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Online since: July 2021
Authors: Rakesh Goyal, Khushdeep Goyal, Prince Puri, Bal Krishan
"Experimental investigations of mechanical properties and slurry erosion behaviour of high velocity oxy fuel and plasma sprayed Cr2O3–50% Al2O3 coatings on CA6NM turbine steel under hydro accelerated conditions."
"Mechanical and microstructural properties of carbon nanotubes reinforced chromium oxide coated boiler steel."
"Experimental investigation on erosion performance and wear factors of custom 450 steel as the first row blade material of an axial compressor."
"Properties of HVOF-sprayed Stellite-6 coatings."
"Microstructure and properties of Al2O3-ZrO2 composite coatings prepared by air plasma spraying."
"Mechanical and microstructural properties of carbon nanotubes reinforced chromium oxide coated boiler steel."
"Experimental investigation on erosion performance and wear factors of custom 450 steel as the first row blade material of an axial compressor."
"Properties of HVOF-sprayed Stellite-6 coatings."
"Microstructure and properties of Al2O3-ZrO2 composite coatings prepared by air plasma spraying."
Online since: September 2013
Authors: Yu Gao, Xiang Zhong Feng
In the past software development activities, these issues have seriously troubled people, these issues affect the results of software development.
As we all know, RUP method have property of "cropping"[10], after cropping, RUP method meeting specific requirements can be obtained.
To put forward property of "cropping" is an innovative, such, flexibility of RUP method enhanced.
The first point is to consider the external factors of software development method.
The second point is to consider inside factors of software development method.
As we all know, RUP method have property of "cropping"[10], after cropping, RUP method meeting specific requirements can be obtained.
To put forward property of "cropping" is an innovative, such, flexibility of RUP method enhanced.
The first point is to consider the external factors of software development method.
The second point is to consider inside factors of software development method.
Online since: August 2011
Authors: Chang Le Chen, Xiao Li Wen, Zhao Chen
Introduction
It is well known that the alloy composition and processing conditions can determine the microstructure and mechanical properties of alloys to a great extent.
In the solidification process, growth velocity, temperature gradient and heat transfer condition at the solid-liquid interface are important parameters that affect the microstructure of alloy [1].
According to Turnbull’s nucleation theory [16], the nucleation rate ( I ) of homogeneous nucleation is expressed as follows (2) Where, is a constant ( ), is nucleus shape factor, is melting point of metal, and is latent heat.
According to the classical nucleation theory [19], the nucleation rate is expressed as follows (7) where, is a constant, and is the melting entropy, and is the undercooling, is the solid-liquid interface energy, and is the wetting angle,is the wetting angle factor, is atom diffusion activation energy, and is Boltzmann constant.
There are two main factors that favor the heterogeneous nuclei: (1) the primary phases are acted by not only the viscous drag force caused by the fluid flow but also the electromagnetic force by the RMF.
In the solidification process, growth velocity, temperature gradient and heat transfer condition at the solid-liquid interface are important parameters that affect the microstructure of alloy [1].
According to Turnbull’s nucleation theory [16], the nucleation rate ( I ) of homogeneous nucleation is expressed as follows (2) Where, is a constant ( ), is nucleus shape factor, is melting point of metal, and is latent heat.
According to the classical nucleation theory [19], the nucleation rate is expressed as follows (7) where, is a constant, and is the melting entropy, and is the undercooling, is the solid-liquid interface energy, and is the wetting angle,is the wetting angle factor, is atom diffusion activation energy, and is Boltzmann constant.
There are two main factors that favor the heterogeneous nuclei: (1) the primary phases are acted by not only the viscous drag force caused by the fluid flow but also the electromagnetic force by the RMF.
Online since: November 2014
Authors: Yan Chao Chen, Jiao Fan, Feng Dai, Xiao Dan Guo
In summer, the rate is higher, but in winter, the accumulation of the emissions is serious, and even affects the power plant and the normal operation of the heating boiler.
So the lack of talents is becoming one of the restraining factors of Tongzhou’s further development.
