Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: July 2019
Authors: Vincent Ji, Thierry Baudin, François Brisset, Anne Laure Helbert, Fazati Bourahima, Michel Rege, Arnaud Courteaux
These cracks are often due to the Heat Affected Zone which creates structural stresses linked to the development of a martensitic structure in the ferritic matrix of the lamellar graphite cast iron.
The microstructure and the mechanical properties were studied around the interface cladding/substrate.
Researchers [5] have observed Heat Affected Zones (HAZ) represented by needle-like martensite around graphite on GCI substrate after laser cladding [6].
Range of processing parameters used in the laser cladding experiments Factors Parameters P [W] v [mm/s] PFR [g/min] Values 1500 - 3000 2.5 - 10 24.5 – 32.5 Details of this technique are given in a previous published work [1]. 14 samples were used for this statistical study.
De Hosson, Effects of the alloy composition on phase constitution and properties of laser deposited Ni-Cr-B-Si coatings, Phys.
The microstructure and the mechanical properties were studied around the interface cladding/substrate.
Researchers [5] have observed Heat Affected Zones (HAZ) represented by needle-like martensite around graphite on GCI substrate after laser cladding [6].
Range of processing parameters used in the laser cladding experiments Factors Parameters P [W] v [mm/s] PFR [g/min] Values 1500 - 3000 2.5 - 10 24.5 – 32.5 Details of this technique are given in a previous published work [1]. 14 samples were used for this statistical study.
De Hosson, Effects of the alloy composition on phase constitution and properties of laser deposited Ni-Cr-B-Si coatings, Phys.
Online since: August 2011
Authors: Yan Zhen Yu, Long Long Gao, Juan Tan
Because grain slag and the coal gangue used as the experimental materials were all belonging to the barren material, the method of pressure molding was used in this experiment considering the forming properties of the test sample.
The factors that influence sintered brick mainly are the proportioning of raw material , the molding pressure, the sintering temperature, holding time [3,4].
Now all the factors and the levels ware listed random in Table 2, results in Table 3.
Conclusion The grain slag is one waste slag with poor mechanical properties,the grain slag is combined with YellowRiver silt and coal gangue under certain technological parameter level, we can get the grain slag brick which can satisfy the demands of MU30 grade in the standard of GB5101- 2003.
The study of strength and pore structure properties of slag-fly ash blended cement with low clinker, New Build.
The factors that influence sintered brick mainly are the proportioning of raw material , the molding pressure, the sintering temperature, holding time [3,4].
Now all the factors and the levels ware listed random in Table 2, results in Table 3.
Conclusion The grain slag is one waste slag with poor mechanical properties,the grain slag is combined with YellowRiver silt and coal gangue under certain technological parameter level, we can get the grain slag brick which can satisfy the demands of MU30 grade in the standard of GB5101- 2003.
The study of strength and pore structure properties of slag-fly ash blended cement with low clinker, New Build.
Online since: May 2025
Authors: Le Dinh An, Pham Quang Trung
Thus, the thermal properties of the AA7075, such as thermal conductivity and the coefficient of thermal expansion, are considered temperature-dependent.
Significant plastic deformation occurs in FSW due to the tool-workpiece interaction, essential for shaping the welded connection and affecting the weld's presence of defects.
Luan, Investigation of microstructures and fatigue properties of friction stir welded Al–Mg alloy, Materials Chemistry and Physics 98 (2006) 285-290
Prasad, Effect of Tool Rotational Speed on Mechanical Properties Of Aluminium Alloy 5083 Weldments in Friction Stir Welding, Materials Today: Proceedings 5 (2018) 18535-18543
Derazkola, Investigation of the Effects of Tool Positioning Factors on Peak Temperature in Dissimilar Friction Stir Welding of AA6061-T6 and AA7075-T6 Aluminum Alloys, Materials (2022)
Significant plastic deformation occurs in FSW due to the tool-workpiece interaction, essential for shaping the welded connection and affecting the weld's presence of defects.
Luan, Investigation of microstructures and fatigue properties of friction stir welded Al–Mg alloy, Materials Chemistry and Physics 98 (2006) 285-290
Prasad, Effect of Tool Rotational Speed on Mechanical Properties Of Aluminium Alloy 5083 Weldments in Friction Stir Welding, Materials Today: Proceedings 5 (2018) 18535-18543
Derazkola, Investigation of the Effects of Tool Positioning Factors on Peak Temperature in Dissimilar Friction Stir Welding of AA6061-T6 and AA7075-T6 Aluminum Alloys, Materials (2022)
Online since: December 2009
Authors: Alex Baume, Nick Coleman, Philip Boughton
A
bioburden test method relying on mechanical agitation was established.
The medical device itself and its application will also affect the package design.
Loss of hydration during packaging and shelf-life causes changes in scaffold architecture and leaching of growth factors [16].
These were classified based on their macroscopic properties and labelled A - F Table 2).
Plikk, P., et al., Finalizing the properties of porous scaffolds of aliphatic polyesters through radiation sterilization.
The medical device itself and its application will also affect the package design.
