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Online since: March 2015
Authors: Alexandru Ghiban, Brandusa Ghiban, Mihai Buzatu, Cristina Maria Bortun
Whatever method (either laser or material deposition) used for repairing or complete bad zones, at dental works, during procedures many structural modifications take place, especially in heat affected zones.
In general removable partial dentures are realized from cobalt based alloys, such as Co-Cr-Mo, due to simultaneously properties, such as: high mechanical characteristics (yielding strength, ultimate strength, and hardness), biocompatibility, or wear resistance [16-20].
Quality welds can appreciate the value of the factor p / l (p = depth of weld zone, 1 = width of welded area).
Factor p / m varies depending on the nature of the alloy, the mode and parameters of the laser factor p / it reaches the maximum value when 60-70% overlap of the melting zones in succession.
Part 1: Mechanical properties, J Prosthodont 2 (1993) 144-50
In general removable partial dentures are realized from cobalt based alloys, such as Co-Cr-Mo, due to simultaneously properties, such as: high mechanical characteristics (yielding strength, ultimate strength, and hardness), biocompatibility, or wear resistance [16-20].
Quality welds can appreciate the value of the factor p / l (p = depth of weld zone, 1 = width of welded area).
Factor p / m varies depending on the nature of the alloy, the mode and parameters of the laser factor p / it reaches the maximum value when 60-70% overlap of the melting zones in succession.
Part 1: Mechanical properties, J Prosthodont 2 (1993) 144-50
Online since: September 2023
Authors: Karamala Usman, Y. Rameswara Reddy
Scholar, Mechanical Engineering, JNTUA CE Pulivendula, Constitute College of Jawaharlal Nehru, Technological University Anantapuram.
Although the main effects of certain polymer additives on the mechanical properties of mortars are known, the mechanisms responsible for these effects are not yet well understood.
Al. [4] This study is focused on the properties of composite sandstone bricks containing recycled concrete aggregate and waste polyethylene terephthalate.
The objective is to determine the mechanical properties such as compressive strength and water absorption of composite bricks containing recycled concrete aggregate and waste polyethylene terephthalate and to determine the optimal mixture ratio of bricks containing recycled concrete aggregate and waste polyethylene terephthalate.
Sand and Waste Plastic based tiles do not get affected by water and hence shall be one of the best replacements for sand and cement-based tiles 3.
Although the main effects of certain polymer additives on the mechanical properties of mortars are known, the mechanisms responsible for these effects are not yet well understood.
Al. [4] This study is focused on the properties of composite sandstone bricks containing recycled concrete aggregate and waste polyethylene terephthalate.
The objective is to determine the mechanical properties such as compressive strength and water absorption of composite bricks containing recycled concrete aggregate and waste polyethylene terephthalate and to determine the optimal mixture ratio of bricks containing recycled concrete aggregate and waste polyethylene terephthalate.
Sand and Waste Plastic based tiles do not get affected by water and hence shall be one of the best replacements for sand and cement-based tiles 3.
Online since: September 2016
Authors: Yi Liang Zhang, Jun Ming Zhou, Jia Gen Peng, Shou Liang Hu, Qi Le Gao
Introduction
At present, ceramic-metal composite has been widely used in fields like electronic industry, space, atomic energy, high-energy physics, energy transportation, machinery, chemical industry, textile industry and so on.0 Al2O3 ceramic has lots of great properties such as high strength, high hardness, high temperature resistance, corrosion resistance, wear resistance and good insulation.
However the residual stress generated in welding process directly affects the service life of the structure.
Fig. 2 shows the mechanical model of uniform strength beam which was used in the test.According to the formula (1) Any point of stress can be calculated with certain F, b and h.
Ling: Residual stress analysis of influence factors to brazing welding joint of glass and kovar alloy [J].
Fry and F.A Kandil: A Study of Paramaters Affecting the Quality of Residual Stress Measurements Using XRD[J], Materials Science Forum, (2002), p.404, p.579.
However the residual stress generated in welding process directly affects the service life of the structure.
Fig. 2 shows the mechanical model of uniform strength beam which was used in the test.According to the formula (1) Any point of stress can be calculated with certain F, b and h.
Ling: Residual stress analysis of influence factors to brazing welding joint of glass and kovar alloy [J].
