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Online since: December 2011
Authors: Jerzy Łabanowski, Dariusz Fydrych, Aleksandra Świerczyńska
However, the range of parameters is limited by the necessity of providing stability of the welding process and obtaining required properties of the welded joint.
Whereas the complexity of phenomena taking place while forming hydrogen cracks, it can be assumed that a large number of factors affect the amount of diffusible hydrogen in welded joint and some of them are unable to be controlled.
After eliminating the factors whose connection might exclude carrying out the experiment, eleven factors remained.
Still, other factors give the opposite effect.
Whereas other factors affect the outcome parameter in reverse.
Online since: October 2012
Authors: Eugênio José Zoqui, Angel Sanchez Roca, Hipólito Domingo Carvajal Fals
Numerous recent papers have demonstrated the fluidity of gray cast iron in the semi-solid range, including the development of semi-solid ductile cast iron [8]; flow analysis of semi solid processing such as the fluidity and mechanical properties of this material [9,10], and the effect of semi-solid processing on the solidification microstructure and mechanical properties of gray cast iron [11].
The thixoforming process involves heating the material up to the semi-solid range, followed by forming; thus, the material’s final microstructure will determine the mechanical properties of the formed product.
Hironaka, Microstructure and properties of cast iron by semi-solid die casting process, Imono V. 68, I. 2, (1996), pp. 141-147
Nomura, Effect of semi-solid processing on solidification microstructure and mechanical properties of gray cast iron, Materials Science and Engineering A, V. 417A, (2006), pp. 166-173
Nofal, Microstructure, fluidity, and mechanical properties of semi-solid processed ductile iron, Journal of Materials Science, V.
Online since: January 2019
Authors: Wei Min Mao, Z.K. Zheng, Peng Yu Yan
Compared with Figure 2, the primary silicon grains in Figure 3 are obviously refined and the shape factors are modified somewhat.
These factors can make the primary silicon grains larger.
Owing to the higher silicon content in Al-25%Si aluminum silicon alloy, a refining modification treatment generally is required when solidified, so that the equivalent diameter of the primary silicon grains can only meet the requirements of the mechanical properties.
Mandal, Size of primary silicon particles and mechanical properties of as cast high-silicon Al alloys, Trans.
An, Microstructure and mechanical properties of rheo-diecast hypereutectic Al-Si alloy with 2%Fe assisted with ultrasonic vibration process, Journal of Alloys and Compounds, 568 (2013) 42-48
Online since: August 2019
Authors: Luciano Ombres, Maria Antonietta Aiello, Alessio Cascardi, Salvatore Verre
Parametric analysis allowed to evidence the influence of the mechanical and geometrical parameters on the structural performances of the FRCM-system in confining column.
In fact, since the fabric’s role is reasonably similar to the fiber sheet in FRPs (elastic up to failure) the inorganic matrix demonstrated to be significantly damaged (even if the compressive strength of the FRCM-column was not reached) and so negatively affecting the confining pressure, [12].
The slope of the second line, following the cracking of the matrix, was strongly affected by the fabric.
On the other hand, FRCM23-confinement affected the inner core by increasing its compressive strength of 80%.
FRCM-confined masonry columns: experimental investigation on the effect of the inorganic matrix properties.
Online since: September 2013
Authors: Tao Wang, Xiu Hua Ren, Jian Hua Zhang, Yi Zhang
Bubble in RMC is one of the key influences on compression strength, its amount and distribution determines the overall mechanical properties of the composite directly.
Mechanical model of single raised bubble in micro cylinder channel is established based on the flow characteristics of non-newtonian fluid.
How to minimize vibration during manufacturing process is now an important factor that affects machining precision [1].
Compared to cast iron, RMC has ten times the vibration alleviating properties, which is suitable for machine tool bed [2].
Meanwhile, due to the changed viscosity property of resin matrix, internal friction is existed between the bubble and resin matrix.
Online since: December 2024
Authors: R. Prakash Raju, V. Poorna Chandar, K. Bharath Raj, K. Asha Latha, Avilala Navya
These sensors gather data on factors affecting bridge structural integrity, such as vibrations, strain, and environmental conditions.
