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Online since: January 2010
Authors: Sheng Bao Wang, Zhen Huang, Jun Feng Su
Thus, there is a need for a simplified method to evaluate piled mechanical properties of
microPCMs.
Mechanical Properties Measurements.
The microPCMs property of compact is a focus factor to use in building material.
Obviously, the factors of the mass ratio of core and shell, the average diameter and mass of emulsifying agent affect the thickness of shell, also obtain different penetration property.
But mechanical properties of double-shell samples did not change much comparing to each other.
Mechanical Properties Measurements.
The microPCMs property of compact is a focus factor to use in building material.
Obviously, the factors of the mass ratio of core and shell, the average diameter and mass of emulsifying agent affect the thickness of shell, also obtain different penetration property.
But mechanical properties of double-shell samples did not change much comparing to each other.
Online since: March 2017
Authors: Břetislav Skrbek, Zuzana Andrsova, Pavel Kejzlar, Martin Švec
Austempered vermicular-graphite iron seems to be a perspective material because of its promising mechanical properties.
These properties are strongly affected by parameters of applied heat treatment.
The difference in the length of the austenitizing times that affects the saturation of austenite by carbon from graphite particles (here 30 and 90 minutes) had not any influence (or not significant) on mechanical properties or structure.
Table 2 Properties of AVGI.
The resulting mechanical properties are strongly affected by the heat treatment parameters.
These properties are strongly affected by parameters of applied heat treatment.
The difference in the length of the austenitizing times that affects the saturation of austenite by carbon from graphite particles (here 30 and 90 minutes) had not any influence (or not significant) on mechanical properties or structure.
Table 2 Properties of AVGI.
The resulting mechanical properties are strongly affected by the heat treatment parameters.
Online since: July 2014
Authors: Sandeep V. Raut, T.P. Singh, Vijaykumar S. Jatti
Influence of Built Orientation on Mechanical Properties in Fused Deposition Modeling
Sandeep V.
In FDM, one of the critical factor is to select the built up orientation of the model since it affects the different areas of the model like main material, support material, built up time, total cost per part and most important the mechanical properties of the part.
In view of this, objective of the present study was to investigate the effect of the built-up orientation on the mechanical properties and total cost of the FDM parts.
In order to be used as a part for serial production, the components must possess the required mechanical properties.
In this they fabricated the model at different orientation varying from 0° to 90°, due to which the variation occurred in other factors like number of layers, built time, built material and support material which directly affects the manufacturing cost has been studied.
In FDM, one of the critical factor is to select the built up orientation of the model since it affects the different areas of the model like main material, support material, built up time, total cost per part and most important the mechanical properties of the part.
In view of this, objective of the present study was to investigate the effect of the built-up orientation on the mechanical properties and total cost of the FDM parts.
In order to be used as a part for serial production, the components must possess the required mechanical properties.
In this they fabricated the model at different orientation varying from 0° to 90°, due to which the variation occurred in other factors like number of layers, built time, built material and support material which directly affects the manufacturing cost has been studied.
Online since: October 2014
Authors: Wen Qing Qu, Xin Wen Chen, Qun Bo Lv, Yang Yang Liu, Wei Yan Li, Dan Dan Zhang
Whereas there are some visible interface defects to affect the mechanical property and engineering application of FSW overlapped structures.
Meanwhile, the study can improve the mechanical properties and weld quality.
The influences of tool rotational speed and travel speed on joint mechanical properties were also investigated, in terms of hardness, tensile and fatigue properties.
And the two critical factors influencing the tensile strength of overlapped joints are the EST of the material and the sheet interface sharpness.
Factors affected the properties of friction stir welded aluminum lap joints.
Meanwhile, the study can improve the mechanical properties and weld quality.
The influences of tool rotational speed and travel speed on joint mechanical properties were also investigated, in terms of hardness, tensile and fatigue properties.
And the two critical factors influencing the tensile strength of overlapped joints are the EST of the material and the sheet interface sharpness.
Factors affected the properties of friction stir welded aluminum lap joints.
Online since: August 2012
Authors: I. Siva, J.T. Winowlin Jappes, N. Rajini, Rajakarunakaran S
In Taguchi design of experiments, L9 orthogonal array was employed to investigate the effect of control factors on mechanical properties such as tensile and flexural strength.
Based on the literature and preliminary works, the following control factors were identified as key factors which affect the dispersion of nanocomposite.
Table 3: Contribution ratio for Tensile Strength Mechanical Properties Factors Mixing Speed (S) Mixing Hour (T) Blade design (B) Wt % of clay (C) Tensile Strength (MPa) Contribution Ratio (%) 17.13 11.37 44.98 26.52 Cumulative Contribution Ratio (%) 17.13 28.50 73.48 100 From this table, Blade design, % of Clay and Mixing speeds are identified as significant factors affecting tensile strength.
