major factors affecting casting quality are stated in Fig. 1.
The molud-based factors affecting the quality are moisture and permeability of moulding sand.
Factors affecting the casting quality Degassing Degassing of alloys in the molten state is a critical process and is needed to impart freedom from defects.
The presence of gaseous elements greatly affects the properties of materials.
Pai, Investigation on mechanical properties and creep behavior of stir cast AZ91-SiCp composites, Journal of Magnesium and Alloys 3 (2015) 16-22
The molud-based factors affecting the quality are moisture and permeability of moulding sand.
Factors affecting the casting quality Degassing Degassing of alloys in the molten state is a critical process and is needed to impart freedom from defects.
The presence of gaseous elements greatly affects the properties of materials.
Pai, Investigation on mechanical properties and creep behavior of stir cast AZ91-SiCp composites, Journal of Magnesium and Alloys 3 (2015) 16-22
Online since: October 2023
Authors: Joaquín Barreiro García, Pablo Rodríguez-Mateos, Neetesh Soni, Susana Martínez-Pellitero, Sara Giganto
That is due to its ability to create final functional parts with good mechanical properties.
The material used is 17-4PH stainless steel, an alloy that presents an excellent combination of high strength and good corrosion resistance, high hardness, good thermal properties, as well as excellent mechanical properties at high temperatures.
In particular, 17-4PH stainless steel alloy exhibits an excellent combination of high strength and good corrosion resistance, high hardness, good thermal properties, as well as excellent mechanical properties at high temperatures.
Besides, modifying the scanning strategy also affects various properties of parts such as density, microstructure, mechanical properties or surface quality.
Studying the influence of both factors (sandblasting post-process and laser scanning strategy) is of great value to the manufacturing process in order to promote SLM technique in applications with high surface finish requirements.
The material used is 17-4PH stainless steel, an alloy that presents an excellent combination of high strength and good corrosion resistance, high hardness, good thermal properties, as well as excellent mechanical properties at high temperatures.
In particular, 17-4PH stainless steel alloy exhibits an excellent combination of high strength and good corrosion resistance, high hardness, good thermal properties, as well as excellent mechanical properties at high temperatures.
Besides, modifying the scanning strategy also affects various properties of parts such as density, microstructure, mechanical properties or surface quality.
Studying the influence of both factors (sandblasting post-process and laser scanning strategy) is of great value to the manufacturing process in order to promote SLM technique in applications with high surface finish requirements.
Online since: June 2025
Authors: Ľuboslav Straka, Juraj Hajduk
High-speed steel is characterized by excellent mechanical properties, high hardness and impact resistance, good fracture toughness and fatigue resistance.
Therefore, special attention is paid to important factors that affect the qualitative and quantitative indicators of the machined area.
Their size and shape depend on a large number of factors.
Basically, it is the chemical composition and physical properties, such as the size of the wire cross-section, shape, composition, composition, geometric accuracy, or the mechanical properties of the wire material itself, which primarily represent ductility and strength, determining the limit of the maximum tension of the wire by force in a given diameter [18].
This would lead to an increase in cutting performance without affecting the quality of the machined surface. 3 wire tool electrodes were used in the experiment.
Therefore, special attention is paid to important factors that affect the qualitative and quantitative indicators of the machined area.
Their size and shape depend on a large number of factors.
Basically, it is the chemical composition and physical properties, such as the size of the wire cross-section, shape, composition, composition, geometric accuracy, or the mechanical properties of the wire material itself, which primarily represent ductility and strength, determining the limit of the maximum tension of the wire by force in a given diameter [18].
This would lead to an increase in cutting performance without affecting the quality of the machined surface. 3 wire tool electrodes were used in the experiment.
Online since: February 2019
Authors: A.V. Starunov, K.A. Shpanova, A.V. Arzumanova
The influences of the electrolysis modes and the electrolyte composition to a physical mechanical properties of the coating (wear resistance, firmness to corrosion, micro-hardness, internal stress, porosity, adhesion) were investigated.
The changing of mechanism for electroplated coating are may be a cause of any changes in the physical-mechanical properties of sediment.
The physical and mechanical properties of the nickel-cobalt-silicon oxide coating were investigated.
Balakai, Dependence of physic-mechanical properties of a nickel-cobalt-aluminum oxide composite electrolytic coating on the dispersity of the alloying component, Rus.
Byrylov, Properties of a nickel-boron-fluoroplastic electrolytic composite coating, Rus.
The changing of mechanism for electroplated coating are may be a cause of any changes in the physical-mechanical properties of sediment.
The physical and mechanical properties of the nickel-cobalt-silicon oxide coating were investigated.
Balakai, Dependence of physic-mechanical properties of a nickel-cobalt-aluminum oxide composite electrolytic coating on the dispersity of the alloying component, Rus.
Byrylov, Properties of a nickel-boron-fluoroplastic electrolytic composite coating, Rus.
Online since: July 2011
Authors: Narayana Suresh, Ramaswamy Jeyalakshmi, Uma Suresh
Concrete has remarkable fire resistance properties.
Mechanical properties of concrete such as compressive strength and modulus of elasticity are greatly reduced during exposure to fire.
Scope Cement mortar undergoes significant changes when exposed to high temperature: as a result, the mechanical properties of concrete are affected by high temperature, and the behaviour of structural members may differ from the original design after being exposed to fire.
