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Online since: February 2021
Authors: Anatoly A. Popovich, Sergei D. Igoshin, Dmitriy V. Masaylo, Alexey V. Orlov
Unchangeable hardness of the substrate material may indicate that the effect of short heating up to 400 ˚ C and plus heating from laser heat during the cladding has not affected the basic mechanical properties of the substrate material after heating.
It is assumed that both these factors influence the development and formation of cracks simultaneously.
Gao, Study on microstructure, mechanical properties and machinability of efficiently additive manufactured AISI 316L stainless steel by high-power direct laser deposition, J.
Bojar, The microstructure, mechanical properties and corrosion resistance of 316L stainless steel fabricated using laser engineered net shaping, Mater.
Long, Mechanical properties of 304 austenite stainless steel manufactured by laser metal deposition, Mater.
Online since: September 2006
Authors: I. Altenberger, P. Juijerm, Ivan Nikitin, Berthold Scholtes
Introduction The main goal of mechanical surface treatments of metallic materials is the enhancement of fatigue properties.
Therefore it is the aim of this paper to examine which factors control the stability of macroscopic residual stresses in high temperature fatigued metallic materials.
Some of the most important factors such as temperature and stress amplitude are adressed in the following chapter.
For further details regarding the heat treatment and mechanical properties, refer to [9].
The effectiveness of any mechanical surface treatment of course depends on the combination of applied temperature and stress amplitude, since both directly affect the stability of resiadual stresses and work hardening.
Online since: February 2012
Authors: Guang Fu Liu, Hu Bing Zhu, Yu Lin Wang
Because of the special physical, chemical and optical properties, liquid crystal has widely been used in the light-thin display technology from the mid-twentieth century.
Influence of internal factors.
Influence of external factors.
It is generally believed that the solubility of supercritical CO2 fluid will be increased with the increment of the density of supercritical CO2 fluid, and the temperature and pressure are the main factors affecting the density of supercritical CO2 fluid.
The experimental results Number Pressure(MPa) Temperature(℃) Entrainer(%) Recovery(%) 1 8 35 3 60 2 10 40 3 70 3 12 45 4 78 4 14 50 4 82 5 16 55 5 90 6 18 60 5 83 From Table 2, it can be seen that the temperature, pressure and entrainer are the main factors affecting the recovery of the liquid crystal.
Online since: August 2010
Authors: Sriram Tammareddi, Qing Li
Nonlinear explicit finite element (FE) procedure is carried out using the Palmaz-Schatz stent geometry to quantitatively predict the effect of mechanical properties of these biomaterials on stent and coronary artery behavior during stent deployment.
The study is considered significant in understanding the role how stent materials affect biomechanical responses to the coronary stenting.
The mechanical properties of these metals are summarized in Table 1.
These three layers represent the intima, media and adventitia, each having distinct constitutive models to describe their biomechanical properties.
It is assumed that the three layers of the artery have equal thickness and are bound together as one composite, though having distinct mechanical properties.
Online since: January 2013
Authors: R. de Lieto Vollaro, A. Vallati
This depends on many factors: soil characteristics, moisture, installation mode etc.
In reality, however, the thermal resistance of the soil depends on many other factors.
Among the most important factors are the particle size characteristics, the lack of homogeneity and the water content.
The materials considered in the simulations had the following physical properties: Table 1 - Characteristics of the materials used in the simulations.
Thermal properties of soils.
Online since: October 2010
Authors: Shao Sheng Wei, De Hong Lu, Ming Zhou, Rong Zhou, Ye Hua Jiang
It is well known that refinement and spheroidization of the primary and eutectic Si in as-cast microstructure is the main way to improve their strength, ductility and machining properties.
Recently, the friction stir processing (FSP) is increasingly paid attention to due to its potential to modify the microstructure and improve properties of Al-Si castings [1].
Ma et al. [2-4] found that, in FSP to A356 alloy surface, coarse fibrous eutectic Si were intensely broken, the aspect ratio reduced, so mechanical properties, in particular the ductility and fatigue life were improvement.
Typical microstructure at the the microhardness of Al-30Si in the stir zones thermo-mechanical affected zone Discussions Effect of preheating temperature on size and morphology Si particle in stir zone.
The authors suggested that the Si spheroidization could be attributed to the knocking and friction between corners and sharp edges of Si particles with plastic flow of the matrix [8], which is found a common phenomenon in the thermo-mechanical affected zone (see Fig.6).
Online since: June 2017
Authors: Dae Yeon Kim, Tae Hee Kim, Choong Sun Lim, Bong Kuk Seo
The mechanical properties of the prepared resins without filler were measured with a universal testing machine (UTM).
The viscoelastic properties of the epoxy compositions were analyzed by dynamic mechanical analysis (DMA Q800, TA Instruments).
The mechanical properties of each composition were measured by UTM.
Maximum loss factors of MHHPA-C, and MTHPA-C are not as clear as that of NDA-C shown at 210.8°C in Fig. 6c and Table 4.
The mechanical and thermal properties of the prepared compositions were studied with DSC, DMA, and TMA.
Online since: September 2017
Authors: Marcelo A.S. Torres, D.H.S. Costa, C.A.R.P. Baptista, B.R.L. Silva, V. Pastoukhov
The results also showed how the negative part of the load affected the propagation rate of the crack, mainly for larger cracks and smaller loads.
It is assumed by many researchers that FCG rate is not affected by the compressive part of the cycle [1,2].
The mechanical properties of the material with 100 HV hardness are: Yield Stress 272 MPa, Tensile Strength 289 MPa, Elongation to Fracture 18% and Young`s Modulus 65 GPa.
This combination of factors suggests a faster fatigue crack propagation for the negative stress ratio, in accordance to the obtained experimental data.
Conclusion The negative load ratio affected the fatigue crack propagation rate for the AA 6005 aluminum alloy.
Online since: December 2022
Authors: Shuai Ren, Xiao Hua Lv, Guo Feng Liu, Xiao Yuan Zhang
The experimental results show that the hydrophobicity of the contamination layer is affected by temperature.
Lu, Dust contamination on surface of transmission line insulators in air-polluted regions in China: statistical characteristics, adhesion mechanism, and environmental impact factors, Environmental Science and Pollution Research. 27(19) (2020) 23643-23654
Nekahi, Properties and applications of superhydrophobic coatings in high voltage outdoor insulation: A review, IEEE Transactions on Dielectrics and Electrical Insulation. 24(6) (2017) 3630-3646
Xie, Constructing non-fluorinated porous superhydrophobic SiO2-based films with robust mechanical properties, Colloids and Surfaces A: Physicochemical and Engineering Aspects. 551 (2018) 65-73
Wang, Impact of surface discharge on pollution layer of silicone rubber insulator, 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). (2015) 472-475
Online since: September 2013
Authors: Jian Zhang, Dong Lai Zhang
Changing the structure parameters and material properties of MCM would directly changes the thermal load distribution of the whole structure, thereby affecting the chip junction temperature.
Therefore thermal management of MCM, reasonable design of the structure of MCM and analysis of the structure parameters or material properties are benefit to guide the thermal design of MCM.
The parametric study shows the variation in package thermal resistance due to different thermal grease thicknesses and different chip-lid thermal interface material (TIM) properties [14].
And [19] analyzes the effects of factors such as thermal conductivity and interfacial thermal resistance of the thermal interface materials, solder bump patterns, solder ball patterns, thickness of the chips, the spacing between chips, flow velocity and liquid inlet temperature on the thermal performance of MCM.
Table 1 Structure parameters and material properties of MCM It is air natural convection cooling in the MCM module, the surrounding air temperature is 25℃.
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