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Online since: October 2010
Authors: Ri Sheng Du, Xian Wen Liang, Jun Tian, Ji Hua Peng
China
a
durisheng851018@163.com , bjhpeng@scut.edu.cn
Keywords: TiN/TiAlN coating, Current density, SKH51 steel, Microstructure, Mechanical properties
Abstract.
During deposition, the effect of target current on microstructure and mechanical properties is responsible for the number, energy of emission target particles and distribution of target droplets.
In this paper, Ti-Al-N coating on SKH51 was deposited by multi-arc ion plating and the effect of target current (density) on coating's mechanical properties and surface morphology was investigated.
In this study, the adhesion force is controlled by above two factors at the same time.
In order to get a optimal TiAlN coating on SKH51 steel, it is necessary to make further study on the effect of other factors.
During deposition, the effect of target current on microstructure and mechanical properties is responsible for the number, energy of emission target particles and distribution of target droplets.
In this paper, Ti-Al-N coating on SKH51 was deposited by multi-arc ion plating and the effect of target current (density) on coating's mechanical properties and surface morphology was investigated.
In this study, the adhesion force is controlled by above two factors at the same time.
In order to get a optimal TiAlN coating on SKH51 steel, it is necessary to make further study on the effect of other factors.
Online since: December 2009
Authors: Arturo Domínguez-Rodríguez, A. Morales-Rodríguez, Angela Gallardo-López, J.M. Córdoba, M.A. Avilés, F.J. Gotor
High Temperature Mechanical Properties of Ti(C,N)-Co-Mo2C Cermets
A.
Américo Vespucio 49, 41092 Sevilla, Spain a angela@us.es, Keywords: cermets, carbonitrides, pressureless sintering, high temperature mechanical properties, creep.
This means that besides improving the toughness of the Ti(C,N)-based cermets, which is still a major goal nowadays, their resistance to plastic deformation and high temperature mechanical properties needs to be extensively investigated.
A key aspect to achieve high mechanical performance and good mechanical properties is to control the ceramic-metal bond during sintering.
These factors can be controlled by the synthesis method.
Américo Vespucio 49, 41092 Sevilla, Spain a angela@us.es, Keywords: cermets, carbonitrides, pressureless sintering, high temperature mechanical properties, creep.
This means that besides improving the toughness of the Ti(C,N)-based cermets, which is still a major goal nowadays, their resistance to plastic deformation and high temperature mechanical properties needs to be extensively investigated.
A key aspect to achieve high mechanical performance and good mechanical properties is to control the ceramic-metal bond during sintering.
These factors can be controlled by the synthesis method.
Effect of Reinforcement Addition on Microstructure and Mechanical Properties of Al Matrix Composites
Online since: July 2014
Authors: Pei Peng Jin, Yu Tian Ding, Guo Jun Ma
amgj2150@126.com, bdingyutian@126.com, cjinpeipeng@hotmail.com
Keywords: Al matrix composites, Whisker, Hot extrusion, Mechanical properties, Microstructure
Abstract.
When the content of the reinforcement is 10%, the composites exhibit the best mechanical properties, meanwhile, it demonstrate cluster is unfavorable to the improvement of properties of materials.
Mechanical properties and fractographs.
The mechanical properties of Al matrix composites are mainly attributed to the interface bonding state and distribution of whiskers in the matrix [7,8].
That is because there are other factors that affect the strength of the composites, including the clustering and lower aspect ratio of the whisker.
When the content of the reinforcement is 10%, the composites exhibit the best mechanical properties, meanwhile, it demonstrate cluster is unfavorable to the improvement of properties of materials.
Mechanical properties and fractographs.
The mechanical properties of Al matrix composites are mainly attributed to the interface bonding state and distribution of whiskers in the matrix [7,8].
That is because there are other factors that affect the strength of the composites, including the clustering and lower aspect ratio of the whisker.
