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Online since: July 2016
Authors: Jei Pil Wang, Jung Yeul Yun, Da Hee Park
In this study, Fe foam with greater than 90% porosity, 2-mm pore size was successfully fabricated using a slurry coating process and the pore properties were characterized.
Various factors affecting pore size and the structure of Fe foam fabricated using the slurry coating process can be taken into consideration.
Table 1 Pore properties of Fe foam fabricated by slurry coating processes.
It can be inferred that this change in the strut microstructure will affect the mechanical properties of the Fe foam; thus, there are plans to conduct a mechanical property evaluation in the future.
Then, the resultant pore properties were analyzed.
Various factors affecting pore size and the structure of Fe foam fabricated using the slurry coating process can be taken into consideration.
Table 1 Pore properties of Fe foam fabricated by slurry coating processes.
It can be inferred that this change in the strut microstructure will affect the mechanical properties of the Fe foam; thus, there are plans to conduct a mechanical property evaluation in the future.
Then, the resultant pore properties were analyzed.
Online since: October 2011
Authors: Lian Fa Yang, Xian Chang Mao, Zhi Hua Tao
Loading path is one of the most efficacious factors which affect the THF process and quality of hydroforming parts.
The quality of these parts is affected by microstructure defects, part geometry, material properties, tribological factors and loading path, i.e. internal pressure and axial feeding respectively relate to time curves.
Parameters of loading path are affected by material properties, blank geometry, friction condition of tube-die interface, part geometry.
In a researching of free bulging process, the properties of strain path, i.e. the ratio of axial and circumferential strain increment, localized instability and buckling instability have been analyzed by Z.
Based on experimental experience and forming behavior, properties of optimal loading paths are summarized and speculated by many experiments.
The quality of these parts is affected by microstructure defects, part geometry, material properties, tribological factors and loading path, i.e. internal pressure and axial feeding respectively relate to time curves.
Parameters of loading path are affected by material properties, blank geometry, friction condition of tube-die interface, part geometry.
In a researching of free bulging process, the properties of strain path, i.e. the ratio of axial and circumferential strain increment, localized instability and buckling instability have been analyzed by Z.
Based on experimental experience and forming behavior, properties of optimal loading paths are summarized and speculated by many experiments.
Online since: August 2021
Authors: Ziad El Sayed, Mohamed Abd-Alrazzaq, Islam El-Galy
Each type has unique properties, production techniques, and applications [3].
Fig.1 The workflow of production and testing of open-cell foam based on leachable material infiltration Among the most significant factors affecting the mechanical behavior of metal foams are the size as well as the form of cell struts, which form the skeleton of the open foam, and the foam relative density, which is the ratio between the density of the foam and the density of the base metal.
The preliminary physical and mechanical properties are evaluated to validate the system’s capabilities and assure its reliability and repeatability.
Ashby, Cellular solids: structure and properties, 2nd ed.
Zhao, “Effect of pore size and relative density on the mechanical properties of open cell aluminum foams,” Scripta Materialia, vol. 56, no. 2, pp. 169-172, 2007
Fig.1 The workflow of production and testing of open-cell foam based on leachable material infiltration Among the most significant factors affecting the mechanical behavior of metal foams are the size as well as the form of cell struts, which form the skeleton of the open foam, and the foam relative density, which is the ratio between the density of the foam and the density of the base metal.
The preliminary physical and mechanical properties are evaluated to validate the system’s capabilities and assure its reliability and repeatability.
Ashby, Cellular solids: structure and properties, 2nd ed.
Zhao, “Effect of pore size and relative density on the mechanical properties of open cell aluminum foams,” Scripta Materialia, vol. 56, no. 2, pp. 169-172, 2007
Online since: September 2019
Authors: Norrul Azmi Yahya, Azerai Ali Rahman, Siong Wee Lee, Chai Lian Oh, Mohd Raizamzamani Md Zain
Bhd. with the chemical compositions and physical properties as depicted Table 2.
This indicates that sieved RCF was not jeopardize the hardened properties of ECC and this finding is contradicted to the previous research [14-16].
Oh and M.R.M Zain, Evaluation of the design mix proportion on mechanical properties of engineered cementitious composites.
