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Online since: May 2014
Authors: Wen Jun Lu, Rong Shan Qin
Electropulsing treatment with its instantaneous high-energy input is expected to affect solute segregation in some alloys.
Therefore, these investigations by electropulsing can indicate it can affect the diffusion of elements and modify the precipitation of the secondary phases.
The samples were then moulded, mechanical grinded, polished and chemical etched with a solution made by 20 ml hydrochloric acid, 10 ml nitric acid and 20 ml glycerine.
Shing, Effect of surface oxide properties on corrosion resistance of 316L stainless steel for biomedical applications, Corrosion.
Steels Microstructure and Properties, 3rd ed.
Online since: October 2011
Authors: Jian Guang Liu, Shi Hai Zhao, Lie Hui Zhang
However, the anaerobic digestion of high solid rate biomass wastes faces many restraining factors such as organic acids, ammonia nitrogen, salt concentration, heavy metal, toxic organic material and so on.
Therefore it is of great importance for us to make clear the suppression mechanisms of every restraining factors and the suppressing threshold value in the future research on anaerobic digestion.
The basic properties of kitchen waste are shown in table 1.
Study on Influence Factors and kinetics in Anaerobic Digestion of Kitchen Wastes [D] A Thesis Submitted to Chongqing University 2009,(In Chinese) [2] I Angelidaki, L.Ⅱlegaald, B.
[3] Chuanxing Jia, Xuya Peng The experimental research Organic waste two-phase anaerobic digestion of nitrogen transformation properties [D].
Online since: September 2019
Authors: B.V. Farmakovsky, Sergei N. Perevislov, Dmitry A. Gerashchenkov, M.A. Markov, A.M. Makarov, A.D. Bykova, A.N. Belyakov
According to the patent work [7], a silver-based alloy with a high cadmium content has good functional properties.
The purpose of this work is to obtain a functional coating of a silver-based alloy with high operational and technological properties.
Composition chromium zirconium rhenium cerium lanthanum yttrium silver Weight. % 0,6-1,8 4,5-6,0 0,7-1,5 0,6-0,8 0,4-0,9 0,3-0,6 rest The decisive factor in improving the processability and achieving high performance properties of the resulting nanostructured silver-based alloy is, firstly, the choice of alloying components of the alloy and, secondly, the creation of a nanocrystalline coating structure having high corrosion and thermal properties [15].
However, the ternary alloy Ag - (0.6-1.8 wt.%) Cr - (4.5-6.0 wt.%) Zr does not provide, firstly, effective parameters of cold resistance and, secondly, high processability during the deposition of coatings due to non-metallic inclusions (oxides, nitrides, nitrates), which adversely affect the adhesive and cohesive properties of the coating.
The properties of the obtained coatings are shown in comparative tables 2 and 3.
Online since: August 2015
Authors: Paulina Łobodzin, Marian Grądkowski, Wojciech Piątkiewicz
The physicochemical properties of the liquid, including alkalinity, remained stable after repeated filtration.
According to the IPPC Directive, one of the factors considered to be particularly burdensome for the environment is food industry plants.
Due to the composition of dairy wastewater, the emphasis is placed on the mechanical and chemical methods of purification [8, 9].
However, it did not affect the filtration stream in a perceptible way.
This indicates that the regenerated bath retained its cleaning properties.
Online since: July 2015
Authors: Cheng Zhao, Jia Shen Tian
Early in the last century, a series of experimental investigation had been carried out to attempt to reveal the model and the influenced factors of crack initiation and propagation in rock-like material sample.
CASCA, as a pre-processor for FRANC2D/L, is a simple and convenient modeling softwear in which the mesh and geometry properties of the research object can be standardized.
Numerical model Fixed displacement Uniaxial loading H Simple Flaw Loading board W 45° Fig. 1 The sketch of numerical model Corresponding to the experimental specimens, the type of FRANC2D/L model with the same dimension (W × H = 40 × 100 mm); the same physico-mechanical properties of rock-like material (: 47.4MPa; : 2.5Mpa; : 28700MPa; : 0.23); and the same crack distribution (position, dip angle and spacing) were established, as shown in Fig. 1.
Comparison and Discussion In general, through the comparison among samples containing different angled flaws, the similar properties in the process of crack initiation and propagation can be observed.
(3) Peak strength of rock is affected by the angle of pre-existing flaw where it increases linearly,to some degree, with the flaw angle becoming larger, except the opposite tendency from 15° to 30°.
