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Online since: December 2014
Authors: Mahmoud M. Tash, Khaled A. Abuhasel, Saleh A. Alkahtani
Magnesium (Mg) is normally used to improve the mechanical properties of the alloy through the precipitation of the Mg2Si and Al2CuMg intermetallics [1].
Heat treatment is one of the major factors used to enhance the mechanical properties of heat-treatable Al-Si alloys, through an optimization of both solution and aging heat treatment given to these alloys.
Eutectic silicon morphology, viz., particle size and shape, plays an important role in determining the mechanical properties of Al-Si alloy castings.
Once the responses, factors (6) and levels have been selected, see Table 3, the next step is to design the experimental runs.
The factors and their uncoded levels are listed in Table 3.
Online since: June 2019
Authors: Xiao Yu Wang, Rui Tang, Xin Wei Bo, Qi Liu, Chun Dong Jiang, Yan Hui Wang
The main factors of affect sintering densification included particle size, particle size distribution, powder compaction process, sintering temperature, sintering process.
The preparation technology of high purity vanadium, mechanical properties and microstructure characteristics of vanadium metal had been studied at home and abroad [5-13].
Especially as a key material of self-sufficiency detector, vanadium wire was far behind foreign products in purity, mechanical properties and service life [14].
High temperature mechanical properties and fracture characteristics of pure vanadium.
Study on preparation and properties of pure vanadium.
Online since: May 2020
Authors: A.K. Kychkin, G.G. Vinokurov, N.F. Struchkov
Flux-cored wires under test are sheaths of mild steel St08kp, filled with a powder mixture with a particle size of 40-100 microns; fill factors are 0.28-0.3.
For comparative study of the microstructure, elemental composition and properties, transverse metallographic sections of coatings were made.
The properties of the hardness of powder coatings are known to significantly affect their wear resistance.
Thus, the use of complex concentrates as modifying additives allows us to control the properties of the coating hardness.
Zyryanov, Effects of rare-earth metal modification on the mechanical and corrosion properties of low-alloy steels, TSU Science Vector. 4(14) (2010) 41-46
Online since: February 2007
Authors: Ruo Ding Wang, Na Li, Hong'an Xi, Qin Li, Su Min Zhu, Shu Qiang Ding
However, these porous SiC ceramics were obtained at very high firing temperatures or with low melting point compositions in the SiC grain boundaries which commonly impair the mechanical and physical properties of the material.
The pyrolysis conversion process of PCS as well as the structures and mechanical properties of the specimens will be discussed.
By varying the content ratio of SiC powders to PCS and the starting SiC particle size distributions, pore structures and mechanical properties were evaluated.
area model, the mechanical properties of porous ceramics are determined by the interparticle bonding area [12], so, when PCS content is low, only limited bonding between SiC particles can be achieved, which is the cause of low strength.
The particle size distributions of the starting SiC powders and PCS content are two important factors which affect both microstructures and mechanical properties of the as-prepared specimens.
Online since: November 2013
Authors: Yi Wang Bao, Xiao Gen Liu
The existence of a temperature difference across a vacuum glazing causes dimensional differences between the hot and cold glass sheets, with associated mechanical stresses and bending.
In order to understand the distribution characteristics of the stresses and deformation in vacuum glazing due to temperature difference, in this work, the mechanical models were established and the calculation formula of the shear stress in the edge seal and bending tensile stress on the surface of the two glass sheets of the vacuum glazing were given.
The objectives of the present work were to study the distribution characteristics of the stresses and deformation in vacuum glazing and its affecting factors due to temperature difference.
Characterization of the Thermal Insulating Properties of Vacuum Glazing.
Online since: October 2011
Authors: Bing Guo, Xiao Tong Peng
Elasto-plastic Properties of Panel Zones and Effects on Story Drift of Steel Frames Bing Guo1, a, Xiaotong Peng2, b 1 College of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China 2 College of Civil Engineering, University of Jinan, Jinan 250022, China a email: sdgb123@163.com, b email: pengxito@163.com Keywords: panel zone, strength, stiffness, story drift, steel frames.
In order to explore the elasto-plastic properties of PZs, tests of different types of beam-column connections under monotonic loads were conducted firstly.
Focus of tests is to explore the influence factors on elasto-plastic properties of PZs.
