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Online since: September 2023
Authors: A. Karpagaraj, D. Vinoth Kumar, S. Gejendhiran
Fundamental investigation of mechanical properties on different types of dissimilar welded joints was described in this paper.
Anandaraj et al., examined the influence of process factors on rotary friction welding of two different metals, IN 718 and AISI 410.
The effect of microstructure and mechanical properties are also studied.
Investigation on mechanical and metallurgical properties of rotary friction welded In718/SS410 dissimilar materials.
Microstructure evolution and mechanical properties of the dissimilar joint between IN718 and STS304.
Anandaraj et al., examined the influence of process factors on rotary friction welding of two different metals, IN 718 and AISI 410.
The effect of microstructure and mechanical properties are also studied.
Investigation on mechanical and metallurgical properties of rotary friction welded In718/SS410 dissimilar materials.
Microstructure evolution and mechanical properties of the dissimilar joint between IN718 and STS304.
Online since: May 2015
Authors: Dao Heng Sun, Ling Yun Wang, Zhan Zhan, Xiao Hui Du, Ru Hai Zhou, Hao Er Zhang, Wen Long Lü
Study of PSG Thickness Uniformity Influencing Factors in LPCVD
Wenlong Lü1,2,a, Zhan Zhan2,b,Xiaohui Du2,c,Ruhai Zhou2,d,
Haoer Zhang2,e, Lingyun Wang2,f,Daoheng Sun2,g*
1Micro-Electro-Mechanical Systems Research Center, Xiamen University, Xiamen,Fujian, China
2Department of Mechanical and Electrical Engineering, Xiamen University, Xiamen,Fujian, China
alwl1980@xmu.edu.cn,bzhanzhan_snow@163.com,c772745108@qq.com,d345325749@qq.com,
e693406356@qq.com,frabitwangly@yahoo.com.cn,gsundh@xmu.edu.cn
Keywords: LPCVD; PSG thickness uniformity; Surface velocity uniformity; Flow distribution
Abstract.In the fabrication of SiC high-temperature sensors, the phosphosilicate glass film (PSG) is deposited on the SiC wafer as the intermediate layer, achieving the bonding of two SiC wafers.
The ease of bonding is affected by the PSG film thickness uniformity.
While to some extent, the PSG thickness uniformity will affect the subsequent bonding process.
LPCVD has a series of advantages over APCVD and PECVD in quality, thickness uniformity and mechanical property of the deposited film[2,3].
In fact, the direct flux is not completely isotropic and the supplementary reacting gas flow will also affect the thickness uniformity of deposited film.
The ease of bonding is affected by the PSG film thickness uniformity.
While to some extent, the PSG thickness uniformity will affect the subsequent bonding process.
LPCVD has a series of advantages over APCVD and PECVD in quality, thickness uniformity and mechanical property of the deposited film[2,3].
In fact, the direct flux is not completely isotropic and the supplementary reacting gas flow will also affect the thickness uniformity of deposited film.
Online since: February 2019
Authors: M.Z. Zaripov, Ayrat Minnulovich Faнrushin, D.V. Karetnikov
Apply various ways of heat treatment to improvement of mechanical properties of welded connections and increase in a resource of work.
The structure shows considerable crushing of metal: mechanical properties improve, the physical density of metal considerably increases.
However in the course of welding more than 1 mm lead use of amplitude of vibration to decrease in mechanical properties of metal of a seam, formation of cracks, a time and other defects.
At the same time with increase in frequency of vibration influence, there is a smoothing of curves of microhardness that demonstrates decrease in heterogeneity of mechanical properties on width of welded connection.
Karetnikov, Technological capabilities improve weld metal Mechanical properties of steel 09Mn2Si, Zapiski Gornogo instituta. 209 (2014) 104-108.
The structure shows considerable crushing of metal: mechanical properties improve, the physical density of metal considerably increases.
However in the course of welding more than 1 mm lead use of amplitude of vibration to decrease in mechanical properties of metal of a seam, formation of cracks, a time and other defects.
At the same time with increase in frequency of vibration influence, there is a smoothing of curves of microhardness that demonstrates decrease in heterogeneity of mechanical properties on width of welded connection.
Karetnikov, Technological capabilities improve weld metal Mechanical properties of steel 09Mn2Si, Zapiski Gornogo instituta. 209 (2014) 104-108.