Online since: September 2014
Authors: Xiao Chen, Li Shun Chen, Jian Tong Xu
Research on Sodium Polyacrylate and its effects on Mechanical Properties of Slag-based Geopolymer
Xiao Chen1,a, Lishun Chen2,b, Jiantong Xu2,c
1Wuhan University of Technology, Materials Science and Engineering, Wuhan, China, 430070
2Wuhan University of Technology, Green building materials and manufacturing engineering research center of the ministry of education, Wuhan, China, 430070
aemail:1030183286@qq.com, bemail:chenxiao1981@whut.edu.cn, cemail: 610271871@qq.com
Keywords:slag-based geopolymer; sodium polyacrylate; dosage; mechanical properties
Abstract: This report mainly studied the influence of dosage of the sodium polyacrylate on mechanical properties of slag-based geopolymer, and secondary studied the effects on mechanical properties of polyacrylic acid.
The analyzing results indicate that compare to the polyacrylic acid, sodium polyacrylate has obvious effects on mechanical properties of slag-based geopolymer.
The mechanical properties of slag-based geopolymer doesn’t change with the dosage of sodium polyacrylate increase linearly, but overall mechanics properties is significantly superior to the blank sample.
(4)Sodium polyacrylate influence on slag-based geopolymer’s quality, and the mechanical properties of the slag-based geopolymer is not linear change with the increase of the dosage.
[5] Van JAARSVELD J S G,Van DEVENTER J S J,LORENZEN L.Factors affecting the immobilization of metals in geopoly-merized fly ash[J].Met Mater Trans(B),1998,29:283 -291
The analyzing results indicate that compare to the polyacrylic acid, sodium polyacrylate has obvious effects on mechanical properties of slag-based geopolymer.
The mechanical properties of slag-based geopolymer doesn’t change with the dosage of sodium polyacrylate increase linearly, but overall mechanics properties is significantly superior to the blank sample.
(4)Sodium polyacrylate influence on slag-based geopolymer’s quality, and the mechanical properties of the slag-based geopolymer is not linear change with the increase of the dosage.
[5] Van JAARSVELD J S G,Van DEVENTER J S J,LORENZEN L.Factors affecting the immobilization of metals in geopoly-merized fly ash[J].Met Mater Trans(B),1998,29:283 -291
Online since: March 2020
Authors: K. Sudhindra Srinivas, M. Murali Mohan
Experimental Investigation of Mechanical Properties of Ceramic Reinforced Al-7075 Metal Matrix Hybrid Composites
K.
Research relevant to these factors which influence particles distribution were noticed by conducting the experimental studies of Al7075 hybrid composites.The mechanical properties and the microstructure of Al–TiC-Si metal matrix composite has shown the significant improvement in Hardness and Tensile strength, with increase in TiC and Si particles in weight percentage of composites. 1.
The superior mechanical properties were obtained with Al7075-Si-TiC composites. 2.
The mechanical properties of the materials are listed in table 2.
v The weight percentage of reinforcement was most significant parameter affecting the hardness of composites produced by stir-casting process.
Research relevant to these factors which influence particles distribution were noticed by conducting the experimental studies of Al7075 hybrid composites.The mechanical properties and the microstructure of Al–TiC-Si metal matrix composite has shown the significant improvement in Hardness and Tensile strength, with increase in TiC and Si particles in weight percentage of composites. 1.
The superior mechanical properties were obtained with Al7075-Si-TiC composites. 2.
The mechanical properties of the materials are listed in table 2.
v The weight percentage of reinforcement was most significant parameter affecting the hardness of composites produced by stir-casting process.
Online since: October 2012
Authors: Ji Fang Yan, Xian Fu Wei, Bei Qing Huang
The Study of the Affect Factors on the Soaping Fastness Resistance of Inkjet Ink
Jifang Yana, Beiqing Huangb and Xianfu Weic
Beijing Institute of Graphic Communication, Beijing, 102600, P.R.China
ayanjifang0729@163.com , bhuangpeiqing@bigc.edu.cn, cweixianfu@bigc.edu.cn
Keywords: Soaping fastness, Curing temperature, Curing time, Particle size, Binder
Abstract.
This paper is to study factors that affect soaping color fastness of inkjet printing ink.
Considering curing condition as a constant, study the affect of other factors on soaping fastness of ink, like particle size, the binder content and varieties of binder.
