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Online since: July 2011
Authors: Zhi Huang, Yun Huang, Hai Long Wu, G.J. Cheng
The paper deals with some major factors which influence material removal rate under constant pressure grinding method, such as abrasive type, belt speed, the normal grinding force, type of grinding fluid, with 3 different kinds of abrasive belt.
Test materials use 1Cr13 stainless steel, which’s sample size is 28mm × 300mm, and its main chemical composition and mechanical property are shown in Table 1.
Repeat experiment 5 times and observe the average in order to eliminate the effect of random factors and improve the reliability of the results.
Table 1 Chemical composition and mechanical property of 1Cr13 stainless steel chemical composition wt% C 0.23 Mn 0.53 P 0.021 S 0.015 Si 0.54 Ni 0.15 Cr 12.77 mechanical properties σb[MP] 758 Δ[%] 22.5 Ψ[%] 65 HB 22.5 αk[J·cm-2] 175 Λ[W/m·K] 24.2(100ºC) Results and Discussions Effect of Belt Speed on Material Removal Rate.
Conclusion The material removal rate is significantly affected by abrasive types.
Test materials use 1Cr13 stainless steel, which’s sample size is 28mm × 300mm, and its main chemical composition and mechanical property are shown in Table 1.
Repeat experiment 5 times and observe the average in order to eliminate the effect of random factors and improve the reliability of the results.
Table 1 Chemical composition and mechanical property of 1Cr13 stainless steel chemical composition wt% C 0.23 Mn 0.53 P 0.021 S 0.015 Si 0.54 Ni 0.15 Cr 12.77 mechanical properties σb[MP] 758 Δ[%] 22.5 Ψ[%] 65 HB 22.5 αk[J·cm-2] 175 Λ[W/m·K] 24.2(100ºC) Results and Discussions Effect of Belt Speed on Material Removal Rate.
Conclusion The material removal rate is significantly affected by abrasive types.
Online since: February 2023
Authors: Jon Affi, Gunawarman Gunawarman, Yuli Yetri, Sanny Ardhy
One of factor causing the failure of Ti-6Al-4V Extra Low Interstitial (ELI)-based material implants, does not have bioactive properties in the implantation process, thus not supporting the osseointegration process in the body.
Its mechanical properties are better than pure titanium (CpTi) and Ti-6Al-4V.
Cracks in the HA layer were caused by the ceramic properties, which had low fracture toughness at high sintering temperatures.
Electrophoretic deposition (EPD) of nano-hydroxyapatite coatings with improved mechanical properties on prosthetic Ti6Al4V substrates.
Effects of TiO2 on microstructural, mechanical properties and in-vitro bioactivity of plasma sprayed yttria stabilised zirconia coatings for dental application.
Its mechanical properties are better than pure titanium (CpTi) and Ti-6Al-4V.
Cracks in the HA layer were caused by the ceramic properties, which had low fracture toughness at high sintering temperatures.
Electrophoretic deposition (EPD) of nano-hydroxyapatite coatings with improved mechanical properties on prosthetic Ti6Al4V substrates.
Effects of TiO2 on microstructural, mechanical properties and in-vitro bioactivity of plasma sprayed yttria stabilised zirconia coatings for dental application.
Online since: December 2009
Authors: Matthias Kammler
Especially in these processes the mechanical properties and in particular the
strength and deformability of the extrudates are of great interest.
These properties are mostly related to the microstructure development of the alloy during the whole production cycle from billet casting to profile aging [8].
The microstructure evolution and thus the properties of extruded aluminum products are significantly influenced by the way the metal flows during extrusion.
Many investigations were carried out for the numerical simulation of extrusion processes in order to predict the microstructure evolution and the related mechanical properties of the extrudates.
A friction factor m = 0.5 was chosen.
These properties are mostly related to the microstructure development of the alloy during the whole production cycle from billet casting to profile aging [8].
The microstructure evolution and thus the properties of extruded aluminum products are significantly influenced by the way the metal flows during extrusion.
Many investigations were carried out for the numerical simulation of extrusion processes in order to predict the microstructure evolution and the related mechanical properties of the extrudates.
A friction factor m = 0.5 was chosen.
Online since: December 2014
Authors: Martina Ivašková, Peter Koteš, Ján Kozák
The result of this physicochemical reaction is a permanent change of the material that changes chemical, physical and mechanical properties.