Loss of hydration during packaging and shelf-life causes changes in scaffold architecture and leaching of growth factors [16].
These were classified based on their macroscopic properties and labelled A - F Table 2).
Plikk, P., et al., Finalizing the properties of porous scaffolds of aliphatic polyesters through radiation sterilization.
Online since: May 2011
Authors: Qing Wei Ding, Tian Wei Qian, Hong Fang Liu, Xue Wang
Using its unique surface effect and the small size effect, zero-valent iron (ZVI) nanoparticles can increase the reactivity and efficiency, so the mechanical properties, etc. are very different from ordinary materials, it has a unique advantage catalytic, adsorption, and other new features, especially in the groundwater remediation.
Therefore, in recent years, nano-iron be noticed more and more on the preparation of materials, process and characterization of the microstructure and properties, and made a lot of new progress.
Our work select wet chemical method to prepare zero-valent iron (ZVI) nanoparticles, study the influence on the product properties of the preparation process and the addition of different dispersants.
SEM characterization results.Nanoparticles themselves lack coordination atoms of near the surface, with a high activity, which makes the existence of nano-particles is different from the conventional role of particles in the spontaneous trend, it is easy to internal factors of aggregation of nanoparticles.
Because zero-valent iron (ZVI) nanoparticles have a magnetic, they are more likely to reunite in aqueous solution, which affect their application.
Therefore, in recent years, nano-iron be noticed more and more on the preparation of materials, process and characterization of the microstructure and properties, and made a lot of new progress.
Our work select wet chemical method to prepare zero-valent iron (ZVI) nanoparticles, study the influence on the product properties of the preparation process and the addition of different dispersants.
SEM characterization results.Nanoparticles themselves lack coordination atoms of near the surface, with a high activity, which makes the existence of nano-particles is different from the conventional role of particles in the spontaneous trend, it is easy to internal factors of aggregation of nanoparticles.
Because zero-valent iron (ZVI) nanoparticles have a magnetic, they are more likely to reunite in aqueous solution, which affect their application.
Effect of Heat Treatment Process on the Preparation of Foamed Glass Ceramic from Red Mud and Fly Ash
Online since: October 2014
Authors: Yi He Zhang, Pan Hu, Yu Xi Guo, Hong Wei Huang
Thus this paper examines the relationship between processing conditions and mechanical properties of foamed glass ceramics produced from mixtures of red mud and flay ash using CaCO3 as foaming agent.
Fig. 1 Evolution of apparent density and compressive strength with sintering temperature When the sintering temperature is kept constant at 840˚C, the holding time is then another important factor affecting the quality of the samples.
Fig. 2 Glass ceramic foams (840˚C) at different holding times: (A)5 min; (B)15 min; (C) 30 min; The physical properties of the foams obtained with different holding time at 840˚C are shown in Fig. 2.
Also, higher physical properties can be achieved by short holding time and fast heating rate.
Structure, Manufacturing, Properties and Applications, Wiley-VCH, Weinheim, Germany, 2005
Fig. 1 Evolution of apparent density and compressive strength with sintering temperature When the sintering temperature is kept constant at 840˚C, the holding time is then another important factor affecting the quality of the samples.
Fig. 2 Glass ceramic foams (840˚C) at different holding times: (A)5 min; (B)15 min; (C) 30 min; The physical properties of the foams obtained with different holding time at 840˚C are shown in Fig. 2.
Also, higher physical properties can be achieved by short holding time and fast heating rate.
Structure, Manufacturing, Properties and Applications, Wiley-VCH, Weinheim, Germany, 2005
Online since: February 2011
Authors: Hai Feng Zhao, Ming Liang Zhang, Wan Shan Wang, Li Da Zhu
Deformation and vibration will be emerged by support load and dynamic transmission process in Gear system of tunnel boring machine, which directly affect motion stability.
Material property is added to part.
The simulation is executed in Figure 2(b), which includes the information of the flexible body, such as mass, center of mass, moment of inertia, frequency, mode shapes and participation factors.
Angle velocity and angle acceleration of gears and forces between gears and shafts can get from simulation curves, which can improve mechanical dynamic property and key part and components design.
ADAMS Virtual prototype technology introduce and improvement[M],Beijing: Mechanical Industry Press
Material property is added to part.
The simulation is executed in Figure 2(b), which includes the information of the flexible body, such as mass, center of mass, moment of inertia, frequency, mode shapes and participation factors.
Angle velocity and angle acceleration of gears and forces between gears and shafts can get from simulation curves, which can improve mechanical dynamic property and key part and components design.
ADAMS Virtual prototype technology introduce and improvement[M],Beijing: Mechanical Industry Press
Online since: May 2023
Authors: Ilya Men, Dmitry Naroditsky
Controlling the heat input during welding to maintain the mechanical properties is of special importance for fine-grained high-strength steels [17].
FKM guidelines provide mean stress correction factors for welded joints [22].
Base and electrode metal properties are given below.
Material Specimen base metal (BM) and electrode material mechanical properties are given in Table 1.
