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Online since: September 2016
Authors: Shu Hua Lu, Xiang Ling, Jin Chun Zhang
Thermal expansion coefficient of the cladding material and matrix and high temperature gradient are considered as the main factors [3-4].
Corrosion properties of in situ laser remelted NiCrBSi coatings comparison with hard chromium coatings, J.
Luo, Effects of high temperature treatment on microstructure and mechanical properties of laser-clad NiCrBSi/WC coatings on titanium alloy substrate, Mater.
Qu, et al., Effects of the thickness of the pre-placed layer on microstructural evolution and mechanical properties of the laser-clad coatings, J.
Awasthi, et al., Effect of specific energy input on microstructure and mechanical properties of nickel-base intermetallic alloy deposited by laser cladding, Metal.
Corrosion properties of in situ laser remelted NiCrBSi coatings comparison with hard chromium coatings, J.
Luo, Effects of high temperature treatment on microstructure and mechanical properties of laser-clad NiCrBSi/WC coatings on titanium alloy substrate, Mater.
Qu, et al., Effects of the thickness of the pre-placed layer on microstructural evolution and mechanical properties of the laser-clad coatings, J.
Awasthi, et al., Effect of specific energy input on microstructure and mechanical properties of nickel-base intermetallic alloy deposited by laser cladding, Metal.
Online since: August 2011
Authors: Gang Wu, Chun Hua Zhao, Hong Ling Qin, Xian You Zhong
The tribological properties of normal UHMWPE and porous UHMWPE were studied under different loads and lubricant on an improved tribological tester.
They found that the size, shape and content of the porogen in the molding mixture greatly affect the physical properties of the final porous sample.
Tribological properties and microstructure of this porous material have also been determined and analyzed.
Porous UHMWPE has porous structure, the mechanical properties is not as strong as normal UHMWPE.
Compare with that of UHMWPE sample, we attributed this change to the decrease of mechanical properties of porous UHMWPE.
They found that the size, shape and content of the porogen in the molding mixture greatly affect the physical properties of the final porous sample.
Tribological properties and microstructure of this porous material have also been determined and analyzed.
Porous UHMWPE has porous structure, the mechanical properties is not as strong as normal UHMWPE.
Compare with that of UHMWPE sample, we attributed this change to the decrease of mechanical properties of porous UHMWPE.
Online since: June 2018
Authors: Khushdeep Goyal, Deepak Kumar Goyal, Kuldeep Singh
Selection of factors
The selection of factors depends upon the response characteristics.
The numbers of factors with different levels are shown in Table 2.
In this experiment set up there are four factors with 3 levels.
Based on analysis of mean data, the input parameters pulse on time and pulse off time are significant factors that will affect the material removal rate.
Saghafian, "Evaluation of the mechanical properties of Niobium modified cast AISI H 13 hot work tool steel," Iranian Journal of Materials Science and Engineering, Vol. 7, No. 2, pp. 22-29, 2010
The numbers of factors with different levels are shown in Table 2.
In this experiment set up there are four factors with 3 levels.
Based on analysis of mean data, the input parameters pulse on time and pulse off time are significant factors that will affect the material removal rate.
Saghafian, "Evaluation of the mechanical properties of Niobium modified cast AISI H 13 hot work tool steel," Iranian Journal of Materials Science and Engineering, Vol. 7, No. 2, pp. 22-29, 2010
Online since: July 2019
Authors: Reeti Singh, Jagannadh V.S.N. Sripada, Megil F. Gallant, Jan Kondas, Gobinda C. Saha
Tantalum as a transition element possesses good corrosion resistant properties, along with ductility and hardness.
Further mechanical properties of the coating in terms of hardness is carried out by nanoindentation.
Gas outlet velocity is the most important factor that effects the coating deposition.
These values are used to produce stress-strain curves and gather various mechanical properties of the sample, presented in Fig. 6.
Koivuluoto, Corrosion properties of Cold-Sprayed Tantalum Coatings, Journal of Thermal Spray Technology. 18 (2009) 75-82
Further mechanical properties of the coating in terms of hardness is carried out by nanoindentation.
Gas outlet velocity is the most important factor that effects the coating deposition.
These values are used to produce stress-strain curves and gather various mechanical properties of the sample, presented in Fig. 6.
Koivuluoto, Corrosion properties of Cold-Sprayed Tantalum Coatings, Journal of Thermal Spray Technology. 18 (2009) 75-82
Online since: February 2007
Authors: Xue Min Cui, Shi Xi Ouyang, Ji Zhou, Yong Huang, Chang An Wang
This paper studied on the rheological behaviors of
the suspensions and drying process of aqueous slurries with latex binder system, and the research
results indicated the rheological behaviors was affected by pH value, solid loading and dispersant
(PAA-NH4) additives; and the drying speed of slurries was most decided by drying temperature and
slurry coating thickness.
