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Online since: July 2011
Authors: Somnath Chattopadhyaya, Aniruddha Ghosh, S. Mukherjee
It is observed that a refine microstructure of the HAZ, imparts largely the intended properties of the welded joint [1].
A combined effect of chemical composition of flux and welding parameters on the mechanical properties of SAW process is shown to be of utmost significance [4-5].
Experimental Procedure The experiments were conducted as per the design matrix at random to avoid errors due to noise factors.
[5] Kanjilal,P., Pal,T.K., Majumdar,S.K., Combined Effect of Flux and welding Parameters on Chemical Composition and Mechanical Properties of submerged arc Weld Metal; J. of Materials Processing Technology V.171, N.2,2006
[6] Livieri,P., Lazzarin,P., “Fatigue strength of steel and aluminum welded joints based on generalized stress intensity factors and local strain energy values; Int.
A combined effect of chemical composition of flux and welding parameters on the mechanical properties of SAW process is shown to be of utmost significance [4-5].
Experimental Procedure The experiments were conducted as per the design matrix at random to avoid errors due to noise factors.
[5] Kanjilal,P., Pal,T.K., Majumdar,S.K., Combined Effect of Flux and welding Parameters on Chemical Composition and Mechanical Properties of submerged arc Weld Metal; J. of Materials Processing Technology V.171, N.2,2006
[6] Livieri,P., Lazzarin,P., “Fatigue strength of steel and aluminum welded joints based on generalized stress intensity factors and local strain energy values; Int.
Online since: May 2020
Authors: Chun Feng, Li Juan Zhu, Ya Cong Song, Hong Jiang Ge, Ya Qiong Cao
The influence of alloy elements, defects, environmental factors and mechanical factors on hydrogen sulfide corrosion resistance of steels for oil country tubular goods were discussed.
The influence of alloy elements, defects, environmental factors and mechanical factors on hydrogen sulfide corrosion resistance of steels for oil country tubular goods are discussed.
Pressure is an important factor affecting the diffusion rate and corrosion rate of hydrogen atoms in materials.
Corrosion properties of 3% Cr steels in oil and gas environments.
Corrosion properties of 3% Cr steels in oil and gas environments.
The influence of alloy elements, defects, environmental factors and mechanical factors on hydrogen sulfide corrosion resistance of steels for oil country tubular goods are discussed.
Pressure is an important factor affecting the diffusion rate and corrosion rate of hydrogen atoms in materials.
Corrosion properties of 3% Cr steels in oil and gas environments.
Corrosion properties of 3% Cr steels in oil and gas environments.
Online since: July 2014
Authors: Li Xin Sun, Hong Dong, Jing Fen Yang
But the code only provides a revise coefficient for few constructions under typical conditions, and does not provide which factors impact on the thermal conductivity and how much they affect.
Environment Dependence Test Thermal conductivity is a function of temperature, moisture content and mechanical factors.
The test is strictly based on《Thermal insulation - Determination of steady-state thermal resistance and related properties-Guarded hot plate apparatus》(GB/T10294-2008/iso 8302: 1991)and《Determination of stead-state thermal transmissivity of a moist building material》(GB/T17370-1998/idt iso10051: 1996)[2,3].
The thermal conductivity are not affected by the compressive creep.
[2] Thermal insulation - Determination of steady-state thermal resistance and related properties - Guarded hot plate apparatus, GB/T10294-2008/iso 8302: 1991 [3] Determination of stead-state thermal transmissivity of a moist building material, GB/T17370-1998/idt iso10051: 1996.
Environment Dependence Test Thermal conductivity is a function of temperature, moisture content and mechanical factors.
The test is strictly based on《Thermal insulation - Determination of steady-state thermal resistance and related properties-Guarded hot plate apparatus》(GB/T10294-2008/iso 8302: 1991)and《Determination of stead-state thermal transmissivity of a moist building material》(GB/T17370-1998/idt iso10051: 1996)[2,3].
The thermal conductivity are not affected by the compressive creep.
[2] Thermal insulation - Determination of steady-state thermal resistance and related properties - Guarded hot plate apparatus, GB/T10294-2008/iso 8302: 1991 [3] Determination of stead-state thermal transmissivity of a moist building material, GB/T17370-1998/idt iso10051: 1996.
Online since: March 2020
Authors: João M.P.Q. Delgado
Roberto Frias, s/n; 4200-465 Porto, Portugal
ajdelgado@fe.up.pt,
Keywords: Gypsum based walls; Mechanical properties; System performance tests.
To achieve the ideal conditions of hygrothermal comfort inside a building, it is necessary to have greater control of the factors that influence those conditions, both interior temperature and relative humidity, which are affected by climatic conditions and the use of the buildings, as well as the characteristics relating to the geometry, location and facade composition.
The main focus was the determination of mechanical properties and an assessment of the performance of walls built with hydro gypsum block included tests of water tightness, adhesion and impact.
Mechanical properties The mechanical properties results showed that the hydro samples with 0.3% of water repellent additive content present higher flexural strength values when compared with the samples with 0.1% water repellent additive, 1.9 MPa and 1.7 MPa, respectively.
