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Online since: September 2013
Authors: Chanchana Thanachayanont, Chabaiporn Junin, Tossapol Tippo, Apinunt Thanachayanont, Micheal Hietschold, Seeroong Prichanont
Good dielectric properties were obtained on glass and PEN at film thicknesses of 95 nm.
Defects in the dielectric layer can influence its electrical properties.
Dissolving PMMA in dimethylformamide (DMF) solution has produced films with high-quality mechanical and physical properties [4].
Salerno, Solvent effects on the thermal and mechanical properties of poly(methyl methacrylate) casted from concentrated solutions, Adv.
Gorman, The influence of solvent quality on the mechanical properties of thin cast isotactic poly(methyl methacrylate) coatings, J.
Online since: May 2014
Authors: Beatriz López, J.M. Rodriguez-Ibabe, N. Gonzalez, M.C. Revilla
A proper balance of these two opposite conditions requires a good control of all the main factors intervening in both machinability and ductility properties.
In addition, reheating conditions prior to hot rolling will affect this surface, eliminating but also promoting new defects or “weak regions”.
During hot rolling operations, this surface region will be affected by a stress state that can differ from the bulk region.
In this type of mechanical tests the surface of the specimens is smooth without initial defects and, in consequence, nucleation of defects takes an important part of the total applied strain.
Fig. 9 Example of inclusions with voids in conditions corresponding to dynamic recrystallization (steel 9SMn28, T = 1150ºC, 1 s-1, e =1.9) Concluding Remarks The hot workability problems of resulfurized steels are related to a combination of factors where the characteristics of the region close to the billet surface, as well as the high fraction of MnS particles, play a central role.
Online since: March 2007
Authors: Kazuhiko Kamo, Masatoshi Sato, Kiyotomo Nakata
The mechanical property tests, such as tensile, impact, side bend and hardness, were carried out after the repair-welding.
From the results of mechanical properties, the weld metal of low alloy steel could be welded up to a He concentration of 12.9 appm, while the base metal could be done up to only 1.7 appm He.
Mechanical property of repair weld joint was investigated with test specimens according with Figure 4.
Appropriate repair welding conditions for irradiated material show in Table 7 so that repair weld joint is free from cracks and serious porosities and have mechanical properties of which satisfy with criteria of rule.
But a lot of porosities occurred and damaged mechanical property in case of 60 years' irradiation (He 9.7-10.1appm)
Online since: September 2024
Authors: Viktoriya Pasternak, Artem Ruban, Gennady Ivanov, Oleksandr Zemlianskyi
Using Smart-EYE software, the microstructure and heterogeneous structure of PA-1 aluminum powders are justified through a range of factors.
Scientific groups [20] mainly describe imaging methods that are sensitive to external factors such as temperature, humidity, or loading, which can complicate obtaining stable and reliable research results.
Additionally, the AFM method can be used to measure the mechanical and physical properties of materials (heterogeneous environments) such as hardness and elasticity.
This connection between macroscopic behavior and microstructure is crucial for understanding and predicting the physical-mechanical properties and parameters of heterogeneous materials.
Chen, Microstructure, mechanical properties and machinability of particulate reinforced Al matrix composites: a comparative study between SiC particles and high-entropy alloy particles, Journal of Materials Research and Technology 9 (2020) 1-19
Online since: November 2013
Authors: Vladimir Luzin, Ming Xing Zhang, Kevin Spencer, Neil Matthews
Through-thickness residual stress profiles show that the stress magnitude varies significantly and depends mainly on the mechanical properties of the coating material. 1.
This would enable effective residual stress control and tailoring properties of the cold spray coatings.
Cold spray material properties Figure 1.
Third, the only strong correlation is to the mechanical properties of the material itself: the smallest stress is found in plastically soft Zn, Al, Ti and Fe, while the highest values are displayed by Ni and 316SS.
However, one would expect a complex interplay of numerous factors that can affect residual stress accumulation, which can make the former assumption invalid.
Online since: September 2013
Authors: Er Geng Zhang, Ling Chao Kong
Actually the magnitude of stress between the enhanced body and matrix and the degree of stress concentration will affect the binding properties between the particles enhanced phase in the coating and the matrix.
The microstructure size of composite material has great influence on the mechanical properties of composite materials.
Materials of Mechanical Engineering[J], 2003, 27(5), 36-38 [4] Yang Guitong.
Influence of Matrix Pores on the Elastic Properties of Ribbon Reinforced Composite.
Journal of Shengyang Architectural and Civil engineering Institute, 1996, 12(2), 128-125 [9] Zhao Yinghua. the Elastoplastic Properties of Elliptic Cylinder Reinforced Composite.