The actual exhibition of corrosion attack is usually very diverse and depends on the nature of metal, glass, polymers, composites, environment and all external and internal factors, which have an impact on the material [1,3,4].
Degradation of materials in Europe caused by sulfur compounds is much lower today; despite the measures, air pollution is still a difficult problem, because many other factors causing increased corrosion loss of conventional materials are still used in human life [7-9].
The objective of this program is to quantitatively assess the impact of air multi-pollution, such as ozone, particulate matter, sulfur and nitrogen compounds and other substances, as well as evaluating parameters affecting atmospheric corrosion and pollution of major materials used in the construction and reconstruction of constructions and cultural heritage objects.
Černý, The corrosion properties of metallic structural materials, STNL Praha, Praha, 1984.
The actual exhibition of corrosion attack is usually very diverse and depends on the nature of metal, glass, polymers, composites, environment and all external and internal factors, which have an impact on the material [1,3,4].
Degradation of materials in Europe caused by sulfur compounds is much lower today; despite the measures, air pollution is still a difficult problem, because many other factors causing increased corrosion loss of conventional materials are still used in human life [7-9].
The objective of this program is to quantitatively assess the impact of air multi-pollution, such as ozone, particulate matter, sulfur and nitrogen compounds and other substances, as well as evaluating parameters affecting atmospheric corrosion and pollution of major materials used in the construction and reconstruction of constructions and cultural heritage objects.
Černý, The corrosion properties of metallic structural materials, STNL Praha, Praha, 1984.
Online since: September 2018
Authors: Viktor Zhuravlev, Anna Nevmyvaka, Volya Itin, Dmitry Velikanov
The influence of the annealing temperature on the properties of synthesized materials is analyzed.
Results of investigations the phase composition, structural parameters, and magnetic properties of the synthesized materials are presented.
Physical properties of ferrimagnetic oxides in relation to their technical applications, Philips’ Technical Library, 1959
Pullar, Hexagonal ferrites: A review of the synthesis, properties and applications of hexaferrite ceramics, Progress in Materials Science 57 (2012) 1191-1334
Maksimov, Mechanochemical synthesis of nanoferrimagnetic, their magnetic properties, application in medicine, in: E.
Results of investigations the phase composition, structural parameters, and magnetic properties of the synthesized materials are presented.
Physical properties of ferrimagnetic oxides in relation to their technical applications, Philips’ Technical Library, 1959
Pullar, Hexagonal ferrites: A review of the synthesis, properties and applications of hexaferrite ceramics, Progress in Materials Science 57 (2012) 1191-1334
Maksimov, Mechanochemical synthesis of nanoferrimagnetic, their magnetic properties, application in medicine, in: E.
Online since: February 2011
Authors: Fuh Kuo Chen, Shin Gee Chen
The ring compression tests [3] were also conducted to obtain the friction factors at the die-workpiece interface at various temperatures.
The stress-strain relations and the friction factors obtained from the experimental results were then employed by the finite element analysis to examine the material flow during the press forging process.
The material properties and the friction factors at various temperatures obtained form the previous experiments were adopted in the finite element simulations.
The friction factors m = 0.2, 0.4, and 0.7 obtained in the ring compression tests for three different lubrication conditions were adopted in the finite element simulations, and the material properties of AZ31 magnesium-alloy at forming temperature of 300oC was selected for all simulations.
Concluding Remarks The finite element analysis indicates that the formation of embossments in a press forging process is affected by the friction condition at the die-workpiece interface, the location of embossments, and the tooling design.
The stress-strain relations and the friction factors obtained from the experimental results were then employed by the finite element analysis to examine the material flow during the press forging process.
The material properties and the friction factors at various temperatures obtained form the previous experiments were adopted in the finite element simulations.
The friction factors m = 0.2, 0.4, and 0.7 obtained in the ring compression tests for three different lubrication conditions were adopted in the finite element simulations, and the material properties of AZ31 magnesium-alloy at forming temperature of 300oC was selected for all simulations.
Concluding Remarks The finite element analysis indicates that the formation of embossments in a press forging process is affected by the friction condition at the die-workpiece interface, the location of embossments, and the tooling design.
Online since: March 2020
Authors: Stephen O. Ekolu, Zaid Mohamed, Sean Kay
Generally, mechanical and structural properties of RCA concretes are known to be inferior to those of natural aggregate concretes.