Baum, Effect of high levels of fines content on concrete properties, ACI Mater J. 103 (6) (2006) 474-482
Yang, Macroscopic and microstructural properties of engineered cementitious composites incorporating recycled concrete fines.
This indicates that sieved RCF was not jeopardize the hardened properties of ECC and this finding is contradicted to the previous research [14-16].
Oh and M.R.M Zain, Evaluation of the design mix proportion on mechanical properties of engineered cementitious composites.
Baum, Effect of high levels of fines content on concrete properties, ACI Mater J. 103 (6) (2006) 474-482
Yang, Macroscopic and microstructural properties of engineered cementitious composites incorporating recycled concrete fines.
Online since: May 2021
Authors: Sergey Voinash, Alexey V. Kamenchukov, Аbdul Мudalif Dzhasheev, Boris Tarasenko, Evgeny Shapiro
Introduction
Improving the reliability of repaired vehicles (units), no doubt, depends on the properties of restoring friction surfaces.
Wear The process of wear of parts is accompanied by complex physical and chemical phenomena and a variety of factors influencing it [1].
Accompanying types of wear are molecular-mechanical and corrosion-mechanical wear with all its types, which affect wear and under certain conditions can become the leading wear processes.
Factors, intervals and levels of variation are presented in Table 1.
As a result of the tests, a second-order regression equation was obtained, which takes into account factors such as the number of wire turns and the width of a square wire that affect the reduction of the engine running-in time. 4.
Wear The process of wear of parts is accompanied by complex physical and chemical phenomena and a variety of factors influencing it [1].
Accompanying types of wear are molecular-mechanical and corrosion-mechanical wear with all its types, which affect wear and under certain conditions can become the leading wear processes.
Factors, intervals and levels of variation are presented in Table 1.
As a result of the tests, a second-order regression equation was obtained, which takes into account factors such as the number of wire turns and the width of a square wire that affect the reduction of the engine running-in time. 4.
Online since: June 2008
Authors: H.U. Hong, Jong B. Lee
Therefore, this paper highlights the investigation on metallurgical factors affecting significantly
HIC occurrence at bondline including center segregation effects, and to discuss the effect of ERW
variables on the factors.
Table 1 shows the chemical composition and typical properties of the parent material.
The chemical composition, mechanical and HIC properties of the strip for X60 ERW line pipe.
Then, analysis on the effect of the factors was done, and finally DOE optimization was established based on the test results.
This result is consistent with the fact that the main factor affecting HIC occurrence at the bondline is penetrators, such as an oxide inclusion and segregation effects are negligible.
Table 1 shows the chemical composition and typical properties of the parent material.
The chemical composition, mechanical and HIC properties of the strip for X60 ERW line pipe.
Then, analysis on the effect of the factors was done, and finally DOE optimization was established based on the test results.
This result is consistent with the fact that the main factor affecting HIC occurrence at the bondline is penetrators, such as an oxide inclusion and segregation effects are negligible.
Online since: May 2011
Authors: Jia Cheng Wang, Jian Lin Li, Le Hua Wang
With the impact of rainfall, the water content of gravel soil increases, and the water table changes, this eventually affects the mechanical properties of gravel soils.
On the one hand the water reduces the mechanical strength of high slope slide surface, on the other hand the weight of slope body increased.
Owing to its large sized sample, large-scale direct shear apparatus can keep a greater extent graded gravel soil properties and weaken the size effect, which leads to a more accurate result of the gravel soil strength.
Conclusions Through indoor large direct shear experiment test under different water content on gravel soil at the new city of Badong County, we can come to the following conclusions: The mechanical characteristics of grave slope body will be affected as its soil water content gradually increases along with the increase of rainfall.
The large-scale direct shear test and analysis further shows that the influence of water content and gradation are greater than any other factors.
On the one hand the water reduces the mechanical strength of high slope slide surface, on the other hand the weight of slope body increased.
Owing to its large sized sample, large-scale direct shear apparatus can keep a greater extent graded gravel soil properties and weaken the size effect, which leads to a more accurate result of the gravel soil strength.