Online since: June 2014
Authors: Qi Yang Liu, Min He, Jue Wang
Research on Improving Shrinkage Performance of Cement Stabilized Gravel with Waste Rubber Particles LIU Qiyang1, a, HE Min2,b and WANG Jue3,c 1, 2Faculty of Transportation, Kunming University of Science and Technology, Kunming 650500,Yunnan Province, China 3School of Transportation, Southeast University, Nanjing 210096,China 3List all distinct addresses in the same way alliuqqiyyang@163.com, bCorresponding author: 252419553@qq.com, c1050874464@qq.com Keywords: Cement stabilized gravel; rubber particles; dry shrinkage performance Abstract: Cement stabilized gravel has good characters like high strength, good stability, anti-erosion properties and better anti-fatigue property, but it is easy to produce desiccation cracks when humidity changes (caused by evaporation), resulting in reflection crack on the bituminous pavement surface, and then influences performance and the service life of the pavement.
It is gradually favoring the design and construct department because of good plate body, water stability, frost resistance, adjustable mechanical strength and good carrying capacity as the bearing layer of asphalt concrete.
Aggregate particles directly affect the mechanical properties of the mixture.
References [1] QIN Feng: Experimental study on shrinkage properties of cement-stabilized macadam base course with rubber powder.
[2] SUN Zhaohui, XU Zhihong, WU Meifa: Study on gradation design of cement-stabilized macadam considering shrinkage deformation factors.
Online since: April 2009
Authors: Craig A. Brice, Karen M. Taminger, Brian T. Rosenberger, Sankara N. Sankaran, Bryan Woods, Rahbar Nasserrafi
This can lead to detrimental chemistry variations, which can have negative impacts on physical and mechanical properties.
While these changes often yield a material that falls within the AMS 4911 specification, the impact on mechanical properties can be intolerable.
Thus, in order to ensure part-to-part repeatability with known mechanical properties, it is important to develop processing parameters that yield consistent chemistry and therefore consistent properties.
Either scenario can be detrimental to chemistry and mechanical properties.
• Melt pool size, temperature profile, and geometry are likely the key factors in determining aluminium loss during electron beam deposition processing.
Online since: April 2014
Authors: An Hui Cai, Ji Jie Zeng, Xiao Song Li
Effect of Fe on the microstructure and the thermal storage performances of high-silicon aluminum alloy Xiaosong Li 1,a, Anhui Cai 2,b,* and Jijie Zeng 3,c 1,2,3 School of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China, a songxli89@163.com, b cah1970@sohu.com, c jijiezeng@163.com * songxli89@163.com Keywords: Fe, Al-Si alloy; Primary silicon; Expansion coefficient; Thermal conductivity Abstract.
From the eighty's of the last century the late, domestic scholars such as Zhang Renyuan are on the preparation and properties of metal phase change materials for thermal energy storage system, and have been applied in the field of energy storage [3], heating equipment and household appliances, however, study on the metal phase-change energy storage at home and abroad, are concentrated in the screening, heat the material of the test, or thermal analysis, the energy storage process energy analysis and economic analysis [4], and the phase change material in Al-Si alloy smelting and long-term thermal recycling process caused by environmental factors have a certain amount of Fe addition and the composition and structure of the Research on the impact of the aluminum silicon alloy heat storage properties is still lacking, which for the realization of engineering application for a long time is necessary.
Therefore, the size of the primary silicon phase directly affects the size of the stress, so the smaller primary silicon phase thermal expansion properties of the material are also favorable [8].
And that at lower temperatures, the dislocation is often an important factor affecting energy scattering, the high point defect concentration in the case, thermal resistance caused by point defects and non-harmonic vibration associated.
Acknowledgement This work was financially supported by the Project of Hunan Science and Technology (No.2012JJ3141) and the Key Construction Disciplines of Hunan (Mechanical Manufacturing and Automation).
Online since: April 2017
Authors: Jin Feng Geng, Dong Fang Ma, Paul Stevens, Liang Xu, Ying Zhi Li
The forward algorithm is used to predict the structure response for a set of supplied mechanical input properties whereas the reverse algorithm is able to derive the elastic-plastic and/or creep properties from the measured deflection curves.
Cheng found that, for a sharp indentation, a given set of basic mechanical properties can determine the essential features of the structure response, whilst the reverse problem is not unique [15].
Determine elastic-plastic properties.
As the elastic-plastic properties are quite different for each material and temperature, the elastic-plastic properties should be included when the database is built.
[14] ISO, NPR-ISO/TR 29381, Metallic materials – Measurement of mechanical properties by an Instrumented indentation test – indentation tensile properties (ISO/TR 29381: 2008, IDT) [15] Cheng, Y.
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