From this table, blade design, % of Clay and mixing speeds are identified as significant factors affecting flexural strength.
The blade design was identified as the main control factor to improve the properties.
Based on the literature and preliminary works, the following control factors were identified as key factors which affect the dispersion of nanocomposite.
Table 3: Contribution ratio for Tensile Strength Mechanical Properties Factors Mixing Speed (S) Mixing Hour (T) Blade design (B) Wt % of clay (C) Tensile Strength (MPa) Contribution Ratio (%) 17.13 11.37 44.98 26.52 Cumulative Contribution Ratio (%) 17.13 28.50 73.48 100 From this table, Blade design, % of Clay and Mixing speeds are identified as significant factors affecting tensile strength.
From this table, blade design, % of Clay and mixing speeds are identified as significant factors affecting flexural strength.
The blade design was identified as the main control factor to improve the properties.
Online since: August 2008
Authors: N. Duangphattra, C. Aramphongphun
A Study of the Effects of Processing Conditions on Mechanical
Properties of Polypropylene/Multiwall Carbon Nanotube
Nanocomposites Using Design of Experiments
N.
This research work studies the effects of processing conditions on mechanical properties of polymer nanocomposites.
Therefore, the mechanical properties were improved significantly with the content of MWCNTs.
In addition, morphology also shows the result of the dispersion of MWCNTs in the nanocomposite that affects the mechanical properties.
According to Table 2, there is strong evidence that factors (a), (b), (c) and (d) affect the mechanical properties of the nanocomposite (p-value < 0.01, significance level = 0.05).
This research work studies the effects of processing conditions on mechanical properties of polymer nanocomposites.
Therefore, the mechanical properties were improved significantly with the content of MWCNTs.
In addition, morphology also shows the result of the dispersion of MWCNTs in the nanocomposite that affects the mechanical properties.
According to Table 2, there is strong evidence that factors (a), (b), (c) and (d) affect the mechanical properties of the nanocomposite (p-value < 0.01, significance level = 0.05).
Online since: September 2015
Authors: Pal Dinesh Kumar, Abhishek Upadhyay, Arun Agarwal, Sandeep Kumar
Joining of Molybdenum and Kovar is difficult because of difference in their physical and mechanical properties.
Various parameters affecting the vacuum brazing process and factors affecting joint strength are discussed.
Factors affecting the joint strength of brazed joints like external compressive weight, diffusion of filler material into the parent materials, surface roughness of parent materials, surface flatness have been discussed.
Brazing is a technique successfully used for joining metals with large difference in their melting points and mechanical properties.
Apart from the braze filler thickness , other factors affecting joint strength are surface roughness of parent materials, flatness of surfaces to be brazed, effect of external dead weight over the brazing assembly and joint design.
Various parameters affecting the vacuum brazing process and factors affecting joint strength are discussed.
Factors affecting the joint strength of brazed joints like external compressive weight, diffusion of filler material into the parent materials, surface roughness of parent materials, surface flatness have been discussed.
Brazing is a technique successfully used for joining metals with large difference in their melting points and mechanical properties.
Apart from the braze filler thickness , other factors affecting joint strength are surface roughness of parent materials, flatness of surfaces to be brazed, effect of external dead weight over the brazing assembly and joint design.
Online since: June 2022
Authors: Niyou Wang, Senthil Kumar Anantharajan, S. Thameem Dheen, Jerry Ying Hsi Fuh
The pore size, strut thickness, and internal structure of the bone implant are vital factors affecting mechanical strength and Young's modulus.
The deviations can be caused by many factors, such as the inaccurate dimension of the actual printed sample and imperfect pore shape, which affect the mass, volume, and ultimately the actual sample's density.
Such deviations can cause a substantial reduction in the mechanical properties of the actual printed sample and affect the osseointegration of the implant [12].
The directional microstructures may cause anisotropic mechanical properties.
The difference in the pore size and overall size may also affect the actual mechanical properties.
The deviations can be caused by many factors, such as the inaccurate dimension of the actual printed sample and imperfect pore shape, which affect the mass, volume, and ultimately the actual sample's density.
Such deviations can cause a substantial reduction in the mechanical properties of the actual printed sample and affect the osseointegration of the implant [12].
The directional microstructures may cause anisotropic mechanical properties.
The difference in the pore size and overall size may also affect the actual mechanical properties.