Material properties BM and Electrode Mechanical properties Material Hardness, [HBW] Yield, [MPa] UTS, [MPa] Elongation 5d, [%] Base Metal MARS 600 600 1450 2150 10 Electrode ER307L 200 400 650 35 2.4.
FKM guidelines provide mean stress correction factors for welded joints [22].
Base and electrode metal properties are given below.
Material Specimen base metal (BM) and electrode material mechanical properties are given in Table 1.
Material properties BM and Electrode Mechanical properties Material Hardness, [HBW] Yield, [MPa] UTS, [MPa] Elongation 5d, [%] Base Metal MARS 600 600 1450 2150 10 Electrode ER307L 200 400 650 35 2.4.
Online since: December 2011
Authors: Xu Wang, Yu Xin Dong, Yong Jie Wang, Xiao Peng Xu, Si Chen, Yan Qin Shi, Jia Yuan Shen, Xiang Bin Xu
Introduction
Some defects such as low distortion temperature and brittleness of PA6 have limited its application, so many researchers tried to improve these properties [1].
Furthermore, the mechanical properties of PA6 based ternary composites are determined by many factors, such as: blend route, kinds and contents of elastomers, inorganic fillers type, surfactant categories and dosages, dispersion degree of additive component, et al [2-8].
Wang [10] and co-workers prepared wollastonite which coated with nano-aluminium silicate and applied it into PA6 as fillers, the results suggested that the mechanical properties and the heat distortion temperature of the PA6 composites filled by it were notably enhanced.
Mechanical measurement.
Table 1 The surface area of the three kinds of CaCO3 calculated by BET Name ground CaCO3 spherical CaCO3 needle-shaped CaCO3 Specific surface area [m2/g] 1.87 10.57 15.84 a b c Fig. 1 SEM micrograph of the CaCO3 particles: (a) ground CaCO3 (b) spherical CaCO3 (c) needle-shaped CaCO3 Fig. 2 Impact strength of PA6 based composites Mechanical Properties.
Furthermore, the mechanical properties of PA6 based ternary composites are determined by many factors, such as: blend route, kinds and contents of elastomers, inorganic fillers type, surfactant categories and dosages, dispersion degree of additive component, et al [2-8].
Wang [10] and co-workers prepared wollastonite which coated with nano-aluminium silicate and applied it into PA6 as fillers, the results suggested that the mechanical properties and the heat distortion temperature of the PA6 composites filled by it were notably enhanced.
Mechanical measurement.
Table 1 The surface area of the three kinds of CaCO3 calculated by BET Name ground CaCO3 spherical CaCO3 needle-shaped CaCO3 Specific surface area [m2/g] 1.87 10.57 15.84 a b c Fig. 1 SEM micrograph of the CaCO3 particles: (a) ground CaCO3 (b) spherical CaCO3 (c) needle-shaped CaCO3 Fig. 2 Impact strength of PA6 based composites Mechanical Properties.
Online since: May 2015
Authors: Giorgio Busca, Pedro Costa, Senentxu Lanceros-Mendéz, Annalisa Sironi, Ermelinda Falletta, Cristina Della Pina, Emanuele Zappa
Only the half-oxidized and half-protonated form, emeraldine salt (ES), exhibits electroconductive properties and for this reason it has received large attention.
PANI/CSA electromechanical properties were investigated by 4-point-bending tests in a Shimadzu-AG-IS 500 N testing instrument at a speed of 2.5 mm/min and a maximum vertical (z axis) displacement of 2.5 mm while simultaneously measuring the electrical resistivity variation with a digital multimeter Agilent 34401A.
Once dimers are produced, they react immediately leading to first oligomers and then polymers.If on the one hand the trans-azobenzene formation can affect the structure, purity and conductivity of PANI, on the other hand the benzidine production is risky for its toxic and carcinogenic properties [7], limiting the potential application of PANI produced by this way, in particular in the medical and biomedical sectors.
Low PANI crystallinity can be related to different factors: conditions of synthesis, kind and amount of acid used as the doping agent, molecular weight and random orientation of polymeric chains [17].
In this case, PANI works as a metal, whose change in resistance is mainly due to geometrical factors (see Eq. 1) [25].
PANI/CSA electromechanical properties were investigated by 4-point-bending tests in a Shimadzu-AG-IS 500 N testing instrument at a speed of 2.5 mm/min and a maximum vertical (z axis) displacement of 2.5 mm while simultaneously measuring the electrical resistivity variation with a digital multimeter Agilent 34401A.
Once dimers are produced, they react immediately leading to first oligomers and then polymers.If on the one hand the trans-azobenzene formation can affect the structure, purity and conductivity of PANI, on the other hand the benzidine production is risky for its toxic and carcinogenic properties [7], limiting the potential application of PANI produced by this way, in particular in the medical and biomedical sectors.
Low PANI crystallinity can be related to different factors: conditions of synthesis, kind and amount of acid used as the doping agent, molecular weight and random orientation of polymeric chains [17].
In this case, PANI works as a metal, whose change in resistance is mainly due to geometrical factors (see Eq. 1) [25].