Conclusions Through indoor large direct shear experiment test under different water content on gravel soil at the new city of Badong County, we can come to the following conclusions: The mechanical characteristics of grave slope body will be affected as its soil water content gradually increases along with the increase of rainfall.
The large-scale direct shear test and analysis further shows that the influence of water content and gradation are greater than any other factors.
Online since: February 2012
Authors: Zhong Zhong Chen, Yi Gong Wang
Because ink permeates the interior of material, therefore small scratch can not affect its appearance. [1]
Problems
The application of WPC in furniture market, environmental art and sanitary location are restricted by various factors, such as production mode and surface quality.
On the other hand, aesthetic and diversified forms, clean and comfortable requirement are all equally important; all of these factors shall be considered in the furniture market.
Rockwell hardness of WPC less than 58 HRC is too insufficiency according to the material properties.
The mechanical properties of WPC satisfy the application of art furniture and classical painting style, and it has a certain market advantages for its low cost.
Besides, it can not affect the whole appearance (Fig. 4).
On the other hand, aesthetic and diversified forms, clean and comfortable requirement are all equally important; all of these factors shall be considered in the furniture market.
Rockwell hardness of WPC less than 58 HRC is too insufficiency according to the material properties.
The mechanical properties of WPC satisfy the application of art furniture and classical painting style, and it has a certain market advantages for its low cost.
Besides, it can not affect the whole appearance (Fig. 4).
Online since: August 2016
Authors: Petr Lenfeld, Martin Boruvka, Jiří Habr, Luboš Bĕhálek, Chakaphan Ngaowthong
The superior mechanical properties of PALFs is related to high content of alpha-cellulose and low microfibrillar angle (14°) [16].
Physical and mechanical properties of PALF are depicted in Table 3.
George et al. [17] reported that mechanical properties of composites are generally affected by the volume fraction of the added reinforcement, successful dispersion in the matrix, good fibre-matrix adhesion, fibre aspect ratio, fibre orientation as well as stress transfer efficiency of the interface.
The crystallinity may strongly influence mechanical properties of semicrystalline polymers.
The crystallinity may strongly influence mechanical properties of semicrystalline polymers.
Physical and mechanical properties of PALF are depicted in Table 3.
George et al. [17] reported that mechanical properties of composites are generally affected by the volume fraction of the added reinforcement, successful dispersion in the matrix, good fibre-matrix adhesion, fibre aspect ratio, fibre orientation as well as stress transfer efficiency of the interface.
The crystallinity may strongly influence mechanical properties of semicrystalline polymers.
The crystallinity may strongly influence mechanical properties of semicrystalline polymers.
Online since: May 2004
Authors: Faik Nuzhet Oktar, H. Demirkıran, G. Göller, D. Toykan, Lutfiye Sevgi Özyeğin, Yasin Genc, E.Z. Erkmen, H. Haybat
., R & D Center, Çayırova, Gebze, Kocaeli, Turkey
Keywords: Hydroxyapatite, sintering, compacts, mechanical properties
Abstract.
Hydroxyapatite (HA) is a particularly attractive material for bone and tooth implants because of its chemical and crystallographic properties, which closely resemble those of bone and tooth minerals.
The present study was conducted to examine the influence of sintering temperature on the mechanical properties of the pure HA compacts.
Contrary to the above case, the factor of the sintering temperature has a significant effect on microhardness (F = 18.03 p-value = 0.009).
Summary Density determination, microhardness and compression tests were carried out for synthetic HA to see the main changes in the mechanical properties and it is planned to use these data as reference measurements for future sintered HA studies.
Hydroxyapatite (HA) is a particularly attractive material for bone and tooth implants because of its chemical and crystallographic properties, which closely resemble those of bone and tooth minerals.
The present study was conducted to examine the influence of sintering temperature on the mechanical properties of the pure HA compacts.
Contrary to the above case, the factor of the sintering temperature has a significant effect on microhardness (F = 18.03 p-value = 0.009).
Summary Density determination, microhardness and compression tests were carried out for synthetic HA to see the main changes in the mechanical properties and it is planned to use these data as reference measurements for future sintered HA studies.