Mass Dist.(%) Diameter(µm) 2 3 4 5 6 7 8 9 10 11 -40 -35 -30 -25 -20 (b) pure latex solution Zeta Potensial£¨mv£© pH Fig.1 (a) Distribution of alumina powder diameter and (b) Zeta potential of emulsion binder mechanical properties and lamination behaviors.
The result showed that the pH value would greatly affect the zeta potential and dispersive effects of dispersant.
In a word, the main experimental factors which influenced the stability of the slurry, were the properties of dispersant and pH value.
The PAA-NH4 was an effective dispersant to slurry of latex binder, and the main experimental factors which influenced the stability of the slurry, were the properties of dispersant and pH value.The research results showed the glass transition temperature of latex ( Tg ) was also importance to form film.
Mass Dist.(%) Diameter(µm) 2 3 4 5 6 7 8 9 10 11 -40 -35 -30 -25 -20 (b) pure latex solution Zeta Potensial£¨mv£© pH Fig.1 (a) Distribution of alumina powder diameter and (b) Zeta potential of emulsion binder mechanical properties and lamination behaviors.
The result showed that the pH value would greatly affect the zeta potential and dispersive effects of dispersant.
In a word, the main experimental factors which influenced the stability of the slurry, were the properties of dispersant and pH value.
The PAA-NH4 was an effective dispersant to slurry of latex binder, and the main experimental factors which influenced the stability of the slurry, were the properties of dispersant and pH value.The research results showed the glass transition temperature of latex ( Tg ) was also importance to form film.
Online since: November 2022
Authors: Olusoji Oluremi Ayodele, Peter Apata Olubambi
a*Olusojia@uj.ac.za, bpolubambi@uj.ac.za
Keywords: Titanium alloy, Tensile properties, Wear, Microstructures, and Mechanical properties.
However, for Ti alloys to compete with nickel-based and superalloys, their mechanical properties must be enhanced by developing Ti-based composites.
Several factors can affect the microhardness of a sample.
Olubambi, Microstructures and mechanical properties of ceramics reinforced titanium matrix fabricated by pulsed electric current sintering, J.
Johnson, Effect of a high-temperature cycle on the mechanical properties of silicon carbide/titanium metal matrix composites, J.
However, for Ti alloys to compete with nickel-based and superalloys, their mechanical properties must be enhanced by developing Ti-based composites.
Several factors can affect the microhardness of a sample.
Olubambi, Microstructures and mechanical properties of ceramics reinforced titanium matrix fabricated by pulsed electric current sintering, J.
Johnson, Effect of a high-temperature cycle on the mechanical properties of silicon carbide/titanium metal matrix composites, J.
Online since: August 2013
Authors: Zhao Ning Zhang
Due to the shrinkage, creep, friction and other factors, the pre-stress applied to the beam is not a constant.
Introduction Being good mechanical properties, the pre-stressed concrete box girder is widely used on highway and city bridges.
Therefore, scholars in China and other countries have made a thorough study of the problem and found that the pre-stress loss is one of the main factors affecting the stiffness of the pre-stressed concrete bridge in service.
In order to simplify the problem, the pre-stress loss of the beam at different location is regarded as a constant which comprehensively reflects the influence of the internal and external factors.
Due to the measured deflection of bridge under different time, temperature and other factors, the value is looked upon as a comprehensive value that is correspond with the particular period of time and particular condition.
Introduction Being good mechanical properties, the pre-stressed concrete box girder is widely used on highway and city bridges.
Therefore, scholars in China and other countries have made a thorough study of the problem and found that the pre-stress loss is one of the main factors affecting the stiffness of the pre-stressed concrete bridge in service.
In order to simplify the problem, the pre-stress loss of the beam at different location is regarded as a constant which comprehensively reflects the influence of the internal and external factors.
Due to the measured deflection of bridge under different time, temperature and other factors, the value is looked upon as a comprehensive value that is correspond with the particular period of time and particular condition.
Online since: November 2016
Authors: Bu Seong Jang, Chang Hyun Lee, Jae Woong Choi, Ji Seon Kwon, Ha Kyung Kim, Chang Hwan Park, Hwa Min Kim
Their mechanical properties, such as nanoindentation hardness, friction coefficient, and wettability have been investigated.
The effect of the working pressure (N2) on the mechanical properties of TiN films is discussed.
The dependence of the mechanical properties on various working pressures and film microstructure is a major concerns of this study.
This reveals that the orientation of TiN films changes toward the (111) orientation due to increased ion bombardment which favors low energy at (111) orientation which influence the structure and mechanical properties of the growing films.
To investigate structural and mechanical properties of TiN coatings.