Xue (2020), Study on the improvement of the waterproof and mechanical properties of hemihydrate phosphogypsum-based foam insulation materials.
To achieve the ideal conditions of hygrothermal comfort inside a building, it is necessary to have greater control of the factors that influence those conditions, both interior temperature and relative humidity, which are affected by climatic conditions and the use of the buildings, as well as the characteristics relating to the geometry, location and facade composition.
The main focus was the determination of mechanical properties and an assessment of the performance of walls built with hydro gypsum block included tests of water tightness, adhesion and impact.
Mechanical properties The mechanical properties results showed that the hydro samples with 0.3% of water repellent additive content present higher flexural strength values when compared with the samples with 0.1% water repellent additive, 1.9 MPa and 1.7 MPa, respectively.
Xue (2020), Study on the improvement of the waterproof and mechanical properties of hemihydrate phosphogypsum-based foam insulation materials.
Online since: February 2018
Authors: Yuan Jun Sun, J. Sun, Wei Cheng Cao, Geng An
The purity of target materials greatly affects the properties of sputtered thin films and the higher the purity of target materials, the better the properties of sputtered thin films are.
In this research, the preparation process for Mo target was explored and then magnetron sputtering test was conducted in vacuum environment by using the prepared Mo target.The factors affected the microstructure and properties of Mo target and Mo thin films were analyzed and studied.
Influence Factors of Mo Thin Film Preparation.
Table 6 Electrical properties of Mo thin films with different sputtering currents.
Sun, Mechanical properties of molybdenum products prepared by using molybdenum powders with different micro-morphologies, Rare.
In this research, the preparation process for Mo target was explored and then magnetron sputtering test was conducted in vacuum environment by using the prepared Mo target.The factors affected the microstructure and properties of Mo target and Mo thin films were analyzed and studied.
Influence Factors of Mo Thin Film Preparation.
Table 6 Electrical properties of Mo thin films with different sputtering currents.
Sun, Mechanical properties of molybdenum products prepared by using molybdenum powders with different micro-morphologies, Rare.
Online since: May 2006
Authors: Jacinta Garcia Talegon, Vicente Rives
The knowledge of the decay processes, as well as
mechanisms governing these processes, and the real effect of factors depending on the intrinsic
properties of the material to be studied, and external agents of decay, will allow a rationale use of
these materials and to anticipate their behaviour beforehand, in order to success in restoration.
We then need to understand the factors of decay.
Stone materials decay Alteration processes of building stone materials depends, on one hand, of intrinsic factors on the material itself (Table 1) like the composition and internal architecture (texture and structure), on the other hand, of extrinsic factors (Table 1) like the environmental conditions (climatic and pollution) where the monument is located, and even the microclimate affecting a particular stone in the building [5-7].
Protection, one of the properties that have been most sought in surface coatings is water repellence.
Inorganic products are consolidants; they show chemical, physical and structural affinity to stone, weak improvement of mechanical properties and low penetration ability, and they are fragile and non elastic.
We then need to understand the factors of decay.
Stone materials decay Alteration processes of building stone materials depends, on one hand, of intrinsic factors on the material itself (Table 1) like the composition and internal architecture (texture and structure), on the other hand, of extrinsic factors (Table 1) like the environmental conditions (climatic and pollution) where the monument is located, and even the microclimate affecting a particular stone in the building [5-7].
Protection, one of the properties that have been most sought in surface coatings is water repellence.
Inorganic products are consolidants; they show chemical, physical and structural affinity to stone, weak improvement of mechanical properties and low penetration ability, and they are fragile and non elastic.
Online since: January 2013
Authors: Marián Flimel
Measurements are performed with optimal conditions (without the internal effects of environment) and the other hand with real conditions, when factors such as noise or artificial light affect on the construction of the glazing.
Introduction The purpose of this article is to determine the influence of selected physical factors of internal environment (sound and artificial lighting) on the value of heat transfer coefficient of glazing.
physical properties of glass, - type of filling with inert gases between glazing and the width of the gap, - type of distant profiles of glazing (warm frame), · operating conditions: maintenance, cleanness of glazing, mechanical damage, shielding elements, · environmental conditions – the influence of different energy sources that influence the heat flows density of glazing, for example, radiant heat and light sources, the noise in the interior, etc.
The individual factors affect the added value of heat flow density through the construction of glazing depending on the intensity of the flow transforming on the heat, flow characteristics (spectrum composition), the distance from the source of agents from construction, location of sources in space and their directional characteristics, duration of effect from heat flows interactions with construction of glazing.
The summation of individual heat flows was not demonstrated by experiments in the interaction of several factors (noise and artificial lighting).
Introduction The purpose of this article is to determine the influence of selected physical factors of internal environment (sound and artificial lighting) on the value of heat transfer coefficient of glazing.
physical properties of glass, - type of filling with inert gases between glazing and the width of the gap, - type of distant profiles of glazing (warm frame), · operating conditions: maintenance, cleanness of glazing, mechanical damage, shielding elements, · environmental conditions – the influence of different energy sources that influence the heat flows density of glazing, for example, radiant heat and light sources, the noise in the interior, etc.