Online since: May 2013
Authors: S.A. Syed Azuan, M.M. Saufi, M.G. Azniah, J.M. Juraidi
From the analysis, there is a significant effect of vacuum pressure on the tensile properties.
Since F*= 166.80 > F0.01;5;84 = 3.26, we reject the null hypothesis and conclude that increasing the vacuum pressure significantly affects the tensile properties of sugar palm frond fibre reinforced polyester composites.
One way ANOVA test for tensile test Source DF SS MS F P Factor 5 18902799 3780560 166.80 0.000 Error 84 1903825 22665 Total 89 20806623 However, the ANOVA does not tell as which level of vacuum pressure result in increased tensile properties of the sugar frond fibres.
It is also found that the alignment of fibre, intersection between fibre and matrix, bubbles arise during the fabrication of the panel and fibre dispersion can affect the tensile properties of the natural fibre reinforced composite.
Imra, Vacuum effect on improvement of mechanical properties of coir fiber reinforced composites, Teknika, 2(2011) 20 – 25.
Since F*= 166.80 > F0.01;5;84 = 3.26, we reject the null hypothesis and conclude that increasing the vacuum pressure significantly affects the tensile properties of sugar palm frond fibre reinforced polyester composites.
One way ANOVA test for tensile test Source DF SS MS F P Factor 5 18902799 3780560 166.80 0.000 Error 84 1903825 22665 Total 89 20806623 However, the ANOVA does not tell as which level of vacuum pressure result in increased tensile properties of the sugar frond fibres.
It is also found that the alignment of fibre, intersection between fibre and matrix, bubbles arise during the fabrication of the panel and fibre dispersion can affect the tensile properties of the natural fibre reinforced composite.
Imra, Vacuum effect on improvement of mechanical properties of coir fiber reinforced composites, Teknika, 2(2011) 20 – 25.
Online since: July 2020
Authors: Hao Zhu, Shao Kang Dong, Ze Ming Ma, Jun Wang
It is necessary to propose a reasonable explanation about how precipitates affect the mechanical properties of 7075 aluminum alloy FSW joint.
Therefore, the categories of precipitated phases may be the main factor affecting the microhardness of the FSW joint.
Factors affecting microhardness include grain size, strain hardening and the size of the precipitated phase.
Mechanical properties evolution during post-welding-heat treatments of double-lap Friction Stir Welded joints [J].
Microstructure and mechanical properties of friction stir welded AA7075-T651 aluminum alloy thick plates [J].
Therefore, the categories of precipitated phases may be the main factor affecting the microhardness of the FSW joint.
Factors affecting microhardness include grain size, strain hardening and the size of the precipitated phase.
Mechanical properties evolution during post-welding-heat treatments of double-lap Friction Stir Welded joints [J].
Microstructure and mechanical properties of friction stir welded AA7075-T651 aluminum alloy thick plates [J].
Online since: August 2013
Authors: Yuan Yuan Li, Shang Ping Bai, Dong Dong You, Jia Huan Zhao
Changes of the clearance between punch and chamber resulting from thermal-mechanical loading effects affect the injection process of squeeze casting greatly.
Introduction The mechanical properties of squeeze casting parts are good enough to approach or reach the level of the same alloy forging parts’[1,2].
Injection system model Material properties of casting, punch and chamber.
Their material properties are shown in Table 1 [9].
Dynamic clearance in both cases Conclusions (1) The sizes of the punch and the chamber both increase under the influence of heat and load factors.
Introduction The mechanical properties of squeeze casting parts are good enough to approach or reach the level of the same alloy forging parts’[1,2].
Injection system model Material properties of casting, punch and chamber.
Their material properties are shown in Table 1 [9].
Dynamic clearance in both cases Conclusions (1) The sizes of the punch and the chamber both increase under the influence of heat and load factors.
Online since: February 2022
Authors: S. Yu. Syanov
Engineering Quality Support of the Surface Layer and Operational Properties of Machine Parts during the Process of Electroerosion
S.Yu.
Introduction The quality and reliability of products and, as a result, their service life is determined by their operational properties.
Technological support of the operational properties of the products will reduce the cost of their manufacture and repair, as well as provide a target life.
This leads to the removal of the material of the workpiece, due to which the geometric parameters of the quality of the surface layer are formed, as well as to the heating and cooling of thin surface layers at high speeds, which leads to a change in the physical and mechanical properties of the processed of the workpiece.
