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Online since: June 2010
Authors: Amanda Karine Andriola Silva, Erica Lira Silva, Juliana Fernandes Carvalho, Thales Renan Ferreira Pontes, Rafael Pereira de Araújo Neto, Artur da Silva Carriço, Eryvaldo Sócrates Tabosa Egito
As addressed in the section "Magnetic
Carriers - Properties and In Vivo Fate," the size, charge, and surface chemistry of the magnetic
particles are particularly important in affecting both blood circulation time as well as bioavailability
of the particles within the body [12].
Certain key factors guide the choice of formulations and the technical details of the hyperthermia procedure.
The most important intrinsic factors are proton relaxation and the proton density of the tissue.
Besides, special care should be focused on the particle size, surface properties, magnetic properties, and administration route, for example.
Vergallo, in: Environmental Factors Affecting Phagocytosis of Dying Cells: Smoking and Static Magnetic Fields, edited by D.
Certain key factors guide the choice of formulations and the technical details of the hyperthermia procedure.
The most important intrinsic factors are proton relaxation and the proton density of the tissue.
Besides, special care should be focused on the particle size, surface properties, magnetic properties, and administration route, for example.
Vergallo, in: Environmental Factors Affecting Phagocytosis of Dying Cells: Smoking and Static Magnetic Fields, edited by D.
Online since: December 2024
Authors: Mukaila Abiola Anifowose, Akeem Ayinde Raheem
Numerous factors, including the calibre of the component materials, the manufacturing process used, the length of the curing period, and the shapes and sizes of the blocks, affect the quality of sandcrete blocks [8-11].
Hence, there is a need for further studies on how RHA fineness, RHA contents, and prolonged curing age affect the properties of hollow sandcrete blocks.
Oduoye, Mechanical properties of high-performance concrete with guinea corn husk ash as additives, LAUTECH J.
Karim, Mechanical Properties of Brick Aggregate Concrete Containing Rice Husk Ash as a Partial Replacement of Cement, J.
Islam, Comparative study of pozzolanic and filler effect of rice husk ash on the mechanical properties and microstructure of brick aggregate concrete, Heliyon 5 (2019) e01926
Hence, there is a need for further studies on how RHA fineness, RHA contents, and prolonged curing age affect the properties of hollow sandcrete blocks.
Oduoye, Mechanical properties of high-performance concrete with guinea corn husk ash as additives, LAUTECH J.
Karim, Mechanical Properties of Brick Aggregate Concrete Containing Rice Husk Ash as a Partial Replacement of Cement, J.
Islam, Comparative study of pozzolanic and filler effect of rice husk ash on the mechanical properties and microstructure of brick aggregate concrete, Heliyon 5 (2019) e01926
Online since: February 2021
Authors: Prithu Mishra, Shruti Sood, Pradeep Khanna, Mayank Pandit
Powder and extrusion-based techniques produce porous structures with poor mechanical properties.
These processes can bring about desired improvements in porosity levels, precipitate phases, grain size, grain orientation and mechanical properties [69].
AM Technology Post Processing Technique Improved Properties 1.
Selective Laser Sintering (SLS) Infiltration using polymer infiltrates [76] Elimination of voids and improved mechanical strength Metal Coating [91] Improved mechanical and electrical properties 4.
The build time for a model in AM or an individual assembly depends on factors like part size, layer thickness, build orientation and printing speed.
These processes can bring about desired improvements in porosity levels, precipitate phases, grain size, grain orientation and mechanical properties [69].
AM Technology Post Processing Technique Improved Properties 1.
Selective Laser Sintering (SLS) Infiltration using polymer infiltrates [76] Elimination of voids and improved mechanical strength Metal Coating [91] Improved mechanical and electrical properties 4.
The build time for a model in AM or an individual assembly depends on factors like part size, layer thickness, build orientation and printing speed.
Online since: December 2016
Authors: Philippe Bocher, Hamid Javadi, Myriam Brochu, Walid Jomaa, Damien Texier
Surface Roughness Effects on the Fatigue Behavior of As-Machined Inconel718
Hamid Javadi1,a, Walid Jomaa1,2,b, Damien Texier1,c, Myriam Brochu3,d
and Philippe Bocher1,e
1 Mechanical Engineering Department, École de Technologie Supérieure, 1100 Rue Notre-Dame Ouest, Montréal, H3C 1K3, Québec, Canada
2 Mechanical Engineering Department, Laval University, 2325 Rue de l’université, Québec, G1V 0A6, Québec, Canada
3 Mechanical Engineering Department, École Polytechnique de Montréal, 2900 Boulevard Édouard-MontPetit, Montréal, H3T 1J4, Québec, Canada
*ahamid.javadi.1@ens.etsmtl.ca, bwalid.jomaa.1@ulaval.ca, cdamien.texier.1@ens.etsmtl.ca, dm.brochu@polymtl.ca, ephilippe.bocher@etsmtl.ca
Keywords: Inconel718, high cycle fatigue life, turning, surface roughness, crack path.