Fry and F.A Kandil: A Study of Paramaters Affecting the Quality of Residual Stress Measurements Using XRD[J], Materials Science Forum, (2002), p.404, p.579.
Online since: September 2010
Authors: Imre Felde, Tamás Réti
The method
called Quench Factor Analysis, which incorporates phase transformation kinetics into quenchant
characterization [5, 6] is also commonly used.
Outlined in this paper is a complex system, based on a general concept, allowing for the quantitative characterisation of the heat transfer of a cooling medium, as well as, the mechanical properties of the material developed as a result of hardening.
The predicted results imply that the set of quenching parameters investigated are "equivalent" with respect to the properties developed during the hardening process.
In addition, the appropriate set of process parameters affecting the cooling performance of a quenchant, i.e. temperature, concentration, agitation rate, etc., can be determined using the method and software described.
Konkoly: Computerized properties prediction and technology planning in heat treatment of steels , in ASM handbook , Vol. 4, Heat treating , 638- 656; 1981, Materials Park, OH, ASM International
Outlined in this paper is a complex system, based on a general concept, allowing for the quantitative characterisation of the heat transfer of a cooling medium, as well as, the mechanical properties of the material developed as a result of hardening.
The predicted results imply that the set of quenching parameters investigated are "equivalent" with respect to the properties developed during the hardening process.
In addition, the appropriate set of process parameters affecting the cooling performance of a quenchant, i.e. temperature, concentration, agitation rate, etc., can be determined using the method and software described.
Konkoly: Computerized properties prediction and technology planning in heat treatment of steels , in ASM handbook , Vol. 4, Heat treating , 638- 656; 1981, Materials Park, OH, ASM International
Online since: January 2015
Authors: Jian Kong, Lin Che
Factors such as the state of liquid iron and cooling conditions are determined.
Good control of the above questions, you can produce excellent comprehensive properties of vermicular cast iron.
The vermicular cast iron has the oxidation resistance, heat resistance, thermal conductivity at the same time, to ensure the good casting properties.
Mechanical design and manufacturing, in March 2008
Microstructure and properties of thin walled vermicular cast iron.
Good control of the above questions, you can produce excellent comprehensive properties of vermicular cast iron.
The vermicular cast iron has the oxidation resistance, heat resistance, thermal conductivity at the same time, to ensure the good casting properties.
Mechanical design and manufacturing, in March 2008
Microstructure and properties of thin walled vermicular cast iron.
Online since: December 2013
Authors: A. Erman Tekkaya, Andreas Jäger, Celal Soyarslan, Matthias Haase, Stefan Ossenkemper
The main influencing factor is the extrusion temperature [2].
In case of a distinct texture, the mechanical properties of the profiles are anisotropic.
The specimens were machined out of extruded aluminum profiles, which were manufactured with different tool types for a comparison of the properties of the extruded profiles.
The observed difference of the weld-line in its hardness properties is reflected to the models using the reduced (by 15%) yield strength.
Following in the same footsteps, a more detailed approach should involve a detailed quantitative comparison based on the measured 3D anisotropic properties and their distributions over the extrudate sections.
In case of a distinct texture, the mechanical properties of the profiles are anisotropic.
The specimens were machined out of extruded aluminum profiles, which were manufactured with different tool types for a comparison of the properties of the extruded profiles.
The observed difference of the weld-line in its hardness properties is reflected to the models using the reduced (by 15%) yield strength.
Following in the same footsteps, a more detailed approach should involve a detailed quantitative comparison based on the measured 3D anisotropic properties and their distributions over the extrudate sections.
Online since: June 2014
Authors: Hui Long Liu, Lei Jiang, Ge Lu, Zhi Ping Liu
Same uniform thermal physical properties are adopted for similar compatible material.
Some physical properties of 45# steel are listed in Table 1.
Considering the thermal image noise and the influence of site factors, when ANSYS is used to simulate, the standard should be improved to ensure that the simulated defects could be actually tested.
According to the temperature distribution curve reflected from the path, thermal properties of crack defects are on research.
Beijing: Mechanical Industry Press: 2008
Some physical properties of 45# steel are listed in Table 1.
Considering the thermal image noise and the influence of site factors, when ANSYS is used to simulate, the standard should be improved to ensure that the simulated defects could be actually tested.
According to the temperature distribution curve reflected from the path, thermal properties of crack defects are on research.
