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Online since: March 2010
Authors: Yi Wang Bao, Yan Qiu, Xiu Fang Wang, Kun Ming Li, Xiao Gen Liu
In elastic contact issues, the reduced
modulus(Er) as expressed by Eq. (3) is commonly used to analyze the material properties in
indentation tests:
.
111
2
2
i i
r EEE
νν −
+
−
= (3)
where E and υ are the elastic modulus and Poi- sson's ratio of the sample, and Ei and υi are those of the
indenter, which are known.
When λ is fixed, it is easy to determine other mechanical properties of the material.
The result is affected by characteristic of the load and accuracy of measurement.
While elastic properties of an object have a regular relationship with its density, thus, when inherent resonance frequency of the sample is obtained, its elastic properties can be calculated accurately.
(2) Results of dynamic method have excellent stability, while results of Vickers indentation technique show relatively greater scatter and measure the local properties
When λ is fixed, it is easy to determine other mechanical properties of the material.
The result is affected by characteristic of the load and accuracy of measurement.
While elastic properties of an object have a regular relationship with its density, thus, when inherent resonance frequency of the sample is obtained, its elastic properties can be calculated accurately.
(2) Results of dynamic method have excellent stability, while results of Vickers indentation technique show relatively greater scatter and measure the local properties
Online since: May 2011
Authors: Hong Mei Yang
To the steel structure of often or possible lower temperature work, especially welding structure, the steel of good chemical composition and mechanical properties should chosen
But semi-rigid node application is less, its mechanical characteristics is mainly more complex, often through experiments more accurate design data can be obtain
In steel structure framework - core tube structure system, the toilet and kitchen is put inside core tube that has a good waterproof property.
Firstly, it is the environment factors, steel structure long-term is exposed on relative larger humidity environment, which can produce corrosion phenomena, and acid, salt chemical material in environment also can fast make corrode steel structure.
The corrosion rusty of steel structure makes strength and bearing capacity reduce, make the service life of steel structure reduce, once due to corrosion of steel structure which causes the deformation and fracture and collapse, irreparable damage will cause, and steel structure corrosion affect the beauty of building.
But semi-rigid node application is less, its mechanical characteristics is mainly more complex, often through experiments more accurate design data can be obtain
In steel structure framework - core tube structure system, the toilet and kitchen is put inside core tube that has a good waterproof property.
Firstly, it is the environment factors, steel structure long-term is exposed on relative larger humidity environment, which can produce corrosion phenomena, and acid, salt chemical material in environment also can fast make corrode steel structure.
The corrosion rusty of steel structure makes strength and bearing capacity reduce, make the service life of steel structure reduce, once due to corrosion of steel structure which causes the deformation and fracture and collapse, irreparable damage will cause, and steel structure corrosion affect the beauty of building.
Online since: May 2007
Authors: Li Feng Zhang, Tiphaine Dupont
It has a good machinability and weldability
combined to excellent mechanical properties (creep resistance, strength).
Sufficient time and suitable temperature (705°C) are the key factors.
Three main factors influence the formation of the intermetallic compounds: the electronegativity, ionization potential and ionic radii of the interacting components.
The metal recovery depends on two factors : Distilling time: the magnesium recovery increases as the distilling time increases, but there is almost no change as the time is 12 min or higher.
It has a good machinability and weldability combined to excellent mechanical properties (creep resistance, strength).
Sufficient time and suitable temperature (705°C) are the key factors.
Three main factors influence the formation of the intermetallic compounds: the electronegativity, ionization potential and ionic radii of the interacting components.
The metal recovery depends on two factors : Distilling time: the magnesium recovery increases as the distilling time increases, but there is almost no change as the time is 12 min or higher.
It has a good machinability and weldability combined to excellent mechanical properties (creep resistance, strength).
Online since: March 2004
Authors: Ming Zhou, Ai Xin Feng, H.K. Xie, Y.S. Liu, Yong Kang Zhang, Lan Cai
The interfacial adhesion between thin film and substrate are often the predominant factor in
determining the performance and reliability of thin film-substrate system.
Thin film is one of the important means applied to improve surface performance of material, which gives the parts the property such as high wear-resistance, high corrosion-resistance, high heat-resistance, high fatigue-resistance and so on.
This has affected the further development of thin film science, and the contradiction becomes bigger day by day.
But it has some disadvantages, such as complication of factors influencing critical load, complication of mechanisms of measuring instrument, great influence of elastic or plastic deformation of film and substrate on the result measured, limitation of application, etc.[2-4].
Conclusions A new method of laser scratch testing technique that synthesizes the advantages of traditional scratching technique and laser measure technique is introduced to characterize interfacial adhesion between thin film and substrate, with the advantages of non-contact measurement, simplification of Journal Title and Volume Number (to be inserted by the publisher) 619 the factors influencing of the result measured, little influence of substrate and so on.