Online since: September 2011
Authors: Dong Fang Hu, Jian Dong Shang, Jun Qi Guo
The effect of its vibration is the most important factor for improving the performance of machines.
The machine column is a relatively complex mechanical device, if we analyze it, the accuracy depends on that weather the computer models are realistic, the thickness of cell division, which requires high computing power as the appropriate basis of analysis.
Solving f (t) = 0 when the homogeneous equation, the general solution will reflect the free vibration characteristics of the system, solving its characteristic equation corresponding to features of the solutions will reflect the structure of the system inherent properties.
Natural frequency and vibration mode is the natural vibration properties of the system, must be by studying the free vibration of undamped solution.
Smaller parts in the modeling of materials and models should be simplified, milling and boring material is mainly composed by the pillars HT300, the material properties: Density: 7.8e3 elastic modulus: 1.3e11Pa Poisson's ratio: 0.24 rail friction coefficient: 0.2 Geometric modeling for machine tool, even in the geometric model with ANSYS is still very difficult to establish.
Online since: July 2011
Authors: Wei Jin, Jian Chen, Jiang Li, Xiang Geng Wei
Due to a number of influence factors, reliable means of investigation is in need.
Analysis of the working condition and performance of throat insert material Nozzle plays an important role in SRM, providing motor thrust which affects the efficiency of motor thrust.
The thermal shock resistance of material refers to that material remains intact under the impact of great temperature variation, known as thermal stability, which demonstrates both the mechanical and thermal properties of material.
[7] Wng Shuxian, Chen Linquan, Liu Yongquan: Experimental investigation on ablation properties of C/C throat-insert, Journal of Solid Rocket Technology, 2007, 30(2)
[8] Yang Sa, Li Jiang, Wang Wenbin, ect: Experimental investigation on Ablation Properties of C/C throat-insert, Journal of Solid Rocket Technology, 2009, 32(3).
Online since: September 2011
Authors: Bin Wu, Cun Fu He, Gang Feng Zheng
Numerical Calculation on Flaw Response in Inhomogeneous Media Gangfeng Zheng1,a, Bin Wu2,b and Cunfu He2,c 1College of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China 2,3College of Mechanical Engineering & Applied Electronics Technology, Beijing University of Technology, Beijing 100022, China agfzheng@aust.edu.cn, bwb@bjut.edu.cn, checunfu@bjut.edu.cn Keywords: NDE, Multi Gaussian Beam, Born approximation, Ultrasonic scattering Abstract.
The elastic properties of grains are anisotropic.
The energy scattered by a flaw when subjected to an incident wave field and received by a transducer (flaw response) depends on the size, shape and material properties of the flaw.
Explicit scattering amplitude expressions can be obtained for volumetric flaws or inclusions whose material properties do not differ substantially from that of the surrounding host material by assuming that the incident wave is only slightly affected by the presence of the flaw.
The essential factors required to model the flaw response are beam model and flaw scattering model.
Online since: August 2020
Authors: Narumol Kreua-Ongarjnukool, Saowapa Thumsing Niyomthai, Chalida Nakalekha Limjeerajarus, Sonntana Seang, Prasit Pavasant
Iloprost increases the expression of angiogenic factors and increases dental pulp flow, suggesting the potential of iloprost as a biomolecule to promote dental pulp regeneration.
Pluronics are block copolymers with varying surface properties.
PF127 concentration is an important factor influencing the gel characteristics, such as gel formation.
The smaller solutes, salts, cosolvents, or cell culture methods may affect the PF127 phase transform behavior [25]
Prasit, Prolonged release of iloprost enhances pulpal blood flow and dentin bridge formation in a rat model of mechanical tooth pulp exposure, J.
Online since: July 2007
Authors: Riccardo Bini, Michele Monno
Introduction The heat flux experienced by the weldment during a TIG welding process determines its final microstructure and the heat affected zone, thus its properties.
This hypothesis allows to treat the plasma as a single species fluid, whose thermodynamic and transport properties are function of its local temperature.
The argon properties vary of several orders of magnitude in the range of temperature of interest, thus a database of the argon properties is needed to numerically solve Eq. 1. [10] In the transferred arc configurations special care is also needed in the implementation of the arcelectrode interfaces, where the LTE hypothesis fails.
Figure 1: Standard TIG welding configuration In the Table 1 we summarize the process parameters and the material properties adopted in the present simulation.
Welding parameters and AISI304 properties.
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