Beijing: Mechanical Industry Press: 2008
Online since: March 2011
Authors: Li Han, Martin Thornton, Douglas Boomer, M. Shergold
The long history of using RSW for steel can be attributed
to proven robustness and reliability, cost effectiveness and flexibility in production: supported by
the physical properties of steel being ideally matched to the process.
However, for aluminium the physical properties, such as high electrical and thermal conductivity, high thermal expansion, and tenacious surface oxide are all less well suited to the RSW process, as eloquently illustrated by Browne et al [7].
As a result of the challenges presented by the properties of aluminium, there have been no significant high-volume production vehicles that have utilized RSW as a primary structural joining technology for aluminium construction; though there are some notable low volume and sub assembly examples of the technology [2,8,9].
This doming behaviour affects energy dissipation during the test, and the changing geometry alters the loading conditions on the nugget.
These factors may account for some further displacement, but not major changes from the trends discussed.
However, for aluminium the physical properties, such as high electrical and thermal conductivity, high thermal expansion, and tenacious surface oxide are all less well suited to the RSW process, as eloquently illustrated by Browne et al [7].
As a result of the challenges presented by the properties of aluminium, there have been no significant high-volume production vehicles that have utilized RSW as a primary structural joining technology for aluminium construction; though there are some notable low volume and sub assembly examples of the technology [2,8,9].
This doming behaviour affects energy dissipation during the test, and the changing geometry alters the loading conditions on the nugget.
These factors may account for some further displacement, but not major changes from the trends discussed.
Online since: October 2011
Authors: Meng Du, Huai Yao, Guang Lin Zhu
With the development of industrial production, the requirement that materials with higher corrosion resistance, wear resistance, magnetic properties and hardness, chemical plating Ni-P alloys often can not meet the requirement.
The transition metal W is the preferred choice of the materials because of high melting temperature and unusual mechanical properties.
Many investigations have been reported on the effects of heating on the properties of electroless Ni-P deposits[8-10], but few of them have been reported concerning the behaviour of electroless Ni-W-P deposits and conflicting results on electroless Ni-W-P deposits are reported in literature[11].
Experimental procedure The H12 aluminium alloy was chosen as the substrate owing to its cost, convenience and basic mechanical strength.
The main factors which influence to hardness of coating had the crystal size, dislocation density and impurities.
The transition metal W is the preferred choice of the materials because of high melting temperature and unusual mechanical properties.
Many investigations have been reported on the effects of heating on the properties of electroless Ni-P deposits[8-10], but few of them have been reported concerning the behaviour of electroless Ni-W-P deposits and conflicting results on electroless Ni-W-P deposits are reported in literature[11].
Experimental procedure The H12 aluminium alloy was chosen as the substrate owing to its cost, convenience and basic mechanical strength.
The main factors which influence to hardness of coating had the crystal size, dislocation density and impurities.
Online since: April 2014
Authors: Xue Jun Xie
The selection of an optimal material is an important aspect of design for mechanical, electrical, thermal, chemical or other application.
Introduction Material selection is an important aspect of design for mechanical, electrical, thermal, chemical or other application, and it is critical for the success and competitiveness of the producers [1,2].
Improper selection of materials may result in damage or failure of an assembly and significantly decreases the performance of products, thus negatively affecting productivity, profitability and reputation of an organization[3].
Moreover, after normalizing the data, the applying coefficient of variation method not only covers target attribute, but also eliminates misleading effects of different scales in materials properties. the calculation formula of attribute weight is given as follows: , where , , and.
In this study, the attributes are dielectric strength (), volume resistance (), dissipation factor (), dielectric constant (), thermal expansion () and relative cost ().
Introduction Material selection is an important aspect of design for mechanical, electrical, thermal, chemical or other application, and it is critical for the success and competitiveness of the producers [1,2].
Improper selection of materials may result in damage or failure of an assembly and significantly decreases the performance of products, thus negatively affecting productivity, profitability and reputation of an organization[3].
Moreover, after normalizing the data, the applying coefficient of variation method not only covers target attribute, but also eliminates misleading effects of different scales in materials properties. the calculation formula of attribute weight is given as follows: , where , , and.
In this study, the attributes are dielectric strength (), volume resistance (), dissipation factor (), dielectric constant (), thermal expansion () and relative cost ().