However, aging infrastructure, environmental factors, and increased traffic loads pose significant challenges to bridge safety and integrity.
Moisture Sensor Moisture sensor property sense the water in the surrounding giving to the data to Arduino board.
Vibration Sensor: Detects vibrations on the bridge caused by various factors such as traffic or external forces.
By integrating Arduino microcontrollers with various sensors, this system enables real-time data acquisition, analysis, and proactive identification of structural weaknesses and environmental factors affecting bridge health.
Online since: March 2017
Authors: Seung Jo Lee
In general, the factors for durability degradation include carbonation, reinforcement corrosion, chemical erosion, and repeated freeze-thaw actions.
Fig. 1 The freeze-thaw action Test Sample Overview of High Performance Concrete Table 1 summarizes the chemical compositions and physical properties of the mineral admixtures, and Table 2 and Fig. 2 show the physical properties and images of the three kinds of fibers.
Table 3 summarizes the physical properties of the aggregate, and Table 4 summarizes the mix proportion of the conventional concrete and the high-performance concrete.
Nevil: Properties of Concrete, Fourth Edition, Longman, 1995, 287 [2] C.
Sabir: Mechanical Properties and Frost Resistance of Silica Fume Concrete [J], Cement and Concrete Composite, 1997, 19, 285-294
Online since: December 2014
Authors: Qi Liang Li, De Shan Wang
Double targets magnetron sputtering codeposition V - C - the structure and mechanical properties of Co films [J].
Unbalanced magnetron sputtering deposition type of graphite carbon film structure and tribological properties [J].
Magnetron sputtering of ZrAlYN coating prepared by the structure and properties of [J].
TiAlN/AlON microstructure and mechanical properties of nanometer multilayer coatings research [J].
Ti6Al4V alloy type of diamond film on the tribological properties and corrosion behavior [J].
Online since: January 2013
Authors: Xi Jun Liu, Ming Jue Li, Ying Yan Diao
The particle size of core-shell latex and the St conversion of shell monomer were affected by emulsifier, initiator, pH and temperature etc.
The seeded emulsion polymerization gradually becomes the most widely-used way to prepare core-shell polymer nanoparticles, because we can obtain composite particles with different morphologies and properties using it [1].
The core-shell nanoparticles have come to be used in a wide variety of polymer enforcement: they can evidently increase the polymer’s wearability, abrasion resistance, anti-water property, weather fastness, UV-resistance, tensile strength, impact strength and interfacial interaction, improve the transparency, decrease the minimum film-forming temperatures(MFTs) and improve the processability[2].
The impacted factors of core-shell monomer percent conversion and the core-shell of particle size affected by emulsifier were studied.
The reactor was consisted of mechanical stirrer, reflux condenser, thermometer and the inlet of nitrogen.
Online since: August 2012
Authors: Gelmires Araújo Neves, Romualdo Rodrigues Menezes, Suélen Silva Figueiredo, Izabelle Marie Trindade Bezerra, João Batista Queiroz de Carvalho, Jozilene de Souza
The physical and mechanical properties were determined by water absorption, density in the hardened mortar and compressive strength, for curing periods of 28, 63 and 91 days in a humid chamber with 100% of relative humidity.
Some researchers [6,7] found that the particle size of the ash also affects the mechanical strength of mortars, indicating that the thinness of the material has great influence on the reactivity of the material.
After molding, the specimens were placed in an environment with 100% relative humidity for periods of 28, 63 and 91 days of cure for the development of cementing properties.
All values obtained for both, reference specimens and to the incorporated with rice husk ash, are in accordance with NBR 13281 [12], confirming the possibility to use husk ash in mortars to improve mechanical properties.
One of the factors that provides an increase in the resistance to compressive of mortars is the improvement in the transition zone, because with the use of silica fume there is a decrease in the amount of crystals resulting from the calcium, the empty spaces and the increase of adhesion cement paste and aggregate [13].
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