The individual factors affect the added value of heat flow density through the construction of glazing depending on the intensity of the flow transforming on the heat, flow characteristics (spectrum composition), the distance from the source of agents from construction, location of sources in space and their directional characteristics, duration of effect from heat flows interactions with construction of glazing.
The summation of individual heat flows was not demonstrated by experiments in the interaction of several factors (noise and artificial lighting).
Online since: February 2012
Authors: Er Wei Su
This essay introduces the PHC pile of vertical bearing capacity, level of capacity, capacity and final pressure values, tensile properties, pile the stress mechanism, and the factors that influence bearing capacity, then the useful suggestions of how to design and construct are given.
Currently there are two types of commonly used formula: First, the physical and mechanical properties of soil and a large number of test piles is based on information established by statistical analysis and pile tip resistance and the relationship between indicators of soil types; the other is soil mechanical properties, such as the Land of the standard penetration blow count based.
Also, care should: (1) when the final pressure should be based on the number of consecutive re-pressing the pile length and geological conditions and other factors to determine, generally not more than three times.
Affect the Pile Bearing Capacity Factors deflection.
Conclusion This paper summarizes the characteristics and bearing capacity of pipe stress analysis, the factors affecting pile bearing capacity and to improve the bearing capacity of pile method.
Currently there are two types of commonly used formula: First, the physical and mechanical properties of soil and a large number of test piles is based on information established by statistical analysis and pile tip resistance and the relationship between indicators of soil types; the other is soil mechanical properties, such as the Land of the standard penetration blow count based.
Also, care should: (1) when the final pressure should be based on the number of consecutive re-pressing the pile length and geological conditions and other factors to determine, generally not more than three times.
Affect the Pile Bearing Capacity Factors deflection.
Conclusion This paper summarizes the characteristics and bearing capacity of pipe stress analysis, the factors affecting pile bearing capacity and to improve the bearing capacity of pile method.
Online since: April 2004
Authors: Ai Kah Soh, Xiu Xi Wang, Z.H. Sun, Heng An Wu
China
Keywords: Molecular dynamics simulation, Metal nanowire, Mechanical property, Strength,
Fracture, Size effect, Strain rate
ABSTRACT
Numerical simulations have been carried out to determine the mechanical property of single
crystal copper nanowire subjected to tension using the molecular dynamics method.
However, when the strain rate is sufficiently high, amorphization is a dominant factor of plastic deformation and super-plasticity is found.
With molecular dynamics techniques, many atomistic simulations on mechanical behaviors of metal nanowire, such as structure and stability [3-4], deformation and fracture [5-11], elastic properties [12-14] have been performed in the recent past.
It is worth noting that in the case of experimental study, the results can be affected by a number of factors simultaneously, Whereas, in the case of molecular dynamics simulation, the direct effects of strains due to heat dissipation and the concomitant temperature increase at various strain rates can be isolated by controlling the temperature (keeping the temperature constant) and the strain rate.
The high strain rate does not only affect the yield stress of nanowire, but also the deformation mechanism after yielding.
However, when the strain rate is sufficiently high, amorphization is a dominant factor of plastic deformation and super-plasticity is found.
With molecular dynamics techniques, many atomistic simulations on mechanical behaviors of metal nanowire, such as structure and stability [3-4], deformation and fracture [5-11], elastic properties [12-14] have been performed in the recent past.
It is worth noting that in the case of experimental study, the results can be affected by a number of factors simultaneously, Whereas, in the case of molecular dynamics simulation, the direct effects of strains due to heat dissipation and the concomitant temperature increase at various strain rates can be isolated by controlling the temperature (keeping the temperature constant) and the strain rate.
The high strain rate does not only affect the yield stress of nanowire, but also the deformation mechanism after yielding.
Online since: March 2017
Authors: Alan Vaško, Juraj Belan, Mária Chalupová, Eva Tillová, Ivana Švecová, Lenka Kuchariková
Thus alloying is an effective method to improve the mechanical properties of Al-Si alloys.
Therefore, for a given composition, it is the ability to optimize structural factors.
A number of factors define the metallurgical structure in Al-Si castings and that determines the properties.
Dobrzański, et al., Microstructure and mechanical properties of AC AlSi9CuX alloys.
Boonjubut, et al., Study of factors affecting artificial aging of 6061 aluminium alloy by factorial design, Review of Integrative Business and Economics Research 3 (NRRU) (2011)
Therefore, for a given composition, it is the ability to optimize structural factors.
A number of factors define the metallurgical structure in Al-Si castings and that determines the properties.
Dobrzański, et al., Microstructure and mechanical properties of AC AlSi9CuX alloys.
Boonjubut, et al., Study of factors affecting artificial aging of 6061 aluminium alloy by factorial design, Review of Integrative Business and Economics Research 3 (NRRU) (2011)