Development Strategy In order to take advantage of the advantage, overcome the influence of various unfavorable factors, and look for more opportunities, this paper puts forward the strategy for Tongzhou Company, based on the SWOT analyses about the company Strength, Weakness, opportunities, threats and so.
[3] Siddique R, Effect of Fine Aggregate Replacement with Class F Fly Ash on the Mechanical Properties of Concrete, J.
So the lack of talents is becoming one of the restraining factors of Tongzhou’s further development.
Development Strategy In order to take advantage of the advantage, overcome the influence of various unfavorable factors, and look for more opportunities, this paper puts forward the strategy for Tongzhou Company, based on the SWOT analyses about the company Strength, Weakness, opportunities, threats and so.
[3] Siddique R, Effect of Fine Aggregate Replacement with Class F Fly Ash on the Mechanical Properties of Concrete, J.
Online since: July 2015
Authors: Swetha Madhusudanan, Lilly Rose Amirtham
The properties of the alternative building wall materials are identified and compared with that of conventional bricks.
Energy is said to be one of the prime factors for the economic development of the country.
It also causes environmental hazards as considerable amount of top soil is consumed which is rich in minerals, thus affecting the natural vegetation.
The use of phosphogypsum increased the unit weight and mechanical strength while lowering the value of water absorption.
The materials were properly weathered and their properties were studied with the help of literature reviews (Annexure-I).
Energy is said to be one of the prime factors for the economic development of the country.
It also causes environmental hazards as considerable amount of top soil is consumed which is rich in minerals, thus affecting the natural vegetation.
The use of phosphogypsum increased the unit weight and mechanical strength while lowering the value of water absorption.
The materials were properly weathered and their properties were studied with the help of literature reviews (Annexure-I).
Online since: September 2019
Authors: Anatoly P. Surzhikov, Andrey V. Malyshev, Anna B. Petrova, Elena A. Sheveleva
Consequently, magnetic and dielectric properties of such ferrites can worsen [1].
The radiation-thermal (RT) method combines the simultaneous influence of thermal and radiation factors.
Childress, Effects of lithium and oxygen losses on magnetic and crystallographic properties of spinel lithium ferrite, J.
Wang, Effect of multiwalled carbon nanotubes on the thermoelectric properties of Mn-Zn ferrites, Solid State Sciences 72 (2017) 130-133
Gorelik, Effect of low-melting additives on the formation of the microstructure and the properties of ferrites with a rectangular hysteresis loop, Izv Akad Nauk Neorg.
The radiation-thermal (RT) method combines the simultaneous influence of thermal and radiation factors.
Childress, Effects of lithium and oxygen losses on magnetic and crystallographic properties of spinel lithium ferrite, J.
Wang, Effect of multiwalled carbon nanotubes on the thermoelectric properties of Mn-Zn ferrites, Solid State Sciences 72 (2017) 130-133
Gorelik, Effect of low-melting additives on the formation of the microstructure and the properties of ferrites with a rectangular hysteresis loop, Izv Akad Nauk Neorg.
Online since: October 2011
Authors: Jin Xiao
Main Factors Affecting the Deformation of Dangerous Rock.(1) The deformation destruction of dangerous rock is closely related to and characteristics of the development of cracks in the area.
Factors Causing Instability of Dangerous Rock.Factors causing instability of dangerous rock include storms, earthquakes, and the split of plant roots.
Storm is the main factor causing dangerous rock collapse.
The surface water formed in precipitation infiltrate through cracks in the top of the cliffs, fill in the cracks, thus reducing the mechanical properties of cracks and increasing the water pressure inside the cracks (including the hydrodynamic pressure and pore water pressure), while softening the base to induce collapse of dangerous rock.
Factors Causing Instability of Dangerous Rock.Factors causing instability of dangerous rock include storms, earthquakes, and the split of plant roots.
Storm is the main factor causing dangerous rock collapse.
The surface water formed in precipitation infiltrate through cracks in the top of the cliffs, fill in the cracks, thus reducing the mechanical properties of cracks and increasing the water pressure inside the cracks (including the hydrodynamic pressure and pore water pressure), while softening the base to induce collapse of dangerous rock.