There is important significance to improve soaping fastness by discussing these factors.
Fu: Preparation and Properties of Waterborne Dispersions of Ultrafine Organic Pigments (Ph.D.
This paper is to study factors that affect soaping color fastness of inkjet printing ink.
Considering curing condition as a constant, study the affect of other factors on soaping fastness of ink, like particle size, the binder content and varieties of binder.
There is important significance to improve soaping fastness by discussing these factors.
Fu: Preparation and Properties of Waterborne Dispersions of Ultrafine Organic Pigments (Ph.D.
Online since: December 2010
Authors: Zi Yang Cao, Hua Li
Study on the Mechanical Properties of the Elliptic Ultasonic Vibration Cutting Process
Hua Lia, ZiYang Caob
Suzhou university of science and technology , Suzhou P.R.China
alihua@mail.usts.edu.cn, bdukeczy@nuaa.edu.cn
Keywords: ultrasonic, elliptic vibration, cutting, mechanical property
Abstract.
In this paper, the mechanical properties of the elliptic ultrasonic vibratioon cutting were proposed systemiticaly through thoretical analysis,the model of the average cutting force in the elliptic ultrasonic vibration cutting process was established.
The performance of the the properties to the machining acurracy and the surface roughness was studied through experiment.
From Fig.1 the height of the residual part Δhz can be get as follow: (3) Δhz is one of the factors affecting the theoretical roughness in precision or ultra-precision machining and its value is determined by the cutting speed, the vibration frequency and the Y direction vibration amplitud
Under the affect of these properties, the dynamic cutting force is separated, the average cutting force deceases.
In this paper, the mechanical properties of the elliptic ultrasonic vibratioon cutting were proposed systemiticaly through thoretical analysis,the model of the average cutting force in the elliptic ultrasonic vibration cutting process was established.
The performance of the the properties to the machining acurracy and the surface roughness was studied through experiment.
From Fig.1 the height of the residual part Δhz can be get as follow: (3) Δhz is one of the factors affecting the theoretical roughness in precision or ultra-precision machining and its value is determined by the cutting speed, the vibration frequency and the Y direction vibration amplitud
Under the affect of these properties, the dynamic cutting force is separated, the average cutting force deceases.
Microstructure and Properties of Welding Joints of 7A52 Aluminium Alloy by the Friction Stir Welding
Online since: January 2014
Authors: Jin He Liu, Wen Liu, Chen Ye, Dong Gao Chen, Zhi Hua Ma
achendg2580@sina.com, bjinhliu@nwpu.edu.cn, cmzhbky2012@163.com, d1811028040@qq.com
e494254255@qq.com
Key words:7A52 Al alloy; Friction Stir Welding; microstructure; mechanical property
Abstract: The7A52 aluminum alloy of the 30mm thickness was welded by the friction stir welding.
The structure and the mechanical property of the welded joint was researched by the optical microscope and SEM, etc.
Therefore, in this paper, the author selected 30 mm thickness 7A52 aluminum alloy plate for single-channel friction stir welding test, and studied its friction stir welding process and mechanical property characteristics.
Generally speaking, the ranges of heat input factors are 3 ~ 6 when welding thickness aluminum alloy, (heat input factor = rotating speed / welding speed), the ranges of the rotating speed are 300r/min ~ 600r/min, the ranges of the welding speed are 50mm/min ~ 200mm/min along the weld direction.
Fig.2 The HV hardness distribution of welding joint Detection and analysis of the mechanical properties.Tensile testing of welded joints was doing according to the GB2651-2008,the results was shown in Table 2, the mean strength of the weld joint reached 364MPa,was 85.8% of the base metal strength.
The structure and the mechanical property of the welded joint was researched by the optical microscope and SEM, etc.
Therefore, in this paper, the author selected 30 mm thickness 7A52 aluminum alloy plate for single-channel friction stir welding test, and studied its friction stir welding process and mechanical property characteristics.
Generally speaking, the ranges of heat input factors are 3 ~ 6 when welding thickness aluminum alloy, (heat input factor = rotating speed / welding speed), the ranges of the rotating speed are 300r/min ~ 600r/min, the ranges of the welding speed are 50mm/min ~ 200mm/min along the weld direction.
