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Online since: December 2013
Authors: Ashish D. Diwan, Frank Y. Zhou, Ai Qun Wei
Particularly, the focus will be on CDMP-2, a signaling molecule that has been found to possess properties that are therapeutic to disc degeneration.
The chief PG in the nucleus is aggrecan, which has strong osmotic properties to draw water into the disc [6].
A variety of sources have also proved the osteo-inducive properties of other BMPs, including BMP-4 and BMP-7 [70, 71].
Indeed, BMP-2 has been proven to induce a myriad of regenerative properties in IVD cells, including AF cell proliferation, increased proteoglycan synthesis in NP, and upregulated expression of PGs and TGF-β growth factors [73-75].
Chemoattractant properties of BMPs.
The chief PG in the nucleus is aggrecan, which has strong osmotic properties to draw water into the disc [6].
A variety of sources have also proved the osteo-inducive properties of other BMPs, including BMP-4 and BMP-7 [70, 71].
Indeed, BMP-2 has been proven to induce a myriad of regenerative properties in IVD cells, including AF cell proliferation, increased proteoglycan synthesis in NP, and upregulated expression of PGs and TGF-β growth factors [73-75].
Chemoattractant properties of BMPs.
Online since: September 2013
Authors: Sudipta Patra, Lokesh Kumar Singhal
This grade containing more than 5000 ppm of nitrogen was produced commercially through EAF-AOD-LRF-CC-Steckel mill route and its microstructure and mechanical properties were studied.
Microstructure and mechanical properties of hot rolled plates: Fig 3 shows the microstructure of as hot rolled plates of 50mm and 7mmt thicknesses and Fig.4 exhibits EBSD micrographs of 20mm and 7mm plates.
Mechanical properties and impact strength of as hot rolled plates are given in table-2 and table 3.
Table-2 Mechanical properties of hot rolled plates Thickness (mm) condition YS (MPa) UTS (MPa) EL (%) Impact energy at -40°C (J) Hardness (HV) 50 HR 550 830 52 271 320 20 HR 630 933 50 265 320 15 HR 790 960 45 273 325 7 HR 1032 1098 32 - 441 6 HR 1066 1157 26 - 441 Microstructure of the reheated sample: One sample was quenched after soaking at 11500C for 5 minutes and microstructure of the sample is given in Fig.5 Grain size of the sample is around 45µm.
Conclusion: 1) 18Cr18Mn0.5N high nitrogen stainless steel is successfully produced in industrial scale through EAF-AOD-LRF-CC route and excellent combination of mechanical properties is achieved in hot rolled plates. 2) Dynamic recrystallization has been observed in this high nitrogen steel in the temperature range 8000C to 11000C at strain rate of 5/S as well as 25/S when initial grain sizes is small.
Microstructure and mechanical properties of hot rolled plates: Fig 3 shows the microstructure of as hot rolled plates of 50mm and 7mmt thicknesses and Fig.4 exhibits EBSD micrographs of 20mm and 7mm plates.
Mechanical properties and impact strength of as hot rolled plates are given in table-2 and table 3.
Table-2 Mechanical properties of hot rolled plates Thickness (mm) condition YS (MPa) UTS (MPa) EL (%) Impact energy at -40°C (J) Hardness (HV) 50 HR 550 830 52 271 320 20 HR 630 933 50 265 320 15 HR 790 960 45 273 325 7 HR 1032 1098 32 - 441 6 HR 1066 1157 26 - 441 Microstructure of the reheated sample: One sample was quenched after soaking at 11500C for 5 minutes and microstructure of the sample is given in Fig.5 Grain size of the sample is around 45µm.
Conclusion: 1) 18Cr18Mn0.5N high nitrogen stainless steel is successfully produced in industrial scale through EAF-AOD-LRF-CC route and excellent combination of mechanical properties is achieved in hot rolled plates. 2) Dynamic recrystallization has been observed in this high nitrogen steel in the temperature range 8000C to 11000C at strain rate of 5/S as well as 25/S when initial grain sizes is small.
Online since: July 2012
Authors: Qing Liu, Yi Hui Zeng
In specific applications, depending on the application, the material properties can be linear or nonlinear.
Considering these factors, we do the following constraint processing: corresponding coupling processing of the contact constraint is done at the hinged position (hinged hole) of the two main beam and side beams, which is coupled in the FX direction.