And the strengthening factor can be assumed 4/3 according to China specification JGJ99:98.
First, employing the traditional mechanical method and not considering deformation of PZs (that is assuming the PZs is rigid), to calculate the frame story drift angle θ0j, j=1, … , m, where m is the floor number. 2.
Online since: March 2016
Authors: Huda Abdullah, Sahbudin Shaari, Mohd Ambar Yarmo, Mohd Zikri Razali, Savisha Mahalingam, Azimah Omar
ZnO has unique properties with variety of nanostructures such as nanowires, nanoflakes, nanoparticles and nanobelts [3].
CNTs act as a catalyst to improve the electrical properties of the DSSC.
Table 1: XRD properties of ZnO based with different concentrations of MWCNTs.
The electrical properties listed in Table 2 includes short-circuit current density, Jsc, open-circuit voltage, Voc, fill factor, FF and power conversion efficiency, PCE or η.
Feng et al. (2005) reported that MWCNT also influences the PCE of the DSSCs due to the fluctuation in Jsc and Voc where they affecting the amount of dye adsorb inside the cell and recombination of electron and hole [15].
Online since: December 2013
Authors: Thanh Hien Lam, Peng Jen Chen, Jun Hsien Yeh, Tsun Ho Lin, Thanh Lam Nguyen, Ming Hung Shu, Bi Min Hsu
The adjusted R2 of this model is 59.5%, which explains about 60% of the variation of EP[Mn] (%) affected by EP[C] (%), EPT and T.Fe (%).
It can be noted that 40% of unexplained variation caused by uncontrollable factors is beyond the scope of this study
However, to keep the free-cutting properties and the continuous casting rate, the usage of [Al] or ferrosilicon must be limited to a reasonable amount.
The factors settings are shown in Table 3.
Table 3 Experiments of the blowing and refining factors for the sulfur free-cutting steels Process Factors Factor Code Levels Blowing Manganese ore (WMnO) A 2 T.Fe B 2 EPT C 2 EP[C] D 2 Refining f[O] in liquid steel A 2 [Si] in ladle furnace (LFSi) B 2 Aluminum (LFAl) C 2 Table 4 New setting standards No Process and Parameter Specification limit 1 Set the refining process #A5 process (BOF-RH-LF-C.C.) 2 Set the refining parameters HM Ratio: 90%±5; Lime (CaO): 2100Kg±30; Slag volume 4500Kg±20; EP[C]: 11pts±3; WMnO: 2500Kg±20; EPT: 16750C±10; T.Fe: 17.5%±3; f[O]: 70ppm±5; LF Aluminum usage (LFAl): 110Kg±10; LF[Si]: 4pts±2. 3 Set the temperature and composition control methods of the BOF and the refining station Controlling the EPT range within ±100C, and composition range within ±3pts at each BOF and the refining station.
Online since: September 2013
Authors: Cristina E. Lanivschi, Alexandru Secu, Gabriela M. Atanasiu
Thus is explained the important differences between the mechanical properties of wood in parallel and perpendicular to the grain directions.
The mechanical properties of the softwood currently used for timber structures in Romania, with its different parallel to the grain, radial and tangential elasticity properties, aligned considering the structural elements longitudinal axes, are defined.
Regarding the mechanical properties of the material, in the analysis were defined only parallel to the grain wood`s elasticity modulus of 11.30 GPa and the shear modulus of 5.00 GPa.
The transversal cross-sections geometry and material properties were assigned to each structural element.
These are the major factors that lead to important differences between the external forces applied to the structure and, consequently the stresses that occur in the structural elements.
Online since: July 2021
Authors: Husaini Husaini, Abdullah Abdullah, Muttaqin Hasan, Yulius Rief Alkhaly
Another factor affecting the compressive strength of RPC is the post-casting treatment which is known as the concrete curing.
Türkel, Mechanical properties of reactive powder concrete containing high volumes of ground granulated blast furnace slag, Cem.
Mubarak, Mix design and properties of reactive powder concrete with diatomaceous earth as cement replacement, IOP Conf.
Brouwers, Mix design and properties assessment of Ultra-High Performance Fibre Reinforced Concrete (UHPFRC), Cem.
Hillemeier, Combined effect of fine fly ash and packing density on the properties of high performance concrete : An experimental approach, Constr.
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