The effect of the working pressure (N2) on the mechanical properties of TiN films is discussed.
The dependence of the mechanical properties on various working pressures and film microstructure is a major concerns of this study.
This reveals that the orientation of TiN films changes toward the (111) orientation due to increased ion bombardment which favors low energy at (111) orientation which influence the structure and mechanical properties of the growing films.
To investigate structural and mechanical properties of TiN coatings.
Online since: August 2014
Authors: Ji Yao, Xing Wei Xu
Table 2 Record for the mechanical properties of concrete(MPa)
Test number
Index 1
Index 2
Index 3
1
28.4
25.6
12.6
2
27.6
30.2
16.8
3
27.9
30.6
19.3
4
28.4
33.2
23.6
5
30.5
29.8
15.4
6
27.1
35.7
21.4
7
29.8
25.3
12.5
8
26.4
28.5
15.4
Analysis for tests results
In order to better study the impact of various factors on the heat-resistant concrete, variance analysis is used to analyze the tests above.
To examine what factors influence the results, and distinguish what is the main factor affecting the test results, which is secondary factor, which main factors should focus on in research. 3.1 Analysis of variance 3.1.1 Analysis of variance for index 1 According to Table 2, the total average, deviation squared and contribution rate of the strength for index 1 is calculated, as shown in Table 3.
Table 9 Designed standard strength(MPa) Factor Level A B C D E K1 112.3 116.3 112.2 116.6 109.8 K2 113.8 109.8 113.9 109.5 116.3 R(range) 1.5 6.5 1.7 7.1 6.5 The range analysis showed that the optimum results is A2B1C2D1E2, A, C f actors have small influence on the thermal properties of concrete.
Table 10 Drying strength(MPa) Factor Level A B C D E K1 119.6 110.9 109.6 111.3 120.4 K2 119.3 128 129.3 127.6 118.5 R(range) 0.3 17.1 19.7 16.3 1.9 The range analysis showed that the optimum results is A1B2C2D2E1, A, E factors have small influence on the thermal properties of concrete, then could be ignored.
Table 11 Residual strength(MPa) actor Level A B C D E K1 76.3 63.3 64.3 65.8 72.7 K2 68.7 81.7 80.7 79.2 72.3 R(range) 7.6 18.4 16.4 13.4 0.4 The range analysis showed that the optimum results is A1B2C2D2E1, A, E factors have small influence on the thermal properties of concrete, then could be ignored.
To examine what factors influence the results, and distinguish what is the main factor affecting the test results, which is secondary factor, which main factors should focus on in research. 3.1 Analysis of variance 3.1.1 Analysis of variance for index 1 According to Table 2, the total average, deviation squared and contribution rate of the strength for index 1 is calculated, as shown in Table 3.
Table 9 Designed standard strength(MPa) Factor Level A B C D E K1 112.3 116.3 112.2 116.6 109.8 K2 113.8 109.8 113.9 109.5 116.3 R(range) 1.5 6.5 1.7 7.1 6.5 The range analysis showed that the optimum results is A2B1C2D1E2, A, C f actors have small influence on the thermal properties of concrete.
Table 10 Drying strength(MPa) Factor Level A B C D E K1 119.6 110.9 109.6 111.3 120.4 K2 119.3 128 129.3 127.6 118.5 R(range) 0.3 17.1 19.7 16.3 1.9 The range analysis showed that the optimum results is A1B2C2D2E1, A, E factors have small influence on the thermal properties of concrete, then could be ignored.
Table 11 Residual strength(MPa) actor Level A B C D E K1 76.3 63.3 64.3 65.8 72.7 K2 68.7 81.7 80.7 79.2 72.3 R(range) 7.6 18.4 16.4 13.4 0.4 The range analysis showed that the optimum results is A1B2C2D2E1, A, E factors have small influence on the thermal properties of concrete, then could be ignored.
Online since: March 2014
Authors: Hanan A. El Nouhy
Fire resistance of concrete is affected by factors like the type of aggregate and cement used the temperature and duration of the fire, size of the structural member, and moisture content of concrete [1].
Siddique et al, studied the mechanical properties of concrete made with ground granulated blast furnace slag subjected to temperatures up to 350°С.
Table 5 shows the physical properties of coarse aggregates.
In some cases, the first factor becomes the governing factor, while in other cases; the second factor becomes the overriding factor.
Properties of Concrete Containing Non ground Ash and Slag as Fine Aggregate.
Siddique et al, studied the mechanical properties of concrete made with ground granulated blast furnace slag subjected to temperatures up to 350°С.
Table 5 shows the physical properties of coarse aggregates.
In some cases, the first factor becomes the governing factor, while in other cases; the second factor becomes the overriding factor.
Properties of Concrete Containing Non ground Ash and Slag as Fine Aggregate.