Introduction Wrought Inconel718 (In718) is a commonly used nickel-base superalloy for the fabrication of massive rotating components due to its excellent mechanical properties and corrosion resistance, especially at high temperatures [1].
Surface integrity induced by machining is particularly important for critical structural components subjected to alternative stresses in service and is well known to strongly affect fatigue life, especially in the low stress amplitude, high cycle fatigue regime [3].
In general, height roughness parameters exhibit a better correlation with HCF life, in agreement with [5], suggesting that fatigue stress concentration factors are well described by these parameters.
The limited number of the HCF tests (three) performed for each condition and the corresponding dispersions are likely to affect the Adj.R2 negatively.
Introduction Wrought Inconel718 (In718) is a commonly used nickel-base superalloy for the fabrication of massive rotating components due to its excellent mechanical properties and corrosion resistance, especially at high temperatures [1].
Surface integrity induced by machining is particularly important for critical structural components subjected to alternative stresses in service and is well known to strongly affect fatigue life, especially in the low stress amplitude, high cycle fatigue regime [3].
In general, height roughness parameters exhibit a better correlation with HCF life, in agreement with [5], suggesting that fatigue stress concentration factors are well described by these parameters.
The limited number of the HCF tests (three) performed for each condition and the corresponding dispersions are likely to affect the Adj.R2 negatively.
Online since: May 2004
Authors: J. Budinski-Simendić, Z.Lj. Petrović, V. Lazić, R. Radičević, V. Divjaković
The degree of crystallization and regularity
of crystallite size have noticeable effects on the properties of bulk polypropylene.
Control of crystallization and crystallite size could impart unique properties of thin films.
The addition of heterogeneous nucleating agents is a widely used way of controlling the application properties.
Mechanical and optical properties as well as cycle-time in processing and the post-processing behavior can be influenced by a variety of substances.
This multilevel structure causes rather unique properties, which vary with the thermal and mechanical history of the materials.
Control of crystallization and crystallite size could impart unique properties of thin films.
The addition of heterogeneous nucleating agents is a widely used way of controlling the application properties.
Mechanical and optical properties as well as cycle-time in processing and the post-processing behavior can be influenced by a variety of substances.
This multilevel structure causes rather unique properties, which vary with the thermal and mechanical history of the materials.
Online since: August 2019
Authors: Zhan Ping Zhang, Yu Hong Qi, Ke Jiao Li, Xu Zhao
The morphology, properties and applications of polyether PUA are determined by the microphase separation.
Cooper, Morphology and properties of segmented copolymers, American Chemical Society: USA,1979, pp. 3-30
Meadows, et al, Model MDI/butanediol polyurethanes: molecular structure, morphology, physical and mechanical properties, J.
Nomura, Structure and properties of fatigued segmented poly (urethaneurea) s Ⅲ.
Ko, Structure and thermal properties of polyether polyurethaneurea elastomers, J.
Cooper, Morphology and properties of segmented copolymers, American Chemical Society: USA,1979, pp. 3-30
Meadows, et al, Model MDI/butanediol polyurethanes: molecular structure, morphology, physical and mechanical properties, J.
Nomura, Structure and properties of fatigued segmented poly (urethaneurea) s Ⅲ.
Ko, Structure and thermal properties of polyether polyurethaneurea elastomers, J.
Online since: January 2021
Authors: Evgeniy A. Yakovlev, Mikhail S. Lebedev, M.I. Kozhukhova
Most of the studies consider the effect of one, rarely two or three factors on the asphalt binder.
In the case of small particle and small pore size the number of phase contacts between particles is very large, which affects strength performance of any powder systems and physical and mechanical properties of bitumen-mineral materials [31].
Mulenko, Study of physical-mechanical properties of asphalt-concrete specimens on activated mineral powders of various compositions, Construction Materials and Products. 1(4) (2018) 44–50 [14] M.
Kuznetsov, Features of the surface properties of acidic mineral materials for asphalt concrete, Construction materials. 8 (2007) 56–57 [23] Y.
Prokopets, Structure and properties of asphalt binders based on mineral fillers of different nature, Construction materials. 5 (2010) 32–35
In the case of small particle and small pore size the number of phase contacts between particles is very large, which affects strength performance of any powder systems and physical and mechanical properties of bitumen-mineral materials [31].
Mulenko, Study of physical-mechanical properties of asphalt-concrete specimens on activated mineral powders of various compositions, Construction Materials and Products. 1(4) (2018) 44–50 [14] M.
Kuznetsov, Features of the surface properties of acidic mineral materials for asphalt concrete, Construction materials. 8 (2007) 56–57 [23] Y.
Prokopets, Structure and properties of asphalt binders based on mineral fillers of different nature, Construction materials. 5 (2010) 32–35
Online since: September 2011
Authors: Aleksandar Sedmak, Miodrag Arsić, B. Medjo, Ž. Šarkoćević, I. Ivanović, Marko Rakin
Linear elastic stress intensity factors for circumferential and axial part-through surface cracked cylindrical geometries are considered in literature, e.g. [1,2].