Online since: March 2007
Authors: Liudmila M. Kaputkina, A.G. Svjażin, J. Siwka, W.G. Prokoszkina, Bartosz Koczurkiewicz, Marcin Knapiński
Investigation into the effect of carbon and nitrogen contents of steels with an addition of
chromium, nickel and manganese on their structure and properties after thermoplastic treatment has
been carried out within the present study.
The structure and properties of such steels are determined by quenching and tempering cycles.
Introduction Increasing the share of alloying constituents in steel by the addition of carbon and nitrogen allows the range of modifying the chemical composition of nitrogen steels to be widened, wherever their application is desirable and will not adversely affect the capabilities of smelting and casting [1-3].
The purpose of this study was to examine the effect of nitrogen and carbon and the sum of these constituents on the formation of the structure and properties of different steel grades containing either equilibrium or over-equilibrium amounts of nitrogen.
This gives a basis for supposing that such steels will be characterized by better mechanical properties, as well as thermal stability after hardening and tempering, since silicon increases the resistance to tempering.
The structure and properties of such steels are determined by quenching and tempering cycles.
Introduction Increasing the share of alloying constituents in steel by the addition of carbon and nitrogen allows the range of modifying the chemical composition of nitrogen steels to be widened, wherever their application is desirable and will not adversely affect the capabilities of smelting and casting [1-3].
The purpose of this study was to examine the effect of nitrogen and carbon and the sum of these constituents on the formation of the structure and properties of different steel grades containing either equilibrium or over-equilibrium amounts of nitrogen.
This gives a basis for supposing that such steels will be characterized by better mechanical properties, as well as thermal stability after hardening and tempering, since silicon increases the resistance to tempering.
Online since: January 2012
Authors: Shiro Torizuka, S.V.S. Narayana Murty, Eijiro Muramastu
Low-carbon ultrafine-grained steel has excellent cold headability and favorable rolling properties, i.e., excellent formability.
However, for practical applications of these ultrafine grained steels, it is essential to evaluate their mechanical properties and understand the microstructure-mechanical property correlation in detail.
Reduction in area is affected by second phases and inclusions.
(1)Uniform elongation (2)Non - uniform elongation (%) 100 0 0 x S S S RA - = Nominal Strain (3)Reduction in area Fig.1 Three factors regarding formability.
Rolling property All types of steel exhibited favorable rolling properties; no problems were encountered.
However, for practical applications of these ultrafine grained steels, it is essential to evaluate their mechanical properties and understand the microstructure-mechanical property correlation in detail.
Reduction in area is affected by second phases and inclusions.
(1)Uniform elongation (2)Non - uniform elongation (%) 100 0 0 x S S S RA - = Nominal Strain (3)Reduction in area Fig.1 Three factors regarding formability.
Rolling property All types of steel exhibited favorable rolling properties; no problems were encountered.
Online since: November 2012
Authors: Hui Wang, Zeng Ying Sun, Yuan Jie Zhao, Jia Zeng, Jing Zhang
Finally complete the mechanical composition analysis and the structural analysis of the sediments [11]
Compared with other isotopes which make up the tree tissues, cellulose has stable chemical properties and low migration characteristics [14].
It is noteworthy that before determining the value of δD, the α-cellulose should be prepared through nitration because exchangeable hydrogen in the α-cellulose's O-H structure can affect on the result of climate reconstruction [17].
When analyzing hydrogen and oxygen isotopes time series, moving average method is used to eliminate parts of the random factors exist in the measured values, and improve the analyzability of the data [20].
However, there are still some differences in the specific division of various stages and the influential factors still need to be analyzed further.
Compared with other isotopes which make up the tree tissues, cellulose has stable chemical properties and low migration characteristics [14].
It is noteworthy that before determining the value of δD, the α-cellulose should be prepared through nitration because exchangeable hydrogen in the α-cellulose's O-H structure can affect on the result of climate reconstruction [17].
When analyzing hydrogen and oxygen isotopes time series, moving average method is used to eliminate parts of the random factors exist in the measured values, and improve the analyzability of the data [20].
However, there are still some differences in the specific division of various stages and the influential factors still need to be analyzed further.