Online since: January 2014
Authors: Cheng Biao Wang, Wen Yue, Song Sheng Lin, Zhi Qiang Fu, Yi Ren
Influence of Pulsed Gas Feeding on Surface Defects and Mechanical Properties of Ti/TiN Multilayered Films deposited by Ion Beam Assisted Magnetron Sputtering
FU Zhiqiang1, a, REN Yi1, WANG Chengbiao1, YUE Wen1, and LIN Songsheng2
1 School of Engineering and Technology, China University of Geosciences, Beijing 100083, China
2 Guangzhou Research Institute of Non-ferrous Metals, Guangzhou 510651, China
a fuzq@cugb.edu.cn
Keywords: Ti/TiN multilayered films; ion beam assisted magnetron spputtering; pulsed gas feeding; surface defect; mechanical properties.
It was found that the key factors affecting surface defects of monolayer TiN films are sputtering power and N2 flow rate while ion current is the most significant factor affecting the hardness of monolayer TiN films.
Table 4 Effect of various factors on LC of TiN films Factors SⅠ SⅡ SⅢ R Optimal A 2.83 9.07 8.33 6.24 7-9 kW B 9.63 5.43 5.17 4.46 20 sccm C 8.00 5.97 6.27 2.03 4 A D 8.27 6.00 5.97 2.30 150 ℃ Table 3 Effect of various factors on AD of TiN films Factors SⅠ SⅡ SⅢ R Optimal A 3.09 3.45 2.23 1.22 9 kW B 2.32 2.63 3.82 1.50 20 sccm C 2.77 2.81 3.19 0.42 4 A D 2.48 2.61 3.68 1.20 150 ℃ The effect of various factors on LC of TiN films is shown in Table 4.
Table 5 Effect of various factors on HV of TiN films Factors SⅠ SⅡ SⅢ R Optimal A 1783 2218 2272 489 9 kW B 1999 2026 2247 221 50 sccm C 2460 2109 1704 756 4 A D 2322 2117 1834 488 150 ℃ The effect of various factors on HV of TiN films is shown in Table 5.
Conclusions The key factors affecting the monolayer TiN films deposited by ion beam assisted magnetron sputtering are sputtering power and N2 flow rate while ion current is the most significant factor for the hardness of the monolayer TiN films.
It was found that the key factors affecting surface defects of monolayer TiN films are sputtering power and N2 flow rate while ion current is the most significant factor affecting the hardness of monolayer TiN films.
Table 4 Effect of various factors on LC of TiN films Factors SⅠ SⅡ SⅢ R Optimal A 2.83 9.07 8.33 6.24 7-9 kW B 9.63 5.43 5.17 4.46 20 sccm C 8.00 5.97 6.27 2.03 4 A D 8.27 6.00 5.97 2.30 150 ℃ Table 3 Effect of various factors on AD of TiN films Factors SⅠ SⅡ SⅢ R Optimal A 3.09 3.45 2.23 1.22 9 kW B 2.32 2.63 3.82 1.50 20 sccm C 2.77 2.81 3.19 0.42 4 A D 2.48 2.61 3.68 1.20 150 ℃ The effect of various factors on LC of TiN films is shown in Table 4.
Table 5 Effect of various factors on HV of TiN films Factors SⅠ SⅡ SⅢ R Optimal A 1783 2218 2272 489 9 kW B 1999 2026 2247 221 50 sccm C 2460 2109 1704 756 4 A D 2322 2117 1834 488 150 ℃ The effect of various factors on HV of TiN films is shown in Table 5.
Conclusions The key factors affecting the monolayer TiN films deposited by ion beam assisted magnetron sputtering are sputtering power and N2 flow rate while ion current is the most significant factor for the hardness of the monolayer TiN films.
Online since: January 2015
Authors: Li Jing Yan
Cooling is very important in the process of hot stamping process of a link, directly affect the mechanical properties and service life of the forming parts.
This paper deeply analyzes the hot stamping process and heat transfer theory, summarizes the main factors affecting mold cooling system performance.
A rapid and uniform cooling is an important index of measuring mold cooling system is reasonable, the ideal cooling system can not only improve the efficiency of production, is also the key to improve the mechanical properties and dimension precision.
This study was based on the basic theory of heat transfer, analyses the factors that affect the cooling effect.
The analysis found: the velocity of flow, pipe spacing, the pipe diameter is the main factor affecting the mold cooling effect, this paper uses the FLUENT fluid analysis software of cooling process of U shaped parts of analysis, simulation of temperature field change state.
This paper deeply analyzes the hot stamping process and heat transfer theory, summarizes the main factors affecting mold cooling system performance.
A rapid and uniform cooling is an important index of measuring mold cooling system is reasonable, the ideal cooling system can not only improve the efficiency of production, is also the key to improve the mechanical properties and dimension precision.
This study was based on the basic theory of heat transfer, analyses the factors that affect the cooling effect.
The analysis found: the velocity of flow, pipe spacing, the pipe diameter is the main factor affecting the mold cooling effect, this paper uses the FLUENT fluid analysis software of cooling process of U shaped parts of analysis, simulation of temperature field change state.