Consistent with the adverse effects of using RCA in concrete, leading to inferior mechanical properties, studies also show the durability characteristics of RCA concretes to be similarly adversely affected.
Saha, Effect of Recycled Aggregate on Mechanical and Durability Properties of Concrete, Intl.
Zhang, Mechanical properties of recycled aggregate concrete under uniaxial loading, Cem. and Concr.
Degeimbre, Mechanical and durability properties of concrete using contaminated RAs, Cem. and Concr.
Consistent with the adverse effects of using RCA in concrete, leading to inferior mechanical properties, studies also show the durability characteristics of RCA concretes to be similarly adversely affected.
Saha, Effect of Recycled Aggregate on Mechanical and Durability Properties of Concrete, Intl.
Zhang, Mechanical properties of recycled aggregate concrete under uniaxial loading, Cem. and Concr.
Degeimbre, Mechanical and durability properties of concrete using contaminated RAs, Cem. and Concr.
Research on the Selection of Materials as Oil and Water Separating Membrane for Underwater Oil Tanks
Online since: February 2013
Authors: Song Sen Xu, Shi Hua Zhang, Yu Guang Cao
Put the materials in the oven with the temperature of 70°C for 168 hours and test the change of mass and corresponding mechanical properties.
4.
Perform fatigue tests for the materials with the 1040 cycles and test the change of corresponding mechanical properties. 2.3 Analysis of experimental results The original mechanical properties of the four coating fabrics are shown in Table 1.
Table 3 showed the change of mechanical properties of polyurethane coated fabrics after oil immersion.
Table 4 showed the change of mechanical properties of polyurethane coated fabrics after thermal ageing.
On the contrary, the mechanical properties of polyurethane coated fabrics are much better than those of glass fiber cloth coated with silica gel.
Perform fatigue tests for the materials with the 1040 cycles and test the change of corresponding mechanical properties. 2.3 Analysis of experimental results The original mechanical properties of the four coating fabrics are shown in Table 1.
Table 3 showed the change of mechanical properties of polyurethane coated fabrics after oil immersion.
Table 4 showed the change of mechanical properties of polyurethane coated fabrics after thermal ageing.
On the contrary, the mechanical properties of polyurethane coated fabrics are much better than those of glass fiber cloth coated with silica gel.
Online since: March 2008
Authors: Wei Li, Liu Zhu Chen, Peng Sha Pang
On the other hand, the hydroxyapatite (Ca10(PO4)6(OH)2, HA) is bioactive with hard
tissues of human beings and exhibits osseoconductive properties.
So it can be estimated that the nucleation and growth of HA crystals are affected by two factors: the concentration fluctuation and diffusion assistance of Ca and P.
It indicates that the mechanical restrict force plays an important part for the bonding of HA and TiO2.
It may be explained by two factors.
When the surface roughness increases to some degree, the effect of mechanical restrict force can be neglected.
So it can be estimated that the nucleation and growth of HA crystals are affected by two factors: the concentration fluctuation and diffusion assistance of Ca and P.
It indicates that the mechanical restrict force plays an important part for the bonding of HA and TiO2.
It may be explained by two factors.
When the surface roughness increases to some degree, the effect of mechanical restrict force can be neglected.
Online since: November 2017
Authors: Ahmed Zaki Farahat, Sherif Ali Abd El Rahman, Taha Mattar, Mohamed K. Elfawkhry, Ahmed Y. Shash
Mechanical properties in terms of hardness and microhardness of obtained phases and structure were investigated.
Such an advanced structure leads to enhancement in the whole mechanical properties of the high carbon steel.
The microstructure and the mechanical properties were investigated.
Much increment of aluminum generates a fraction of polygonal ferrite which will cause a deteriorative effect on the whole mechanical properties.
[16] Mohamed Soliman, Heinz Palkowski, "Microstructure development and mechanical properties of medium carbon carbide-free bainite steels," vol.
Such an advanced structure leads to enhancement in the whole mechanical properties of the high carbon steel.
The microstructure and the mechanical properties were investigated.
Much increment of aluminum generates a fraction of polygonal ferrite which will cause a deteriorative effect on the whole mechanical properties.
[16] Mohamed Soliman, Heinz Palkowski, "Microstructure development and mechanical properties of medium carbon carbide-free bainite steels," vol.