Thin film is one of the important means applied to improve surface performance of material, which gives the parts the property such as high wear-resistance, high corrosion-resistance, high heat-resistance, high fatigue-resistance and so on.
This has affected the further development of thin film science, and the contradiction becomes bigger day by day.
But it has some disadvantages, such as complication of factors influencing critical load, complication of mechanisms of measuring instrument, great influence of elastic or plastic deformation of film and substrate on the result measured, limitation of application, etc.[2-4].
Conclusions A new method of laser scratch testing technique that synthesizes the advantages of traditional scratching technique and laser measure technique is introduced to characterize interfacial adhesion between thin film and substrate, with the advantages of non-contact measurement, simplification of Journal Title and Volume Number (to be inserted by the publisher) 619 the factors influencing of the result measured, little influence of substrate and so on.
Online since: April 2013
Authors: Mahidzal Dahari, H.Y. Chong, Hwa Jen Yap, Y.T. Loong
Just like normal refueling stations, hydrogen stations and its infrastructure must be planned, designed, and operated in accordance with the properties.
Just like normal refueling stations, hydrogen stations and its infrastructure must be planned, designed, and operated in accordance with their properties.
Safety considerations and guidelines as well as some special equipment are necessary due to the unique properties of hydrogen.
The safety of the hydrogen production and storage installation and its application can consider as one of the major issues affecting the acceptance of hydrogen for public use [28].
Issues affecting the acceptance of hydrogen fuel.
Just like normal refueling stations, hydrogen stations and its infrastructure must be planned, designed, and operated in accordance with their properties.
Safety considerations and guidelines as well as some special equipment are necessary due to the unique properties of hydrogen.
The safety of the hydrogen production and storage installation and its application can consider as one of the major issues affecting the acceptance of hydrogen for public use [28].
Issues affecting the acceptance of hydrogen fuel.
Online since: July 2022
Authors: Laurent Chaunier, Sofiane Belhabib, Sofiane Guessasma, Anne-Laure Reguerre, Eric Leroy
Bonding properties are at the root of the printability of a considered thermoplastic polymer and have an impact on the quality of the final object, as well as its end-use properties.
Furthermore, the characteristic time for viscous sintering can be computed by the use of the Hopper’s abacus to check the various settings of the 2D FEM model, as material’s properties (e.g. viscosity and surface tension), processing parameters (e.g. temperature) and mesh size.
The amorphous extruded material, namely “Z20Gly”, presents a glass transition temperature at Tg = 42°C, associated to a main mechanical relaxation at Tα ≈ 50°C, with material flowing above 80°C [6].
Conclusion The image analysis procedure with lemniscates fitting is efficient to characterize both filaments’ shape and size factors during hot melt sintering sequences from experimental trials and numerically simulated by 2D FEM model combined with the Level Set method.
This phenomenon affects the characterization of the fusion-bonding abilities, as well as its modelling.
Furthermore, the characteristic time for viscous sintering can be computed by the use of the Hopper’s abacus to check the various settings of the 2D FEM model, as material’s properties (e.g. viscosity and surface tension), processing parameters (e.g. temperature) and mesh size.
The amorphous extruded material, namely “Z20Gly”, presents a glass transition temperature at Tg = 42°C, associated to a main mechanical relaxation at Tα ≈ 50°C, with material flowing above 80°C [6].
Conclusion The image analysis procedure with lemniscates fitting is efficient to characterize both filaments’ shape and size factors during hot melt sintering sequences from experimental trials and numerically simulated by 2D FEM model combined with the Level Set method.
This phenomenon affects the characterization of the fusion-bonding abilities, as well as its modelling.
Online since: September 2013
Authors: Tammana Jayakumar, Shaju K. Albert, A.K. Bhaduri, U. Kamachi Mudali, M.D. Mathew
For different heats of 316LN SS containing 0.07-0.22 wt% nitrogen, the tensile and creep properties increased with increase in nitrogen content, while low cycle fatigue properties peaked at 0.14 wt% nitrogen.
As the design life of future SFRs is envisaged to be enhanced to 60 years, from the present 40 years, 316LN SS with improved high-temperature mechanical properties is required.
These developmental efforts, involving evaluation of mechanical properties and weldability, were aimed at optimisation of the enhanced nitrogen content in 316LN to ensure property enhancement to meet the design requirements as also characterisation of the corrosion behaviour and development of welding consumables for the welding of optimised composition enhanced nitrogen 316LN SS.
Experimental In order to understand the effect of nitrogen on the mechanical properties, corrosion behavior and weldability of 316LN SS, a large experimental programme was carried out leading to optimization of the nitrogen content.
Based on the LCF properties, 0.14 wt% nitrogen is found to be the optimum nitrogen content for the nitrogen-enhanced 316LN SS.
As the design life of future SFRs is envisaged to be enhanced to 60 years, from the present 40 years, 316LN SS with improved high-temperature mechanical properties is required.