An admixture consisting of zirconium oxide and titanium oxide may affect concrete properties in different ways, depending on the percentage of admixture.
A, Factors of determining the correlation between concrete properties, Cement and Concrete Research Journal, Vol. 26 (2008), p. 1629-1637
Mechanical properties of concrete such as compressive strength and modulus of elasticity are greatly reduced during exposure to fire.
Scope Cement mortar undergoes significant changes when exposed to high temperature: as a result, the mechanical properties of concrete are affected by high temperature, and the behaviour of structural members may differ from the original design after being exposed to fire.
An admixture consisting of zirconium oxide and titanium oxide may affect concrete properties in different ways, depending on the percentage of admixture.
A, Factors of determining the correlation between concrete properties, Cement and Concrete Research Journal, Vol. 26 (2008), p. 1629-1637
Online since: July 2021
Authors: Nurdin Ali, Husaini Husaini, Teuku Edisah Putra, Akmal Rauzatul, Irvin Barizi Muhammad
If the type of material used on the shaft is obtained, then its mechanical properties can be determined.
These mechanical properties are indispensable as input data in performing finite element analysis.
The chemical composition test results data in Table 1 show the presence of the carbon steel in the drive shaft material as corresponding to those of the AISI 4140 standard material specifications [10], while the mechanical properties of the AISI 4140 in Table 2 indicate its fracture toughness, KIC to be of a 27 MPa√m value [11].
Mechanical Properties of AISI 4140.
Properties Metric Unit Tensile strength (σB) 655 MPa Poisson Ratio (ʋ) 0.28 - Density (ρ) 7850 Kg / m3 Yield strength (σys) 415 MPa Modulus young (E) 200 GPa Shear modulus (μ) 80 GPa Hardness, Rockwell C 25 HRC Allowable shear stress (τa) 36 MPa Fracture Toughness (KIC) 27 MPa√m Hardness.
These mechanical properties are indispensable as input data in performing finite element analysis.
The chemical composition test results data in Table 1 show the presence of the carbon steel in the drive shaft material as corresponding to those of the AISI 4140 standard material specifications [10], while the mechanical properties of the AISI 4140 in Table 2 indicate its fracture toughness, KIC to be of a 27 MPa√m value [11].
Mechanical Properties of AISI 4140.
Properties Metric Unit Tensile strength (σB) 655 MPa Poisson Ratio (ʋ) 0.28 - Density (ρ) 7850 Kg / m3 Yield strength (σys) 415 MPa Modulus young (E) 200 GPa Shear modulus (μ) 80 GPa Hardness, Rockwell C 25 HRC Allowable shear stress (τa) 36 MPa Fracture Toughness (KIC) 27 MPa√m Hardness.
Online since: June 2014
Authors: Jing Tao Han, Jing Liu, Shuai Ji, Jia Geng Liu
Introduction
Titanium and titanium alloy has many excellent properties, such as: high strength, strong corrosion resistance, heat resistance, and good low temperature performance.
Because of the difference between the physical and chemical properties of titanium and steel, such as melting point, linear expansion coefficient, direct bonding of titanium to steel will produce a lot of intermetallic compounds at the interface, adversely affecting the bonding strength.
However, diffusion bonding is a good way to join dissimilar metals, it makes smaller macroscopic deformation, and will not cause damage to the mechanical properties of the base metal, however, the microstructure changes near the interface, the bonding strength is controlled by interface microstructure[2].
In addition to the diffusion temperature, another important factor influencing the microstructure and mechanical properties of joint is heat preservation time.
Fig. 11 Effect of diffusion temperature on shear strength Fig. 12 Effect of holding time on shear strength Conclusions The effect of diffusion bonding parameters on microstructure and mechanical properties of joints are studied.
Because of the difference between the physical and chemical properties of titanium and steel, such as melting point, linear expansion coefficient, direct bonding of titanium to steel will produce a lot of intermetallic compounds at the interface, adversely affecting the bonding strength.
However, diffusion bonding is a good way to join dissimilar metals, it makes smaller macroscopic deformation, and will not cause damage to the mechanical properties of the base metal, however, the microstructure changes near the interface, the bonding strength is controlled by interface microstructure[2].
In addition to the diffusion temperature, another important factor influencing the microstructure and mechanical properties of joint is heat preservation time.
Fig. 11 Effect of diffusion temperature on shear strength Fig. 12 Effect of holding time on shear strength Conclusions The effect of diffusion bonding parameters on microstructure and mechanical properties of joints are studied.
Online since: February 2020
Authors: Nguyen Van Duc, Nguyen Duc Thang, Trinh Van The
Because welding is a special process, all the factors that affect to welding quality must be identified, evaluated prior to production welding.
2.
Matching the mechanical properties of each type of material is important, as well.
Mechanical Properties of SS 304L and A 106B.
The welding essential variables are variables that have a significant affect on the mechanical properties of a joint.
Mechanical Properties for materials at 350 oC.
Matching the mechanical properties of each type of material is important, as well.
Mechanical Properties of SS 304L and A 106B.
The welding essential variables are variables that have a significant affect on the mechanical properties of a joint.
Mechanical Properties for materials at 350 oC.