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Online since: February 2016
Authors: Jozef Peterka, Juraj Vagovský, Marcel Kuruc
During alternative processing by laser beam machining or diamond grinding, there is generated big amount of heat, which negatively affects structure and mechanical properties of the workpieces.
Its hardness is affected by grain size.
An example of such an application is welding tool for friction stir welding method, which should be utilized for welding of materials with higher mechanical properties (such as stainless steel, nickel alloys, titanium alloys, etc.).
Therefore proper properties of the coolant are necessary.
Beside spindle speed, the most significant factor, which affects torque, is feed rate.
Online since: December 2007
Authors: Orhan Çakır
It was observed that etching temperature for any etchant concentration is important factor in case of depth of etch and surface roughness.
This material is recently established an important place for microelectromechanical systems (MEMS) due to its various mechanical and physical properties.
The chemical properties of material are given Table 1.
Properties of FeCl3 etchant Baumé degree [°Bé] Specific gravity [SG] Molarity [Mol] 32 1.292 2.33 36 1.330 2.70 40 1.383 3.16 44 1.443 3.61 Calculation of Bé: °Bé = [145 (SG-1)/SG] The measurements of thickness were carried out by Mitutoyo outside micrometer (deviation was ±0.001) and surface roughness was measured by Taylor-Hobson Surtronic 3+.
The chemical etching temperature which is one of the important factors, affects the kinetics of metal removal action.
Online since: June 2020
Authors: Asher Yahalom, Shailendra Rajput
Since the system is affected by a total force for a finite period of time this means that the system acquires mechanical momentum and energy, the question then arises how to accommodate the law of momentum and energy conservation.
Since the system is affected by a total force for a finite period of time this means that the system acquires mechanical momentum and energy, the question then arises if we need to abandon the law of momentum and energy conservation.
The mechanical power is given by: (2) J is the current density and E is the electric field.
(5) in the above I(n)(t) stands for the n’th derivative of the current, h is the typical distance between the current loops and is a geometrical factor depending on the loop's geometry.
DOI: 10.1140/epjp/i2016-16374-1 [5] Asher Yahalom “Preliminary Energy Considerations in a Relativistic Engine” Proceedings of the Israeli-Russian Bi-National Workshop ”The optimization of composition, structure and properties of metals, oxides, composites, nano - and amorphous materials”, page 203-213, 28 - 31 August 2017, Ariel, Israel
Online since: June 2020
Authors: Abdul Rahim Mahamad Sahab, Nor Hayati Saad, Norazne Nasir, Norrul Hafizan Ab Wahab
The effect of resin mould in terms of mechanical strength (flexural properties), porosity percentage and percentage of water absorption as well as moulding process were recorded and compared with previous studies of plaster mould.
The broken specimens from flexural test will then be used in Mercury Porosimeter test to determine the porosity properties of resin [15].
Figure 4: Flexural properties of porous resin.
Another significant factor for slip casting to occur is the present of porous mould.
Therefore, it can be clearly said that the heating process does not affect the water absorption properties of porous resin as compared with the plaster mould shown in previous studies.
Online since: September 2007
Authors: Pedro Miguel Guimarães Pires Moreira, A.M.P. de Jesus, A.S. Ribeiro, Paulo Manuel Salgado Tavares de Castro
Monotonic tensile and cyclic tests of welded joints and base material (BM) were performed to understand the influence of the welding process in the static and fatigue mechanical properties.
Table 1 summarizes average values of some relevant mechanical properties extracted from the monotonic tensile curves.
The table also includes reference properties from the BM supplier.
Table 1- Monotonic properties for base material and FS welded specimens.
Karlsson, Microstructure and mechanical properties of friction stir welded aluminium alloys with special reference to AA 5083 and AA 6082.
Online since: June 2017
Authors: Wen Yong Xu, Zhou Li, Yang Liu, Na Liu, Liang Zheng
The properties of the powders and the HIP’ed compacts were investigated in this work.
Recently, numerous works have been conducted on the microstructures and properties of PM TiAl alloys.
High concentration in oxygen and nitrogen will degrade the mechanical properties of TiAl alloys.
Processing and properties of gamma titanium aluminides and their potential for aerospace applications.
Factors affecting particle size of atomized metal powder[J].
