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Online since: May 2006
Authors: Joao P. Nobre, António Castanhola Batista, Carlos Capela, Marcelo Calvete Gaspar
For an assessment of the global surface integrity, the final surface roughness and residual stress state are, obviously, two important factors.
The final residual stress state and surface roughness of the machined components are decisive factors for the optimization of the machining operations.
Table 1 presents the mechanical properties and chemical composition of the HSM finished mould steel.
Table 1 - HSM finished mould steel, mechanical properties and chemical composition Steel σσσσy0.2 σσσσm εεεεr Chemical Composition [% weight] DIN [MPa] [MPa] [%] [HV] C Si Mn Cr Others X36 CrMo17 940 1150 8 320 0.33 0.35 1.35 16.7 0.12 The grinded surface was considered as a reference surface in order to evaluate the HSM performance compared to this traditional finishing technique.
It is visible a similar evolution of both factors.
Online since: August 2018
Authors: Shu Wang Duo, Hao Zhang, Wei Jie Chang, Ying Ying Chen, Jun Li, Peng Zhan Jiang, Xue Wen Fan, Xue Zhang
Other researchers suggested that combination CrN and Si in a multilayer can obtain better mechanical properties.
The mechanical properties of the CrSiN coatings.
What’s more, the amorphous Si3N4 formed in the coatings can also make it has advanced mechanical properties.
Combined Fig.4 with Fig.5, the coating with Si 16.28% exhibited excellent mechanical properties.
Munroe, Factors governing the mechanical behaviour of CrSiN coatings: Combined nanoindentation testing and transmission electron microscopy [J].
Online since: August 2010
Authors: Ping Hao Zhang, Cheng Zhong Gu, Xin Yue Wu
In recent years, Chinese scholars have done some research about properties and application of metal rubber material.
It is impossible to research the damping properties of metal rubber material only from a theoretical point of view, and the application of some theoretical model is limited.
There are many factors affect the characteristics of metal rubber material, such as material, wire diameter, screw intermediate diameter, screw distribution, the relative density, molding technique and so on.
In this paper, experiment research focuses on the relative density effect on the properties of Metal Rubber.
China Mechanical Engineering, 2002, 13(21): 1801-1804
Online since: November 2025
Authors: Zhao Xu Fu, Jian Kun Wang, Lai Zheng Luo, Fang Chao Zhao, Jian Hong Liu, Yan Ru He, Hu Tao
Thermal Properties.
The properties of fibers and the bonding properties between fibers and resins are the key factors to determine the bending properties of composites[17].
Effect of chopped basalt fiber on mechanical properties of concrete[J].
Effect of chopped basalt fiber on mechanical properties of concrete[J].
Mechanical properties of basalt fiber with surface modification reinforced epoxy resin composite[J].
Online since: July 2011
Authors: Shu Tao Huang, Xiao Lin Yu, Li Zhou
Introduction SiCp/Al composites have many outstanding properties, such as high specific stiffness/strength, high wear resistance, low density, high thermal conductivity and low thermal expansion.
Because of their superior properties, they are widely used in aerospace, automotive, electronics and medical industries.
Although the mechanical properties of the composites have been significantly improved, with the introduction of ceramic particles, they show high hardness and leads to severe abrasive wear on the conventional tools like high- speed steel and carbide tools, and the diamond tools are considered the most cost-effective and by far the best choice for the machining of SiCp/Al composites[1,2].
From the available literature on SiCp/Al composites, it is clear that the morphology, distribution and volume fraction of the reinforcement phase, as well as the matrix material properties are all factors that affect the overall cutting process.
During experiments, only one of the parameters, such as the table speed was varied while the cutting depth was held constant to observe the effects of individual parameter on machining properties.
Online since: July 2014
Authors: Ling Xu, Xiang Yu, Zhen Yu Di
Introduction In the process of the buildings’ long-term use, as time goes on, the security failure will occur or enter into the period of functional degradation in the case of internal or external, artificial or natural and other factors, which is an irreversible process.
Especially the reinforced concrete beams in the long process of using, which will lead to unfavorable factors, which including deterioration of performance, decreased carrying capacity, stability and durability.