Fig.2 The HV hardness distribution of welding joint Detection and analysis of the mechanical properties.Tensile testing of welded joints was doing according to the GB2651-2008,the results was shown in Table 2, the mean strength of the weld joint reached 364MPa,was 85.8% of the base metal strength.
Online since: April 2021
Authors: Yuliia B. Egorova, Lyudmila V. Davydenko, Alisa V. Shmyrova
Prediction of Mechanical Properties of Ti-6AI-4V Titanium Alloy Bars Depending on Aluminum and Molybdenum Strength Equivalents
Yu.B.
The following factors were analyzed: aluminum and molybdenum strength equivalents, standard mechanical properties (tensile strength σв, proof strength σ0,2, elongation δ, reduction of area ψ, impact toughness KCU), microstructure type and parameters (α-plate thickness bα, α-globule size aα), bar diameter, annealing temperature tann.
Pair and multiple correlation coefficients R were determined to estimate strength of the statistical connection between the studied factors.
According to the correlation analysis, annealing temperature, structure type and dimensions of structural components in the studied range barely affect mechanical properties of bars (correlations coefficients R < 0.3), most probably due to narrow change ranges.
The test of the proposed models demonstrated satisfactory correlation of estimated and actual values of mechanical properties of studied semi-finished properties.
The following factors were analyzed: aluminum and molybdenum strength equivalents, standard mechanical properties (tensile strength σв, proof strength σ0,2, elongation δ, reduction of area ψ, impact toughness KCU), microstructure type and parameters (α-plate thickness bα, α-globule size aα), bar diameter, annealing temperature tann.
Pair and multiple correlation coefficients R were determined to estimate strength of the statistical connection between the studied factors.
According to the correlation analysis, annealing temperature, structure type and dimensions of structural components in the studied range barely affect mechanical properties of bars (correlations coefficients R < 0.3), most probably due to narrow change ranges.
The test of the proposed models demonstrated satisfactory correlation of estimated and actual values of mechanical properties of studied semi-finished properties.
Online since: April 2015
Authors: Miroslav Gombar, Lydia Sobotova, Miroslav Badida, Jan Kmec, Daniel Kucerka
In order to improve the mechanical properties of the layer deposited by anodic oxidation of aluminium on the material EN AW-1050 H24, in the contribution was investigated the microhardness of the deposited layer as a function of the physic-chemical factors affecting in the process of anodic oxidation at the constant anodic current density J = 3 A.dm-2 in electrolyte formed by sulphuric acid and oxalic acid, with the emphasis on the influence of electrolyte temperature in the range – 1,78 °C to 45,78 °C.
In many of these applications a key role is played by the mechanical properties, wear resistance and corrosion resistance [5 - 7].
Based on the published studies on the mechanical properties of anodic oxide layers, focusing particularly on the microhardness, we can state that there is very often an emphasis on the influence of electrolyte temperature and applied current density without considering other factors.
Therefore, in this study is observed not only the influence of electrolyte temperature but also the influence of other chemical and physical factors affecting the thickness and also the mechanical properties of resulting anodic oxide films formed in the electrolyte containing sulphuric acid and oxalic acid.
In regard to the complexity of the anodizing process of aluminium and its alloys, it is necessary to monitor the temperature effect in interaction with other factors affecting at actual current density and not as the only factor influencing the observed parameter.
In many of these applications a key role is played by the mechanical properties, wear resistance and corrosion resistance [5 - 7].
Based on the published studies on the mechanical properties of anodic oxide layers, focusing particularly on the microhardness, we can state that there is very often an emphasis on the influence of electrolyte temperature and applied current density without considering other factors.
Therefore, in this study is observed not only the influence of electrolyte temperature but also the influence of other chemical and physical factors affecting the thickness and also the mechanical properties of resulting anodic oxide films formed in the electrolyte containing sulphuric acid and oxalic acid.
In regard to the complexity of the anodizing process of aluminium and its alloys, it is necessary to monitor the temperature effect in interaction with other factors affecting at actual current density and not as the only factor influencing the observed parameter.