Online since: December 2013
Authors: Na Li, Wei Wei Han, Ai Qin Shen, Dong Sheng Zhang
Experimental Study on Effect of Recycled Asphalt Mixture Particles on Properties of Concrete LI Na1, a *, ZHANG Dong-sheng2, b, HAN Wei-wei1, c and SHEN Ai-qin3, d 1Xi' an Highway Research Institute, Xi' an 710054, Shaanxi, China; 2Shaanxi Provincial Communication Construction Group, Xi' an 710065, Shaanxi, China; 3Chang'an University Key Laboratory for Special Area Highway Engineering Ministry of Education , PRC, Xi' an 710064, Shaanxi, China aemail: nalihfeng@126.com, bemail: 1803899891@qq.com, cemail: 511783016qq.com, demail:7795547@qq.com Keywords: Concrete; recycled asphalt mixture fine particles; mechanical characteristics; shrinkage performance; durability Abstract.
What's the properties of concrete with certain proportion of recycled asphalt mixture fine particles replacing equivalent fine aggregate plays a key role on the prospect of its application and development.
This paper mainly focuses on the mechanical characteristics, shrinkage performance and durability of concrete with different dosages of recycled asphalt mixture to make clear of the inner relationship between changes for properties of concrete and different incorporations of the waste. 1 Experimental Raw Materials 1.1 Cement concrete raw materials Cement: using P.
O 42.5 from the Shaanxi Qinling Cement, all the property indicators meet the regulatory requirements.
Table 3 Benchmark mix composition table Water-cement ratio W/c Water consumption (kg/m3) cement (kg/m3) gravel (kg/m3) sand (kg/m3) 0.40 144 360 1281 660 Concrete with 15%,20%,25% proportion of recycled asphalt mixture fine particles replacing equivalent sand are check by mechanical characteristics, shrinkage performance and durability test respectively. 3 Strength Properties Test 3.1 Compressive strength test It is the compressive strength of concrete treat as the fundamental mechanical property of concrete indicator that not only determines the strength grade of concrete, but also affects other mechanical properties of concrete.
Online since: April 2008
Authors: Laszlo J. Kecskes, K.T. Ramesh, Suveen N. Mathaudhu, K.T. Hartwig, Q. Wei
Ultrafine and Nanostructured Refractory Metals Processed by SPD: Microstructure and Mechanical Properties Q.
The most important factors are the inter-channel angle (Source: website of E.
Factors of SPD temperature, routes, number of turns in HPT or number of passes in ECAE, should be considered.
Mechanical Properties of SPD Processed UFG/NS Refractory Metals Critical and comprehensive reviews on the experimental and theoretical aspects of the mechanical properties of UFG/NS metals have been given by a number of authors and groups[5, 6, 9].
Valdre, "Mechanical properties of nanostructured chromium " Nanostructured materials, vol. 12, pp. 1103-1108, 1999
Online since: September 2008
Authors: Xiao Ming Tao, Shou Xiang Jiang, C.W.M. Yuen, C.W. Kan, L. Zhang, P.S.R. Choi
Functional Properties of Electroless Silver-plated Cotton Fabric via LTP Pre-treatment S.
Silver-plated textiles have exhibited their specific features not only on mechanical performance but also on functional properties.
In this study, silver plating technique was applied on cotton fabric to improve its functional properties, especially the anti-bacterial and anti-UV properties.
The silver-plated cotton fabric was characterized in terms of its functional properties.
The silver-plated cotton fabrics were characterized in terms of functional properties, i.e. anti-static, anti-bacterial, UV protection and water repellency properties.
Online since: October 2010
Authors: Jun Xu, Meng Yi Zhu, Bo Han Liu, Yue Ting Sun, Yi Bing Li
In the model, crack bluntness coefficient is an unknown parameter, depending on various factors, so speed domain is then divided into five intervals and sample real-world accident cases are employed to the calibrate crack bluntness coefficient in different speed intervals.
Lastly but not the least, glass fragment is very small and can be easily affected by other factors such as wind and pedestrian's body.
Calibration of crack bluntness coefficient Factors relating to crack bluntness.
Crack bluntness n is dependent on the material mechanical properties, strain rate (impact speed), mass of the impactor and shape of the impactor [9].
Here the mechanical properties of windshields and shapes of the heads are considered the same in all cases.
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