The result is compared with nonlinear finite element results, which enable assessment of the fracture mechanics parameters for various crack configurations, material properties and loading conditions.
Material properties Chemical composition of API J55 steel, used for fabricating the examined pipe, is given in Table 1, while Table 2 contain its tensile properties.
Tensile properties of API J55 steel [4] σ0.2 [MPa] σm [MPa] A [%] 380 562 33 Testing of the surface-cracked pipe Experimental testing is conducted on pressurized vessel with a machined axial external surface crack in the base material.
This method is regarded as more universal in comparison with the standard ones, having in mind that the specimen shape and dimensions do not affect the results significantly.
The result is compared with nonlinear finite element results, which enable assessment of the fracture mechanics parameters for various crack configurations, material properties and loading conditions.
Material properties Chemical composition of API J55 steel, used for fabricating the examined pipe, is given in Table 1, while Table 2 contain its tensile properties.
Tensile properties of API J55 steel [4] σ0.2 [MPa] σm [MPa] A [%] 380 562 33 Testing of the surface-cracked pipe Experimental testing is conducted on pressurized vessel with a machined axial external surface crack in the base material.
This method is regarded as more universal in comparison with the standard ones, having in mind that the specimen shape and dimensions do not affect the results significantly.
Online since: August 2014
Authors: Hendra Hermawan, Nur Najiha Saarani, K. Jamuna-Thevi, Ida Idayu Muhammad
Antibacterial Properties of Guided Bone Regeneration Membrane for Periodontal Applications
N.
This study aims to assess antibacterial properties of recently developed three-layered poly(lactic-co-glycolic acid) (PLGA) /lauric acid (LA) composite membrane towards Staphylococcus aureus.
This membrane holds promise for antimicrobial properties against Staphylococcus aureus, the most commonly found bacteria in nosocomial infections.
Song, “Novel starch/chitosan blending membrane: Antibacterial, permeable and mechanical properties,” Carbohydrate Polymers, vol. 78, no. 1, pp. 146-150, Aug. 2009
Genco, “Clinical, microbiological, and histological factors which influence the success of regenerative periodontal therapy.,” Journal of periodontology, vol. 65, no. 2. pp. 154-61, Feb-1994
This study aims to assess antibacterial properties of recently developed three-layered poly(lactic-co-glycolic acid) (PLGA) /lauric acid (LA) composite membrane towards Staphylococcus aureus.
This membrane holds promise for antimicrobial properties against Staphylococcus aureus, the most commonly found bacteria in nosocomial infections.
Song, “Novel starch/chitosan blending membrane: Antibacterial, permeable and mechanical properties,” Carbohydrate Polymers, vol. 78, no. 1, pp. 146-150, Aug. 2009
Genco, “Clinical, microbiological, and histological factors which influence the success of regenerative periodontal therapy.,” Journal of periodontology, vol. 65, no. 2. pp. 154-61, Feb-1994
Online since: January 2012
Authors: Xiao Hua Wang, Bao Tang, Bing Wen Li, Jian Wu Wang
Design for cost (DFC)means to reduce costs as much as possible in the premise of meeting user needs, and modify parts of the high cost by analyzing and studying design, manufacture, assembly, detection, sale, use, maintenance, recycling and retirement and other cost factors in the full product life cycle, ultimately reduce costs.
DFC technology can be used early in the design phase to consider product performance, quality, manufacturability, assembly, product service and price and other factors, and optimize the product design or redesign.
Green Design (GD) is a new design technology integrated with product features, quality, life and the environment [5].In the design phase, environmental factors and measures to prevent pollution will be incorporated into product designs, in order to make maximal use of resources and energy, reduce or eliminate the negative impact on the environment.
As the traction components, wire rope is one of the consumables which require frequent replacement in the endless rope winch, its service life will affect the cost and safety of coal production directly, must be given adequate attention.
For example, gear pair in the gearbox could try to use the same material on the premise of meeting the strength requirements, by using different methods of heat treatment to obtain the required material properties, so as to facilitate recycling.
DFC technology can be used early in the design phase to consider product performance, quality, manufacturability, assembly, product service and price and other factors, and optimize the product design or redesign.
Green Design (GD) is a new design technology integrated with product features, quality, life and the environment [5].In the design phase, environmental factors and measures to prevent pollution will be incorporated into product designs, in order to make maximal use of resources and energy, reduce or eliminate the negative impact on the environment.
As the traction components, wire rope is one of the consumables which require frequent replacement in the endless rope winch, its service life will affect the cost and safety of coal production directly, must be given adequate attention.
For example, gear pair in the gearbox could try to use the same material on the premise of meeting the strength requirements, by using different methods of heat treatment to obtain the required material properties, so as to facilitate recycling.