Gravity Gravity is the distributed force; density has been added to its material properties, in ANSYS, only gravity acceleration values need to be given.
In addition, Reverse factors are considered as coefficient in the calculation of tower crane design, soin this paper we do not do the research about torsion of crane. 2.
BeiJing : Mechanical Industry Press .2003:1-183
Considering these factors, we do the following constraint processing: corresponding coupling processing of the contact constraint is done at the hinged position (hinged hole) of the two main beam and side beams, which is coupled in the FX direction.
Gravity Gravity is the distributed force; density has been added to its material properties, in ANSYS, only gravity acceleration values need to be given.
In addition, Reverse factors are considered as coefficient in the calculation of tower crane design, soin this paper we do not do the research about torsion of crane. 2.
BeiJing : Mechanical Industry Press .2003:1-183
Online since: October 2010
Authors: Berend Denkena, Hans Christian Möhring, Wolfram Acker, Evgeny Zaretskiy
Most of these regulations can possibly harm geometric
properties of the structure, e.g. by applying heat.
This leads to the idea of combining both strategies using the best properties of both techniques.
These factors lead to a wide variety of intensities in the camera picture.
The matching process is slowed down significantly by two factors.
A key issue is the quality control of modified components with respect to their shape, mechanical properties (stiffness, strength) as well as their durability.
This leads to the idea of combining both strategies using the best properties of both techniques.
These factors lead to a wide variety of intensities in the camera picture.
The matching process is slowed down significantly by two factors.
A key issue is the quality control of modified components with respect to their shape, mechanical properties (stiffness, strength) as well as their durability.
Online since: May 2013
Authors: Nigel A. Stone, Kerem Araci, M. Kamal Akhtar, Delphine Cantin, Damien Mangabhai
As such, it is imperative for titanium producers to understand and wherever possible, mitigate the risk of contamination to the material so that it maintains the required mechanical properties.
The initial powder properties are shown below.
Mechanical properties were also evaluated on the final sheet.
Powder properties play an important role in terms of being available for various powder metallurgy processing routes.
At this condition the powder feedstock reduces its mean particle size by a factor of 10 and affects both the bulk density and flowability accordingly.
The initial powder properties are shown below.
Mechanical properties were also evaluated on the final sheet.
Powder properties play an important role in terms of being available for various powder metallurgy processing routes.
At this condition the powder feedstock reduces its mean particle size by a factor of 10 and affects both the bulk density and flowability accordingly.
Online since: July 2020
Authors: Toto Sudiro, Nanang Sudrajat, Salim Mustofa, Sumaryo Sumaryo, Bambang Sugeng, Bambang Hermanto, Setyo Purwanto
This is showing the types of grain distributions which has good mechanical properties.
Whereas Sumitomo Special Metals Japan uses sintering techniques [1].Sintered NdFeB material requires very careful control of the sintering temperature and microstructure to achieve the magnetic properties required at the end of the sintered magnet [3,4].The final magnetic coercivity will be affected by grain size and material density [5-7].
In this work, an understanding in producing sintered using SPS and their relation to density, phase composition, and magnetic properties are investigated. 2.
Summary of data on the magnetic properties, density, and elements contained.
Seebacher et al., Grain-size dependent demagnetizing factors in permanent magnets, J.
Whereas Sumitomo Special Metals Japan uses sintering techniques [1].Sintered NdFeB material requires very careful control of the sintering temperature and microstructure to achieve the magnetic properties required at the end of the sintered magnet [3,4].The final magnetic coercivity will be affected by grain size and material density [5-7].
In this work, an understanding in producing sintered using SPS and their relation to density, phase composition, and magnetic properties are investigated. 2.
Summary of data on the magnetic properties, density, and elements contained.
Seebacher et al., Grain-size dependent demagnetizing factors in permanent magnets, J.
Online since: February 2017
Authors: Suwannee Luppanapornlarp, Peerapong Santiwong, Katha Kosayadiloka, Nathaphon Tangjit
Malkoc et al. (2012) demonstrated that these cytotoxic effects were dependent on several factors including the composition, surface, and size of the particles [15].
Mizoguchi, Torsional properties and microstructures of miniscrew implants, Am.
Niinomi, Mechanical properties of biomedical titanium alloys, Mater.
Lin, Effects of thread depth, taper shape, and taper length on the mechanical properties of mini-implants, Am.