These factors will have a different effect when using various schemes of shaping parts.
Introduction The quality and reliability of products and, as a result, their service life is determined by their operational properties.
Technological support of the operational properties of the products will reduce the cost of their manufacture and repair, as well as provide a target life.
This leads to the removal of the material of the workpiece, due to which the geometric parameters of the quality of the surface layer are formed, as well as to the heating and cooling of thin surface layers at high speeds, which leads to a change in the physical and mechanical properties of the processed of the workpiece.
These factors will have a different effect when using various schemes of shaping parts.
Online since: September 2022
Authors: Farid Rouabah, Brahim Barka, Fairouz Zouaoui, Magali Fois, Yacine Nouar, Abdeslam Bencid
It is applied in various fields due to its versatile thermophysical, mechanical and optical properties.
The results obtained show that a correlation between the mechanical and thermophysical properties and the quenching temperature has been established.
In addition, it was found that while the quenching process above Tg did not affect the thermophysical properties, quenching below Tg affected it very markedly in the temperature range corresponding to the secondary relaxation mode.
McQuarrie, Thermal Conductivity: I, Concepts of Measurement and Factors Affecting Thermal Conductivity of Ceramic Materials, Journal of the American Ceramic Society. 37 (1954) 67-72. https:// doi.org/10.1111/j.1551-2916.1954.tb20100.x. [5] R.
Haddaoui, Mechanical and thermal properties of polycarbonate, part 1: Influence of free quenching.
The results obtained show that a correlation between the mechanical and thermophysical properties and the quenching temperature has been established.
In addition, it was found that while the quenching process above Tg did not affect the thermophysical properties, quenching below Tg affected it very markedly in the temperature range corresponding to the secondary relaxation mode.
McQuarrie, Thermal Conductivity: I, Concepts of Measurement and Factors Affecting Thermal Conductivity of Ceramic Materials, Journal of the American Ceramic Society. 37 (1954) 67-72. https:// doi.org/10.1111/j.1551-2916.1954.tb20100.x. [5] R.
Haddaoui, Mechanical and thermal properties of polycarbonate, part 1: Influence of free quenching.
Online since: November 2011
Authors: A.R. Hemdi, M.Z.M. Saman, Norhayati Zakuan
Critical Success Factors of Green Design Implementation for Malaysia Automotive Industry
Zakuan, N.1 Saman, M.Z.M.2 and Hemdi, A.R. 3
1Fac. of Management and Human Resources Development, Universiti Teknologi Malaysia (UTM), Johor, Malaysia.
2Faculty of Mechanical Engineering, Universiti Teknologi Malaysia (UTM), Johor
3Faculty of Mechanical Engineering, Universiti Teknologi Mara (UiTM), Penang
e-mail: zameri@fkm.utm.my
Keywords: Green design concept, Malaysia automotive industries, Confirmatory factor analysis, Critical factors
Abstract.
The critical factors will be examined empirically via confirmatory factor analysis.
In this process, recyclability and recoverability rates depends on the design and materials properties of vehicles.
The results consistently supported the factor structure for Green Design Concept with five factors.
An instrument for measuring the critical factors of quality management.
The critical factors will be examined empirically via confirmatory factor analysis.
In this process, recyclability and recoverability rates depends on the design and materials properties of vehicles.
The results consistently supported the factor structure for Green Design Concept with five factors.
An instrument for measuring the critical factors of quality management.
Online since: April 2010
Authors: Jie Mo Tian, Li Min Dong, Yuan Fu Yi, Hong Chen Liu, Bin Deng, Ning Wen, Wei Wei Zhang, Long Quan Shao, Jie Liu
As for sintering process, the sintering temperature, the temperature
rise speed and holding time are all vital factors to the ceramic preparation.
AGC Mechanical properties test.
The physical and mechanical properties of the AGC are shown in Table 1.
With Alumina pre-sintering temperature and rise speed increase, mechanical properties of porous alumina are improved accordingly.
The increase of temperature velocity helps to improve physical and mechanical properties of AGC.
AGC Mechanical properties test.
The physical and mechanical properties of the AGC are shown in Table 1.
With Alumina pre-sintering temperature and rise speed increase, mechanical properties of porous alumina are improved accordingly.
The increase of temperature velocity helps to improve physical and mechanical properties of AGC.