In order to study the destroyed concrete beams which are reinforced by the CFRP of mechanical properties, mainly including the measured carrying capacity, the mid span section of concrete strain, crack deflection and crack the case at each level of loading and other indicators.
Conclusions The test results conducted by the general reinforced concrete beams reinforced through the CFRP testing and destructive testing of reinforced concrete beams reinforced after the results of comparative analysis can draw the following conclusions: Pasted with CFRP reinforced damaged reinforced concrete beams , not only can restore the original structure’s carrying capacity, but also can improve the carrying capacity of the mechanical properties of the original structure , making the carrying capacity increasing significantly.
Pasting affect the quality of CFRP fracture mode directly while observing during the test, while reinforced construction, we must ensure the quality of CFRP full immersed and pasted in order to make it overall play.
Online since: October 2010
Authors: Xiao Jun Bai, Qiang Ru, Ping Jun Tao, Yuan Zheng Yang, Zhi Wei Xie
Introduction Bulk metallic glasses (BMGs) are potential future structure materials due to their superior mechanical properties, such as high strength, high hardness, large elastic deformation limit, good corrosion resistance, etc [1, 2].
Just like other mechanical properties, the friction and wear properties of the BMGs are also vital factors when the BMGs are serving in some engineering applications [3].
In present paper, the plate-like Zr55Cu30Ni5Al10 BMG was prepared again, meanwhile, the sliding friction and wear behavior of the BMG was studied and correlations between wear resistance and mechanical properties were discussed.
However, the fluctuation range of frictional coefficient changes little and the corresponding frictional coefficient grows slowly, indicating that the anti-friction properties of the BMG have a very good stability.
Conclusions Load significantly affects the friction and wear behavior of the Zr55Cu30Ni5Al10 BMG.
Online since: September 2013
Authors: Rajendaran Vairavan, Ong Tee Say, Phaklen Ehkan, Vithyacharan Retnasamy, Fairul Afzal Ahmad Fuad, Zaliman Sauli
Improvement in small size and mechanical, electronic and functionality achievement is needed with the growth of telecommunications industry.
Solder alloy materials have high melting points thus making their mechanical properties to be less affected by temperature.
The material properties for the Sn-3.9Ag-0.6Cu solder alloy that satisfies the BISO model is listed in Table 3.A single ball 3-dimensional elastic-plastic model were used to examine the effects of shear speed with fixed shear height on the failure behavior of the single solder joint ball.
Table 2 .Linear Elastic Material Properties For BGA Assemblies Materials Young’s modulus (GPa) Poisson’s ratio Density (kg/m3) Sn-3.9Ag-0.6Cu 52 0.35 7500 Cu 117 0.34 8900 FR4 172 0.39 1900 Fig1.
Thus, this concludes that increase in shear force by increasing the shear speed is an absolute outcome of the solder material properties such as time-independent plastic hardening and time-dependent strain-rate sensitivity.
Online since: November 2012
Authors: Yeau Ren Jeng
These approaches were used to studies the defect effect on the mechanical properties of thin film, mechanical properties of nanotubes, and tribological phenomena at nano-scale interfaces.
Hence the study is aimed to investigate the interfacial behavior and mechanical properties of nano-materials.
In addition, Minot et al. [33] found that the mechanical and electrical properties of the nanotubes were affected by contact deformation via nanoindentation techniques.
Baohe, Mechanical and physical properties on carbon nanotube, J.
Gillespie, Mechanical properties of vapor-grown carbon fiber, Carbon 33 (1995) 1217-1221.
Online since: January 2013
Authors: S. Sulaiman, M.K.A.M. Ariffin, T.S. Hong, N.A. Mustafa
Boric acid (H3BO3) is one of the most popular solid lubricants and has excellent lubrication properties without calling for expensive disposal techniques [4].
Boric Acid (H3BO3) is one of the most popular solid lubricants and has excellent lubrication properties without calling for expensive disposal techniques.
Several studies related to the lubrication properties of boric acid are carried out over the past several decades [12].
It is because there are some factors can influence the surface roughness during machining like tool geometry and process parameters.
The decrease in surface roughness due to boric acid can be atrributed due to the inherent lubricating properties even at high temperatures [4].
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