Tateishi, Corrosion resistance, mechanical properties, corrosion fatigue strength and cytocompatibility of new Ti alloys without Al and V, Biomater. 19(13) (1998) 1197-215
Mizoguchi, Torsional properties and microstructures of miniscrew implants, Am.
Niinomi, Mechanical properties of biomedical titanium alloys, Mater.
Lin, Effects of thread depth, taper shape, and taper length on the mechanical properties of mini-implants, Am.
Tateishi, Corrosion resistance, mechanical properties, corrosion fatigue strength and cytocompatibility of new Ti alloys without Al and V, Biomater. 19(13) (1998) 1197-215
Online since: December 2011
Authors: Dian Hua Zhang, Liang Gui Peng, Fang Xu, En Yang Liu, Xianghua Liu
Introduction
Coiling temperature is a very important factor to determine the mechanical properties of hot rolled strips such as tensile strength, yield stress and elongation of steels.
Purpose of coiling temperature control (CTC) is to keep coiling temperature and/or cooling rate, cooling route as their targets which are requested to achieve material properties and microstructures.
When strip cooling on run out table, cooling performance is much affected by heat transfer between strip and cooling medium such as air convection, heat radiation, spray cooling, and also by upstream control results such as strip speed changes, strip finishing temperature deviation and strip flatness.
However, emissivity of strip is affected by many factors such as steel grade, thickness and temperature.
Purpose of coiling temperature control (CTC) is to keep coiling temperature and/or cooling rate, cooling route as their targets which are requested to achieve material properties and microstructures.
When strip cooling on run out table, cooling performance is much affected by heat transfer between strip and cooling medium such as air convection, heat radiation, spray cooling, and also by upstream control results such as strip speed changes, strip finishing temperature deviation and strip flatness.
However, emissivity of strip is affected by many factors such as steel grade, thickness and temperature.
Online since: December 2013
Authors: Shi Dong Hu, Jian Liang Zhou, Bin En Nie
Modification of Biomaterials
Applications of Natural Extracellular Matrix
Natural extracellular matrix not only provides structural support, but also mediates cell anchoring and behavior of growth factors and signal peptides.
All of the spatial structures of the extracellular matrix, the ultrastructure, surface morphology, density and the biochemical properties determine its mechanical properties, reactivity to cells and subsequent tissue construction.
Biomaterial Functional Modification by Protein or Peptide Biomaterial functional modification by proteins or peptides should consider both the type of biomaterial as well as the, properties of the proteins or peptides.
[42] Bunting S., Moncada S., Vane J.R.: Antithrombotic properties of vascular endothelium.
[50] Avci-Adali M., Paul A., Ziemer G., et al: New strategies for in vivo tissue engineering by mimicry of homing factors for self-endothelialization of blood contacting materials.
All of the spatial structures of the extracellular matrix, the ultrastructure, surface morphology, density and the biochemical properties determine its mechanical properties, reactivity to cells and subsequent tissue construction.
Biomaterial Functional Modification by Protein or Peptide Biomaterial functional modification by proteins or peptides should consider both the type of biomaterial as well as the, properties of the proteins or peptides.
[42] Bunting S., Moncada S., Vane J.R.: Antithrombotic properties of vascular endothelium.
[50] Avci-Adali M., Paul A., Ziemer G., et al: New strategies for in vivo tissue engineering by mimicry of homing factors for self-endothelialization of blood contacting materials.
Research on the Characteristics of PMSM Vector Control System Based on Speed Sliding Mode Controller
Online since: October 2011
Authors: Hui Fan, Yi Chao Wang
In the actual permanent magnet synchronous motor servo system, the load changes are a major factor that affects system performance.
Voltage equation is: (1) Flux equation is: (2) For surface PMSM, Ld=Lq=L,torque equation is: (3) Mechanical equation of motion is: (4) In the above equations, ud, uq, id, iq, Ld, Lq are the voltage and current of axis d and axis q. r is the stator resistance. np is the pole pairs of motor. ψf is the flux of permanent magnet and the stator cross chain.
Different m can get different dynamic properties
Voltage equation is: (1) Flux equation is: (2) For surface PMSM, Ld=Lq=L,torque equation is: (3) Mechanical equation of motion is: (4) In the above equations, ud, uq, id, iq, Ld, Lq are the voltage and current of axis d and axis q. r is the stator resistance. np is the pole pairs of motor. ψf is the flux of permanent magnet and the stator cross chain.
Different m can get different dynamic properties