These developmental efforts, involving evaluation of mechanical properties and weldability, were aimed at optimisation of the enhanced nitrogen content in 316LN to ensure property enhancement to meet the design requirements as also characterisation of the corrosion behaviour and development of welding consumables for the welding of optimised composition enhanced nitrogen 316LN SS.
Experimental In order to understand the effect of nitrogen on the mechanical properties, corrosion behavior and weldability of 316LN SS, a large experimental programme was carried out leading to optimization of the nitrogen content.
Based on the LCF properties, 0.14 wt% nitrogen is found to be the optimum nitrogen content for the nitrogen-enhanced 316LN SS.
Online since: January 2013
Authors: Lin Xiu Zhao, Si Guo Yuan, Jiao Sha, Shao Bin Li
The specific goal for the work reported here is to examine the effect of the pore structure of the polymeric adsorbents on adsorptive properties toward MB.
The polarity and pore size distribution of polymer adsorbents are also the important factors affecting adsorption.
If the pore diameter is too small, diffusion of adsorbate from the aqueous phase to the pores of the adsorbent will be hindered, thus affects the adsorption in a negative way.
Sheldon, Coagulation and precipitation of a mechanical pulping effluent-I.
Eiji, et al., Preparation of activated fibrous carbon from phenolic fabric and its molecular sieving properties.
The polarity and pore size distribution of polymer adsorbents are also the important factors affecting adsorption.
If the pore diameter is too small, diffusion of adsorbate from the aqueous phase to the pores of the adsorbent will be hindered, thus affects the adsorption in a negative way.
Sheldon, Coagulation and precipitation of a mechanical pulping effluent-I.
Eiji, et al., Preparation of activated fibrous carbon from phenolic fabric and its molecular sieving properties.
Online since: June 2019
Authors: Yong Dong He, Liu Yu, Yu Feng Du
X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, differential scanning calorimetry, and thermogravimetric analysis were used to study the microstructure and properties of an Al-Ti-C parent alloy prepared using the villiaumite–woodchip method.
The third stage involved titanium aluminum, carbon aluminum, and titanium carbon compounds constitute the Al-Ti-C parent alloy with a refined effect water and carbon dioxide, which were the cracking products of the woodchips, reacted with aluminum to produce alumina and hydrogen, which accumulated in the grain boundary in the form of slag-gas pockets. 1.Introduction The refined grains in an aluminum alloy can restrict the growth of columnar crystals, and thus refining the grain size can improve the mechanical properties in ingots [1-4].
This activity, combined with other factors, causes graphite and other carbon sources to affect the quality and refining effect of the Al-Ti-C intermediate alloy [17-18].
[2] E Wang, T Gao, J Nie, X Liu, Grain refinement limit and mechanical properties of 6063 alloy inoculated by Al–Ti–C (B) master alloys[J].
Effect of Sc addition on the microstructure and wear properties of A356 alloy and A356–TiB 2 in situ composite[J].
The third stage involved titanium aluminum, carbon aluminum, and titanium carbon compounds constitute the Al-Ti-C parent alloy with a refined effect water and carbon dioxide, which were the cracking products of the woodchips, reacted with aluminum to produce alumina and hydrogen, which accumulated in the grain boundary in the form of slag-gas pockets. 1.Introduction The refined grains in an aluminum alloy can restrict the growth of columnar crystals, and thus refining the grain size can improve the mechanical properties in ingots [1-4].
This activity, combined with other factors, causes graphite and other carbon sources to affect the quality and refining effect of the Al-Ti-C intermediate alloy [17-18].
[2] E Wang, T Gao, J Nie, X Liu, Grain refinement limit and mechanical properties of 6063 alloy inoculated by Al–Ti–C (B) master alloys[J].
Effect of Sc addition on the microstructure and wear properties of A356 alloy and A356–TiB 2 in situ composite[J].
Online since: November 2015
Authors: Michael Raupach, Robert Schulte Holthausen
• Permeation and its influence on mechanical properties of water and a solution of water and 10 % sulfuric acid by immersion of cubes with an edge length of 40 mm.
Results of overall performance An overall outline of the SPC’s properties is given in Table 1.
Mechanically, the SPC shows very good properties.
Results for diffusion properties and durability Among the economic and fast application of the SPC, its durability and its impermeability in moist and acidic environments are properties of major importance.
The wide range of tests done on the material show its good mechanical properties its technical impermeability and durability in moist and acidic environments.
Results of overall performance An overall outline of the SPC’s properties is given in Table 1.
Mechanically, the SPC shows very good properties.
Results for diffusion properties and durability Among the economic and fast application of the SPC, its durability and its impermeability in moist and acidic environments are properties of major importance.
The wide range of tests done on the material show its good mechanical properties its technical impermeability and durability in moist and acidic environments.